HomeDocs changes
Documentation changes
What the docs quietly changed.
Anthropic's published documentation, fetched on a schedule and diffed against the last copy. Every edit dated, including the ones that never made a release note.
Last poll read all 4 cleanly: Claude Code CLI, Claude Developer Platform, Claude Documentation, Model Context Protocol. A date here is when this site noticed, not when Anthropic edited.
Claude Developer Platform
812pages tracked
765 changed this week · last read 23 Oct 2026
Claude Code CLI
228pages tracked
147 changed this week · last read 23 Oct 2026
Claude Documentation
280pages tracked
77 changed this week · last read 23 Oct 2026
Model Context Protocol
357pages tracked
171 changed this week · last read 22 Oct 2026
100 on this page
9,955 of the ledger's changes in api. Show every change
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20 Aug 2026
249 pages
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api
managed-agents/define-outcomes
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managed-agents/define-outcomes
<Note>
Uploading through the Files API doesn't require a beta header. The cURL example sends the `managed-agents-2026-04-01` header it uses throughout this walkthrough, which the Files
</Note>
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
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manage-claude/cmek
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manage-claude/cmek
| | Browser use |
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manage-claude/api-and-data-retention
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manage-claude/api-and-data-retention
The error message lists the non-eligible features detected in the request; remove them and retry. The phrase "without Zero Data Retention" is the API's own wording and does not cha
The error message lists the non-eligible features detected in the request; remove them and retry. The phrase "without Zero Data Retention" is the API's own wording and does not cha
HIPAA readiness controls are applied to your organization as soon as you accept. Once HIPAA readiness is enabled for your organization, the configuration is permanent and canno
HIPAA readiness controls are applied to your organization as soon as you accept. Once HIPAA readiness is enabled for your organization, the configuration is permanent and canno
* **No:** The feature is not eligible. Under HIPAA readiness, the API blocks requests that include a "No" feature and returns a `400` error. Under ZDR, the API does **not** block t
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build-with-claude/working-with-messages
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build-with-claude/working-with-messages
<Card title="Browser use tool" icon="browser" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool">
Let Claude navigate, read, and interact with webpages in a browser you run.
</Card>
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build-with-claude/vision-coordinates
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build-with-claude/vision-coordinates
Screenshots and zoom images that you return to the [computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool#handle-coordinate-scaling-for-high
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build-with-claude/vision
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build-with-claude/vision
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
// The PHP SDK supports file_id document and image sources only through $client->beta->messages with the files beta.
If a single API request contains more than 20 images, a stricter per-image dimension limit applies. On Amazon Bedrock and Google Cloud, document blocks such as PDFs also count towa
If a single API request contains more than 20 images, a stricter per-image dimension limit applies to every image in that request. All `image` blocks in the request count toward th
Each model has a maximum native image resolution, expressed as a long-edge limit and a visual-token limit. Images larger than either limit are downscaled before processing; see [Ho
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build-with-claude/skills-guide
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build-with-claude/skills-guide
Skills are generally available on the Claude API and don't require an `anthropic-beta` header, either for the Skills API or for `container.skills` in Messages requests. Requests th
// The PHP SDK supports container skills only through $client->beta->messages with the skills beta.
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
// The PHP SDK supports container skills only through $client->beta->messages with the skills beta.
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build-with-claude/search-results
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build-with-claude/search-results
<Card title="Web search tool" icon="browser" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool">
<Card title="Web search tool" icon="magnifying-glass" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool">
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build-with-claude/prompt-engineering/prompting-claude-sonnet-5
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build-with-claude/prompt-engineering/prompting-claude-sonnet-5
Claude Sonnet 5 supports the `computer_20251124` tool version. [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) capability works acro
On the Claude API, Claude Sonnet 5 supports the `computer_toolset_20260801` toolset and the earlier `computer_20251124` tool version. For tasks inside webpages, Claude Sonnet 5 als
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build-with-claude/prompt-engineering/prompting-claude-opus-4-8
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build-with-claude/prompt-engineering/prompting-claude-opus-4-8
[Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) capability works across resolutions, up to a maximum resolution of 2576px / 3.75MP.
