244 pages for preview.
Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it.
TypeScript SDK V2 session API (removed)
Claude Code CLI · path
agent-sdk/typescript-v2-preview
glossary
Claude Developer Platform · in the page
about-claude/glossary
…model and the language. Claude 4.7 and later models and Claude Mythos Preview use a newer tokenizer that produces approximately 30 percent more tokens for the same text than earlier models, on which a…
model-deprecations
Claude Developer Platform · in the page
about-claude/model-deprecations
…| Not sooner than June 9, 2027 | | claude-mythos-preview | Deprecated | June 9, 2026 | To be announced | | claude-opus-5-5 | Active…
Or, for the model with the same capabilities and no access approval requirement:
Claude Developer Platform · in the page
about-claude/models/migration-guide
…## Migrating to Claude Mythos 5 and Claude Fable 5 from Claude Mythos Preview [Claude Mythos 5](https://anthropic.com/glasswing) is the access-gated successor to [Claude Mythos Preview](https://anthr…
pricing
Claude Developer Platform · in the page
about-claude/pricing
…eprecations) for more. Claude 4.7 and later models and Claude Mythos Preview use a newer tokenizer that contributes to their improved performance on a wide range of tasks. This tokenizer produces app…
commerce-agents
Claude Developer Platform · in the page
about-claude/use-case-guides/commerce-agents
…e changes and promotions within the store's guardrails, with a margin preview. * Draft marketing campaigns with audiences, placements, and budget. Its five skills cover performance insights, inventor…
PDF Processing
Claude Developer Platform · in the page
agents-and-tools/agent-skills/best-practices
…g nested references, Claude might use commands such as `head -100` to preview content rather than reading entire files, resulting in incomplete information. **Keep references one level deep from `SKI…
claude-api-skill
Claude Developer Platform · in the page
agents-and-tools/agent-skills/claude-api-skill
…ack-credit retry), and updating fallback code written against earlier preview shapes As it edits, the skill explains each change and its motivation inline. On completion, it produces a checklist of i…
concepts
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/concepts
…, and the connection model. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> This page defines the terms used throughout t…
console
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/console
…ts from the Claude Console. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> This page covers the Console side of an MCP t…
Edit docker-compose.yaml: increment the integer in the setup service's
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/deploy-compose
…a VM using Docker Compose. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> This guide deploys the [tunnel stack](https:/…
deploy-helm
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/deploy-helm
…g the Anthropic Helm chart. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> The Anthropic Helm chart installs the [tunnel…
overview
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/overview
…pic's IP ranges on your origin. <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. They are provided "as-is" without any uptime, support,…
quickstart
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/quickstart
…Docker Compose deployment. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> This quickstart shows you how to set up a tun…
reference
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/reference
…s, and the setup component. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> ## Proxy configuration The [proxy](https://p…
security
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/security
…for MCP tunnel deployments. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> The tunnel architecture provides strong defau…
troubleshooting
Claude Developer Platform · in the page
agents-and-tools/mcp-tunnels/troubleshooting
…g issues in a tunnel stack. --- <Note> MCP tunnels are in research preview. [Request access](https://claude.com/form/mcp-tunnels) to try them. </Note> A request through the tunnel can fail at one…
bash-tool
Claude Developer Platform · in the page
agents-and-tools/tool-use/bash-tool
…------------------- | | Claude 4.7 and later models and Claude Mythos Preview | 325 tokens | | Claude 4.6 and earlier models | 244 tokens | Additiona…
code-execution-tool
Claude Developer Platform · in the page
agents-and-tools/tool-use/code-execution-tool
…behave like `code_execution_20250825` there. - For [Claude Mythos Preview](https://anthropic.com/glasswing), code execution is supported on the Claude API and Microsoft Foundry. --- Claude can an…
text-editor-tool
Claude Developer Platform · in the page
agents-and-tools/tool-use/text-editor-tool
…`text_editor_20250728` (Claude 4.7 and later models and Claude Mythos Preview) | 974 tokens | | `text_editor_20250728` (Claude 4.6 and earlier models) | 745 tokens…
web-fetch-tool
Claude Developer Platform · in the page
agents-and-tools/tool-use/web-fetch-tool
…ring is available with Claude 4.6 and later models and [Claude Mythos Preview](https://anthropic.com/glasswing). `web_fetch_20260318` also adds [response inclusion](https://platform.claude.com/docs/en…
web-search-tool
Claude Developer Platform · in the page
agents-and-tools/tool-use/web-search-tool
…ring is available with Claude 4.6 and later models and [Claude Mythos Preview](https://anthropic.com/glasswing). Three versions of the web search tool are available: * `web_search_20250305`: basic w…
Beta
Claude Developer Platform · in the page
api/beta
…-running agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. V…
Dreams
Claude Developer Platform · in the page
api/beta/dreams
…into the input memory store instead. The Dreams API is in research preview: the request and response shapes are volatile and may change without the deprecation period that applies to generally-avai…
Archive a Dream