On the Claude API, Claude Opus 4.8 supports the `computer_toolset_20260801` toolset and the earlier `computer_20251124` tool version. For tasks inside webpages, Claude Opus 4.8 als
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build-with-claude/prompt-engineering/claude-prompting-best-practices
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build-with-claude/prompt-engineering/claude-prompting-best-practices
5. **Provide verification tools:** As the length of autonomous tasks grows, Claude needs to verify correctness without continuous human feedback. Tools like Playwright MCP server o
5. **Provide verification tools:** As the length of autonomous tasks grows, Claude needs to verify correctness without continuous human feedback. Tools that let Claude verify UI wo
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build-with-claude/pdf-support
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build-with-claude/pdf-support
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
// The PHP SDK supports file_id document and image sources only through $client->beta->messages with the files beta.
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build-with-claude/overview
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build-with-claude/overview
| Feature | Description
| ----------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------
| [Bash](https://platform.claude.com/docs/en/agents-and-tools/tool-use/bash-tool) | Execute bash commands and scripts to interact with the system shell and perform
| [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) | Control computer interfaces by taking screenshots and issuing mouse and keyboard
| [Memory](https://platform.claude.com/docs/en/agents-and-tools/tool-use/memory-tool) | Enable Claude to store and retrieve information across conversations. Build know
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build-with-claude/files
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build-with-claude/files
<Note>
Requests to the Files API endpoints (`/v1/files`) don't need a beta header. Neither do Messages or Message Batches requests that reference an uploaded file as a `document` or `im
</Note>
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
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build-with-claude/claude-platform-on-aws
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build-with-claude/claude-platform-on-aws
* **Computer use and browser use toolsets:** `computer_toolset_20260801` and `browser_toolset_20260801` are not currently available on Claude Platform on AWS. The beta [computer us
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build-with-claude/claude-on-vertex-ai
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build-with-claude/claude-on-vertex-ai
* [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/br
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build-with-claude/claude-on-amazon-bedrock-legacy
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build-with-claude/claude-on-amazon-bedrock-legacy
* [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/br
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build-with-claude/claude-in-microsoft-foundry
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build-with-claude/claude-in-microsoft-foundry
* [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/br
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build-with-claude/claude-in-amazon-bedrock
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build-with-claude/claude-in-amazon-bedrock
* [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/br
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build-with-claude/citations
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build-with-claude/citations
<Note>
These examples reference the uploaded file as a `document` source, and no beta header is required. See [Files API](https://platform.claude.com/docs/en/build-with-claude/files
</Note>
These examples reference a file uploaded through the [Files API](https://platform.claude.com/docs/en/build-with-claude/files) as a `document` source.
// The PHP SDK supports file_id document and image sources only through $client->beta->messages with the files beta.
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api/overview
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api/overview
Some list endpoints use a different cursor scheme. The [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing), the [Models API](https://pla
Some list endpoints use a different cursor scheme. The [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing), the [Models API](https://pla
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agents-and-tools/tool-use/web-fetch-tool
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agents-and-tools/tool-use/web-fetch-tool
The web fetch tool currently does not support websites dynamically rendered with JavaScript.
The web fetch tool currently does not support websites dynamically rendered with JavaScript. For pages that need a real browser (JavaScript rendering, clicking, or filling forms)
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agents-and-tools/tool-use/troubleshooting-tool-use
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agents-and-tools/tool-use/troubleshooting-tool-use
Full directory of Anthropic-schema tools and their version strings.
Full directory of Anthropic-provided tools and their version strings.
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agents-and-tools/tool-use/tool-use-with-prompt-caching
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agents-and-tools/tool-use/tool-use-with-prompt-caching
The [computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/
| Tool | Caching considerations |
| --------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------- |
| [Web search](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) | Enabling or disabling invalidates the system and messages caches |
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agents-and-tools/tool-use/tool-search-tool
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agents-and-tools/tool-use/tool-search-tool
The computer use and browser use toolsets (`computer_toolset_20260801` and `browser_toolset_20260801`) take `defer_loading` per member tool inside the entry's `configs` object, not
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agents-and-tools/tool-use/tool-reference
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agents-and-tools/tool-use/tool-reference
description: Directory of Anthropic-provided tools and reference for optional tool definition properties.
description: Directory of Anthropic-provided server tools, client tools, and client toolsets, plus reference for optional tool definition properties.
| Tool | `type`
| -------------------------------------------------------------------------------------------------------- | -----------------------------------------------------------------------
| [Web search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) | `web_search_20260318` `web_search_20260209` `web_search_20250305`
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agents-and-tools/tool-use/tool-combinations
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agents-and-tools/tool-use/tool-combinations
## Long-running agent: memory + any toolset
## Long-running agent: memory + any other tools
Memory is orthogonal to the rest of your toolset. It doesn't change how other tools behave; it gives Claude a place to write down and later retrieve facts that would otherwise be l
Memory is orthogonal to your other tools. It doesn't change how they behave; it gives Claude a place to write down and later retrieve facts that would otherwise be lost when the co
"tools": [
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agents-and-tools/tool-use/strict-tool-use
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agents-and-tools/tool-use/strict-tool-use
The [computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/
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agents-and-tools/tool-use/server-tools
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agents-and-tools/tool-use/server-tools
<Card title="Web search tool" icon="browser" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool">
<Card title="Web search tool" icon="magnifying-glass" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool">
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agents-and-tools/tool-use/programmatic-tool-calling
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agents-and-tools/tool-use/programmatic-tool-calling
* The [computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) and [browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-us
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agents-and-tools/tool-use/parallel-tool-use
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agents-and-tools/tool-use/parallel-tool-use
The [computer use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool#batch-actions) and the [browser use tool](https://platform.claude.com/docs/e
Execution order is your choice. If your tools have ordering dependencies, running the batch sequentially and stopping on the first failure is a valid strategy: return `is_error: tr
Execution order is your choice. If your tools have ordering dependencies, running the batch sequentially and stopping on the first failure is a valid strategy (and the required one
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agents-and-tools/tool-use/overview
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agents-and-tools/tool-use/overview
<Card title="Browser use tool" icon="browser" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool">
Navigate, read, and interact with webpages in your own browser environment.
</Card>
<Card title="Web search tool" icon="browser" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool">
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agents-and-tools/tool-use/how-tool-use-works
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agents-and-tools/tool-use/how-tool-use-works
For a handful of common operations (managing scratchpad memory, running shell commands, editing files, controlling a browser), Anthropic publishes the tool schema and your applicat
For a handful of common operations (managing scratchpad memory, running shell commands, editing files, controlling a desktop or a browser), Anthropic publishes the tool schema and
| Approach | When to use it | What to expect
| ----------------------------- | ------------------------------------------------------------- | ----------------------------------------------------------------------------------
| User-defined client tools | Custom business logic, internal APIs, proprietary data | You handle execution and the agentic loop
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agents-and-tools/tool-use/handle-tool-calls
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agents-and-tools/tool-use/handle-tool-calls
A `tool_use` block for a member of the [computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) or [browser use](https://platform.claude.com/
A `tool_result` that answers a computer use or browser use member block must also echo the same `toolset_name` value as the `tool_use` block; a member result that omits it is rejec
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agents-and-tools/tool-use/fine-grained-tool-streaming
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agents-and-tools/tool-use/fine-grained-tool-streaming
The `eager_input_streaming` field is optional. Setting it to `true` turns on fine-grained streaming for that tool, and omitting it gives you standard buffered streaming, in which t
The `eager_input_streaming` field is optional. Setting it to `true` turns on fine-grained streaming for that tool, and omitting it gives you standard buffered streaming, in which t
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agents-and-tools/tool-use/define-tools
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agents-and-tools/tool-use/define-tools
Client tools (both Anthropic-schema and user-defined) are specified in the `tools` top-level parameter of the API request. Each tool definition includes:
Client tools are specified in the `tools` top-level parameter of the API request. Anthropic-schema client tools, such as the bash and text editor tools, are declared by a date-vers
For the full set of optional properties available on any tool definition, including `cache_control`, `strict`, `defer_loading`, and `allowed_callers`, see the [Tool reference](http
For the full set of optional properties available on any single tool definition, including `cache_control`, `strict`, `defer_loading`, and `allowed_callers`, see the [Tool referenc
* **Not supported for server-side tools** - Input examples work on user-defined and Anthropic-schema client tools, but not on server tools such as web search or code execution
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agents-and-tools/tool-use/computer-use-tool
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agents-and-tools/tool-use/computer-use-tool
description: Give Claude screenshot, mouse, and keyboard control of a desktop environment with the computer use tool.