Claude Developer Platform · in the page
api/beta/dreams/archive
…into the input memory store instead. The Dreams API is in research preview: the request and response shapes are volatile and may change without the deprecation period that applies to generally-avai…
Cancel a Dream
Claude Developer Platform · in the page
api/beta/dreams/cancel
…into the input memory store instead. The Dreams API is in research preview: the request and response shapes are volatile and may change without the deprecation period that applies to generally-avai…
Create a Dream
Claude Developer Platform · in the page
api/beta/dreams/create
…into the input memory store instead. The Dreams API is in research preview: the request and response shapes are volatile and may change without the deprecation period that applies to generally-avai…
Get a Dream
Claude Developer Platform · in the page
api/beta/dreams/retrieve
…into the input memory store instead. The Dreams API is in research preview: the request and response shapes are volatile and may change without the deprecation period that applies to generally-avai…
Messages
Claude Developer Platform · in the page
api/beta/messages
…-running agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. V…
Batches
Claude Developer Platform · in the page
api/beta/messages/batches
…ning agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-…
Create a Message Batch
Claude Developer Platform · in the page
api/beta/messages/batches/create
…ning agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-…
Retrieve Message Batch results
Claude Developer Platform · in the page
api/beta/messages/batches/results
…unning agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5.…
Count tokens in a Message
Claude Developer Platform · in the page
api/beta/messages/count_tokens
…-running agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. V…
Create a Message
Claude Developer Platform · in the page
api/beta/messages/create
…-running agents and coding - `"claude-mythos-preview"` **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. V…
Spend Limits
Claude Developer Platform · in the page
api/beta/organization/spend_limits
…nd always carry an amount. Setting those limits is in an early access preview. To request access, contact your Anthropic account team. ### Headers - `"anthropic-version": optional string` The ver…
Delete Spend Limit
Claude Developer Platform · in the page
api/beta/organization/spend_limits/delete
…ganization and workspace limits through the API is in an early access preview. ## Path parameters - `spend_limit_id: string` ID of the Spend Limit. ## Headers - `"anthropic-version": optional s…
List Spend Limits
Claude Developer Platform · in the page
api/beta/organization/spend_limits/list
…ge_tier` limit, come newest first. Listing them is in an early access preview. To request access, contact your Anthropic account team. A Claude Enterprise organization's limits are grouped by scope ty…
Set Spend Limit
Claude Developer Platform · in the page
api/beta/organization/spend_limits/set
…nd always carry an amount. Setting those limits is in an early access preview. To request access, contact your Anthropic account team. ## Headers - `"anthropic-version": optional string` The vers…
Events
Claude Developer Platform · in the page
api/beta/sessions/events
…ces no final event — its terminal `span.model_request_end` closes the preview. Accepts one or more event types to preview and may be repeated: `agent.message` streams `content_delta` fragments; `agent…
Stream Events
Claude Developer Platform · in the page
api/beta/sessions/events/stream
…ces no final event — its terminal `span.model_request_end` closes the preview. Accepts one or more event types to preview and may be repeated: `agent.message` streams `content_delta` fragments; `agent…
Threads
Claude Developer Platform · in the page
api/beta/sessions/threads
…te changed it. - `BetaManagedAgentsStartEvent object` Opens a preview of a buffered event. Carries the previewed event's type and id only. Followed by zero or more event_delta events with the…
Events
Claude Developer Platform · in the page
api/beta/sessions/threads/events
…ces no final event — its terminal `span.model_request_end` closes the preview. Accepts one or more event types to preview and may be repeated: `agent.message` streams `content_delta` fragments; `agent…
Stream Session Thread Events
Claude Developer Platform · in the page
api/beta/sessions/threads/events/stream
…ces no final event — its terminal `span.model_request_end` closes the preview. Accepts one or more event types to preview and may be repeated: `agent.message` streams `content_delta` fragments; `agent…
Tunnels
Claude Developer Platform · in the page
api/beta/tunnels
…Create Tunnel **POST** `/v1/tunnels` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…
Archive Tunnel
Claude Developer Platform · in the page
api/beta/tunnels/archive
…T** `/v1/tunnels/{tunnel_id}/archive` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…
Certificates
Claude Developer Platform · in the page
api/beta/tunnels/certificates
…/v1/tunnels/{tunnel_id}/certificates` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…
Archive Tunnel Certificate
Claude Developer Platform · in the page
api/beta/tunnels/certificates/archive
…ertificates/{certificate_id}/archive` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…
Create Tunnel Certificate
Claude Developer Platform · in the page
api/beta/tunnels/certificates/create
…/v1/tunnels/{tunnel_id}/certificates` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…
List Tunnel Certificates
Claude Developer Platform · in the page
api/beta/tunnels/certificates/list
…/v1/tunnels/{tunnel_id}/certificates` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…
Get Tunnel Certificate
Claude Developer Platform · in the page
api/beta/tunnels/certificates/retrieve
…el_id}/certificates/{certificate_id}` The Tunnels API is in research preview. It requires the `anthropic-beta: mcp-tunnels-2026-06-22` header and may change without a deprecation period. It supersede…