description: Give Claude screenshot, mouse, and keyboard control of a desktop environment with the computer use tool, the computer_toolset_20260801 client toolset.
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `computer-use-2025-11-24`
- Supported models: `claude-opus-5`, `claude-sonnet-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-opus-4-6`, `claude-sonnet-4-6`, `claude-opus-4-5-20251101`
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agents-and-tools/tool-use/code-execution-tool
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agents-and-tools/tool-use/code-execution-tool
To analyze your own data files (such as CSV, Excel, or images), upload them through the Files API and reference them in your request:
<Note>
This workflow doesn't require a beta header: uploading and downloading files through the Files API and referencing them in `container_upload` blocks are all generally available.
</Note>
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agents-and-tools/tool-use/browser-use-tool
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agents-and-tools/tool-use/browser-use-tool
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agents-and-tools/tool-use/bash-tool
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agents-and-tools/tool-use/bash-tool
The original `bash_20241022` version is part of the computer use beta, and the October 2024 Claude Sonnet 3.5 release ([retired](https://platform.claude.com/docs/en/about-claude/mo
The original `bash_20241022` version works only with the October 2024 Claude Sonnet 3.5 model ([retired](https://platform.claude.com/docs/en/about-claude/model-deprecations)). Requ
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agents-and-tools/mcp-connector
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agents-and-tools/mcp-connector
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
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agents-and-tools/agent-skills/quickstart
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agents-and-tools/agent-skills/quickstart
// The PHP SDK exposes the Skills API under the beta namespace; field names can differ from other SDKs.
// The PHP SDK supports container skills only through $client->beta->messages with the skills beta.
Skills are generally available on the Claude API and don't require a beta header. This covers the Skills API, the `container.skills` parameter, and the Files API. Requests that s
The examples use the `code_execution_20260521` tool version, and the Step 3 code parses the result types that current tool versions return. Skills also work with older [code exec
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agents-and-tools/agent-skills/overview
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agents-and-tools/agent-skills/overview
**Prerequisites:** Using Skills through the API requires the [code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool), whose contain
**Prerequisites:** Using Skills through the API requires the [code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool), whose contain
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about-claude/pricing
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about-claude/pricing
**System prompt overhead:** The computer use beta adds 466–499 tokens to the system prompt
**Computer use tool token usage:**
| Model | Input tokens per tool definition |
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about-claude/models/whats-new-sonnet-5
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about-claude/models/whats-new-sonnet-5
Claude Sonnet 5 supports the [1M token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) by default (1M tokens is both the default and the maxi
Claude Sonnet 5 supports the [1M token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows) by default (1M tokens is both the default and the maxi
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about-claude/models/migration-guide
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about-claude/models/migration-guide
Claude Opus 5 should have strong out-of-the-box performance on existing Claude Opus 4.7 prompts and evals, at the same pricing of $5 per million input tokens and $25 per million ou
Claude Opus 5 should have strong out-of-the-box performance on existing Claude Opus 4.7 prompts and evals, at the same pricing of $5 per million input tokens and $25 per million ou
Two exceptions: [web fetch](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) is not available on Claude Opus 5, and [Priority Tier](https://platform.cl
Two exceptions: [web fetch](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) is not available on Claude Opus 5, and [Priority Tier](https://platform.cl
Claude Sonnet 5 is a drop-in upgrade for Claude Sonnet 4.6, priced at $2/$10 USD per million input/output tokens; see [Pricing](https://platform.claude.com/docs/en/about-claude/pri
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release-notes/overview
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release-notes/overview
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first.
* The [Files API](https://platform.claude.com/docs/en/build-with-claude/files) is now generally available on the Claude API. Requests to the `/v1/files` endpoints, and Messages API
* [Agent Skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview) and the Skills API (`/v1/skills`) are now generally available on the Claude API. Reques
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managed-agents/vaults
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managed-agents/vaults
```bash CLI
VAULT_ID=$(ant beta:vaults create \
--display-name "Alice" \
--metadata '{external_user_id: usr_abc123}' \
--transform id --raw-output)
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api
managed-agents/tools
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apichanged
managed-agents/tools
Configs: []anthropic.BetaManagedAgentsAgentToolConfigUnionParamsUnion{{
OfBetaManagedAgentsWebFetchToolConfigs: &anthropic.BetaManagedAgentsWebFetchToolConfigParams{
Configs: []anthropic.BetaManagedAgentsAgentToolConfigParamsUnion{{
OfWebFetch: &anthropic.BetaManagedAgentsWebFetchToolConfigParams{
Configs: []anthropic.BetaManagedAgentsAgentToolConfigUnionParamsUnion{
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managed-agents/skills
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managed-agents/skills
description: Attach reusable, filesystem-based expertise to your agent for domain-specific workflows.
description: Attach pre-built or custom skills to an agent in Claude Managed Agents to give it reusable, filesystem-based expertise for domain-specific workflows.
The Skills API doesn't require a beta header. The cURL example still sends `anthropic-beta: skills-2025-10-02`, and the CLI and SDK `beta` commands add it automatically; requests t
These examples omit the optional `display_title` field, so the skill's title is derived from `SKILL.md`. An explicitly passed `display_title` must be unique among the custom skills
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api
managed-agents/self-hosted-sandboxes
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apichanged
managed-agents/self-hosted-sandboxes
```bash CLI
ant beta:environments create \
--name self-hosted \
--config '{"type": "self_hosted"}'
```
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api
managed-agents/quickstart
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managed-agents/quickstart
VERSION=1.22.1
VERSION=1.26.1
implementation("com.anthropic:anthropic-java:2.53.0")
implementation("com.anthropic:anthropic-java:2.57.0")
```bash CLI
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api
managed-agents/permission-policies
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apichanged
managed-agents/permission-policies
```bash CLI
ant beta:agents create <<'YAML'
name: Coding Assistant
model: claude-opus-5
tools:
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api
managed-agents/multiagent-orchestration
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managed-agents/multiagent-orchestration
```bash CLI
ant beta:agents create <<YAML
name: Engineering Lead
model: claude-opus-5
system: You coordinate engineering work. Delegate code review to the reviewer agent and test writing to the test agent.
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api
managed-agents/migration
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managed-agents/migration
```bash CLI
{ read -r _ agent_id; read -r _ agent_version; } < <(ant beta:agents create \
--name "Task Runner" \
--model claude-opus-5 \
--tool '{type: agent_toolset_20260401}' \
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api
managed-agents/memory
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apichanged
managed-agents/memory
On July 22, 2026, the `managed-agents-2026-04-01` header adopts the same list behavior on `GET /v1/memory_stores/{memory_store_id}/memories`; sending `agent-memory-2026-07-22` op
`GET /v1/memory_stores/{memory_store_id}/memories` behaves the same under either header: results come back in a stable, server-defined order, and `path_prefix` and `depth` apply
Each attached store is mounted inside the session's sandbox as a directory under `/mnt/memory/`. The directory name is the store's display name sanitized to a filesystem-safe slug
Each attached store is mounted inside the session's sandbox as a directory under `/mnt/memory/`. The directory name is the store's display name sanitized to a filesystem-safe slug
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api
managed-agents/mcp-connector
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managed-agents/mcp-connector
```bash CLI
AGENT_ID=$(ant beta:agents create \
--name "GitHub Assistant" \
--model '{id: claude-opus-5}' \
--mcp-server '{type: url, name: github, url: "https://api.githubcopilot.com/mcp/"}' \
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api
managed-agents/github
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managed-agents/github
```bash CLI
AGENT_ID=$(ant beta:agents create \
--name "Code Reviewer" \
--model '{id: claude-opus-5}' \
--system "You are a code review assistant with access to GitHub." \
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api
managed-agents/files
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managed-agents/files
FILE_ID=$(ant beta:files upload \
FILE_ID=$(ant files upload \
file = client.beta.files.upload(file=Path("data.csv"))
file = client.files.upload(file=Path("data.csv"))
const file = await client.beta.files.upload({
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managed-agents/environments
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managed-agents/environments
```bash CLI
ant beta:environments create \
--name "python-dev" \
--config '{type: cloud, networking: {type: unrestricted}}'
```
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api
managed-agents/define-outcomes
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managed-agents/define-outcomes
RUBRIC_ID=$(ant beta:files upload \
RUBRIC_ID=$(ant files upload \
rubric = client.beta.files.upload(file=Path("/tmp/rubric.md"))
rubric = client.files.upload(file=Path("/tmp/rubric.md"))
const rubric = await client.beta.files.upload({
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api
managed-agents/agent-setup
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apichanged
managed-agents/agent-setup
```bash CLI
agent=$(ant beta:agents create \
--name "Coding Assistant" \
--model '{id: claude-opus-5}' \
--system "You are a helpful coding agent." \
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api
manage-claude/user-management
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manage-claude/user-management
**The endpoints on this page are generally available for Claude Enterprise organizations.** The [beta header](https://platform.claude.com/docs/en/api/beta-headers) `anthropic-bet
**The endpoints on this page are generally available for Claude Enterprise organizations.** The [beta header](https://platform.claude.com/docs/en/api/beta-headers) `anthropic-bet
-H "x-api-key: $ANTHROPIC_ADMIN_KEY" \
-H "anthropic-beta: ce-user-management-2026-07-13"
-H "x-api-key: $ANTHROPIC_ADMIN_KEY"
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api
manage-claude/api-and-data-retention
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apichanged
manage-claude/api-and-data-retention
| [Web fetch](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) | `/v1/messages` (with `web_fetch` tool) | <E
| [Web fetch](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) | `/v1/messages` (with `web_fetch` tool) | <E
* [Files API reference](https://platform.claude.com/docs/en/api/beta/files/upload)
* [Files API reference](https://platform.claude.com/docs/en/api/files/upload)
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api
get-started
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apichanged
get-started
implementation("com.anthropic:anthropic-java:2.53.0")
implementation("com.anthropic:anthropic-java:2.57.0")
<version>2.53.0</version>
<version>2.57.0</version>
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api
cli-sdks-libraries/sdks/typescript
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cli-sdks-libraries/sdks/typescript
await anthropic.beta.files.upload({ file: mcpResourceToFile(fileResource) });
await anthropic.files.upload({ file: mcpResourceToFile(fileResource) });
await client.beta.files.upload({
await client.files.upload({
await client.beta.files.upload({
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cli-sdks-libraries/sdks/ruby
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cli-sdks-libraries/sdks/ruby
file_metadata = anthropic.beta.files.upload(file: Pathname("/path/to/file"))
file_metadata = anthropic.files.upload(file: Pathname("/path/to/file"))
file_metadata = anthropic.beta.files.upload(file: File.read("/path/to/file"))
file_metadata = anthropic.files.upload(file: File.read("/path/to/file"))
file_metadata = anthropic.beta.files.upload(file: file)
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cli-sdks-libraries/sdks/python
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cli-sdks-libraries/sdks/python
client.beta.files.upload(
client.files.upload(
client.beta.files.upload(
client.files.upload(
For example, to use the [Files API](https://platform.claude.com/docs/en/build-with-claude/files):
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api
cli-sdks-libraries/sdks/java
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cli-sdks-libraries/sdks/java
implementation("com.anthropic:anthropic-java:2.53.0")
implementation("com.anthropic:anthropic-java:2.57.0")
<version>2.53.0</version>
<version>2.57.0</version>
import com.anthropic.models.beta.files.FileMetadata;
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cli-sdks-libraries/sdks/go
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cli-sdks-libraries/sdks/go
This library requires Go 1.23+.
This library requires Go 1.24+.
anthropic.BetaFileUploadParams{
anthropic.FileUploadParams{
anthropic.BetaFileUploadParams{
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cli-sdks-libraries/sdks/csharp
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cli-sdks-libraries/sdks/csharp
using Anthropic.Models.Beta.Files;
using Anthropic.Models.Files;
var response = await client.Beta.Files.Download(parameters);
var response = await client.Files.Download(parameters);
using var response = await client.Beta.Files.Download(parameters);
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cli-sdks-libraries/cli/using
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cli-sdks-libraries/cli/using
Resources in beta (including agents, sessions, deployments, environments, and skills) live under the `beta:` prefix. Commands in this namespace automatically send the appropriate `
Resources in beta (including agents, sessions, deployments, and environments) live under the `beta:` prefix. Commands in this namespace automatically send the appropriate `anthropi
ant beta:files upload --file ./report.pdf
ant files upload --file ./report.pdf
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api
cli-sdks-libraries/cli/quickstart
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cli-sdks-libraries/cli/quickstart
VERSION=1.22.1
VERSION=1.26.1
You can also install the CLI from source using `go install`. Requires Go 1.22 or later.
You can also install the CLI from source using `go install`. Requires Go 1.25 or later.
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api
build-with-claude/vision
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build-with-claude/vision
-H "anthropic-beta: files-api-2025-04-14" \
-H "anthropic-beta: files-api-2025-04-14" \
FILE_ID=$(ant beta:files upload \
FILE_ID=$(ant files upload \
ant beta:messages create \
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build-with-claude/skills-guide
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build-with-claude/skills-guide
* [Skill Management API Reference](https://platform.claude.com/docs/en/api/beta/skills/list) - CRUD operations for Skills
* [Skill Versions API Reference](https://platform.claude.com/docs/en/api/beta/skills/versions/list) - Version management
* [Skill Management API Reference](https://platform.claude.com/docs/en/api/skills/list) - CRUD operations for Skills
* [Skill Versions API Reference](https://platform.claude.com/docs/en/api/skills/versions/list) - Version management
| Aspect | Anthropic Skills | Custom Skills |
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build-with-claude/pdf-support
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build-with-claude/pdf-support
For PDFs you'll use repeatedly, or when you want to avoid encoding overhead, use the [Files API](https://platform.claude.com/docs/en/build-with-claude/files). These examples send t
For PDFs you'll use repeatedly, or when you want to avoid encoding overhead, use the [Files API](https://platform.claude.com/docs/en/build-with-claude/files):
-H "anthropic-beta: files-api-2025-04-14" \
-H "anthropic-beta: files-api-2025-04-14" \
FILE_ID=$(ant beta:files upload \
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build-with-claude/files
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build-with-claude/files
The Files API lets you upload and manage files to use with the Claude API without re-uploading content with each request. This is particularly useful when using the [code execution
The Files API lets you upload and manage files to use with the Claude API without re-uploading content with each request. This is particularly useful when using the [code execution
Requests to the Files API endpoints (`/v1/files`) don't need a beta header, and neither do Messages or Message Batches requests that reference an uploaded file. Two things to kno
* **Referencing a file from the Messages API.** Requests that use an uploaded file as a `document` or `image` source, or in a `container_upload` block for the code execution tool
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build-with-claude/claude-platform-on-aws
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build-with-claude/claude-platform-on-aws
* **Billing** moves to AWS Marketplace: usage is billed in Claude Consumption Units rather than prepaid credits (see [Billing](https://platform.claude.com/docs/en/build-with-claude
* **Billing** moves to AWS Marketplace: usage is billed in Claude Consumption Units rather than prepaid credits (see [Billing](https://platform.claude.com/docs/en/build-with-claude
implementation("com.anthropic:anthropic-java-aws:2.53.0")
implementation("com.anthropic:anthropic-java-aws:2.57.0")
<version>2.53.0</version>
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build-with-claude/claude-on-vertex-ai
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build-with-claude/claude-on-vertex-ai
implementation("com.anthropic:anthropic-java:2.53.0")
implementation("com.anthropic:anthropic-java-vertex:2.53.0")
implementation("com.anthropic:anthropic-java:2.57.0")
implementation("com.anthropic:anthropic-java-vertex:2.57.0")
<version>2.53.0</version>
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build-with-claude/claude-on-amazon-bedrock-legacy
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build-with-claude/claude-on-amazon-bedrock-legacy
implementation("com.anthropic:anthropic-java-bedrock:2.53.0")
implementation("com.anthropic:anthropic-java-bedrock:2.57.0")
<version>2.53.0</version>
<version>2.57.0</version>
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build-with-claude/claude-in-microsoft-foundry
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build-with-claude/claude-in-microsoft-foundry
implementation("com.anthropic:anthropic-java-foundry:2.53.0")
implementation("com.anthropic:anthropic-java-foundry:2.57.0")
<version>2.53.0</version>
<version>2.57.0</version>
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api
build-with-claude/claude-in-amazon-bedrock
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build-with-claude/claude-in-amazon-bedrock
implementation("com.anthropic:anthropic-java-bedrock:2.53.0")
implementation("com.anthropic:anthropic-java-bedrock:2.57.0")
<version>2.53.0</version>
<version>2.57.0</version>
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build-with-claude/citations
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build-with-claude/citations
These examples reference the uploaded file as a `document` source. They use the SDK `beta` client path and send the `anthropic-beta: files-api-2025-04-14` header, which the A
These examples reference the uploaded file as a `document` source, and no beta header is required. See [Files API](https://platform.claude.com/docs/en/build-with-claude/files
-H "anthropic-beta: files-api-2025-04-14" \
ant beta:messages create --beta files-api-2025-04-14 <<YAML
ant messages create <<YAML
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api/skills/versions/retrieve
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api/rate-limits
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api/rate-limits
**[Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws):** Spend limits work differently on Claude Platform on AWS. See [Spend li
</Note>
Each of the Start, Build, and Scale tiers carries a monthly spend cap, which is the maximum your organization can spend on the API each calendar month. Once you reach your tier's s
**[Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws):** The same monthly spend caps apply, and requests stop at the cap in the
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api
api/overview
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api/overview
* **[Files API](https://platform.claude.com/docs/en/api/beta/files/upload)**: Upload and manage files for use across multiple API calls (`POST /v1/files`, `GET /v1/files`)
* **[Skills API](https://platform.claude.com/docs/en/api/skills/create-skill)**: Create and manage custom agent skills (`POST /v1/skills`, `GET /v1/skills`)
* **[Files API](https://platform.claude.com/docs/en/api/files/upload)**: Upload and manage files for use across multiple API calls (`POST /v1/files`, `GET /v1/files`)
* **[Skills API](https://platform.claude.com/docs/en/api/skills/create)**: Create and manage custom agent skills (`POST /v1/skills`, `GET /v1/skills`)
Some list endpoints use a different cursor scheme. The [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing), the [Models API](https://pla
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api
api/models/retrieve
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api/models/retrieve
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
- `"user-profiles-2026-08-18"`
"id": "claude-opus-4-6",
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api/models/list
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api/models/list
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
- `"user-profiles-2026-08-18"`
"id": "claude-opus-4-6",
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api
api/models
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api/models
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
- `"user-profiles-2026-08-18"`
"id": "claude-opus-4-6",
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api
api/messages/create
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api/messages/create
- `ImageBlockParam object { source, type, cache_control }`
- `source: Base64ImageSource or URLImageSource`
- `ImageBlockParam object { source, type, cache_control, transformations }`
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api/messages/count_tokens
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api/messages/count_tokens
- `ImageBlockParam object { source, type, cache_control }`
- `source: Base64ImageSource or URLImageSource`
- `ImageBlockParam object { source, type, cache_control, transformations }`
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