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Delete chat Claude Developer Platform · in the page api/compliance/apps/chats/delete …hats/{claude_chat_id}` Permanently deletes a chat and all associated messages and files. This is a destructive operation that cannot be undone. A chat's remote sessions are deleted first. If that de… Files Claude Developer Platform · in the page api/compliance/apps/chats/files …s/{claude_file_id}` Retrieves metadata for a file referenced in chat messages, without downloading the file content. Use the sibling `/content` endpoint to download the bytes. ### Path parameters -… Download file content Claude Developer Platform · in the page api/compliance/apps/chats/files/download …}/content` Downloads the binary content of a file referenced in chat messages. ## Path parameters - `claude_file_id: string` The file ID (tagged ID, e.g., claude_file_abc123) ## Headers - `"an… Get file metadata Claude Developer Platform · in the page api/compliance/apps/chats/files/retrieve …s/{claude_file_id}` Retrieves metadata for a file referenced in chat messages, without downloading the file content. Use the sibling `/content` endpoint to download the bytes. ## Path parameters -… Generated Files Claude Developer Platform · in the page api/compliance/apps/chats/generated_files …nerated-file id (e.g., 'claude_gen_file_abc123') as returned in `chat_messages[].generated_files[].id` from GET /apps/chats/{claude_chat_id}/messages. ### Headers - `"anthropic-version": optional st… Download a Claude-generated file Claude Developer Platform · in the page api/compliance/apps/chats/generated_files/download …nerated-file id (e.g., 'claude_gen_file_abc123') as returned in `chat_messages[].generated_files[].id` from GET /apps/chats/{claude_chat_id}/messages. ## Headers - `"anthropic-version": optional str… Get Claude-generated file metadata Claude Developer Platform · in the page api/compliance/apps/chats/generated_files/retrieve …nerated-file id (e.g., 'claude_gen_file_abc123') as returned in `chat_messages[].generated_files[].id` from GET /apps/chats/{claude_chat_id}/messages. ## Headers - `"anthropic-version": optional str… List chats Claude Developer Platform · in the page api/compliance/apps/chats/list …th `order_by=updated_at` returns a chat again after it receives a new message, is moved into or out of a project, or is deleted in claude.ai. A chat is not guaranteed to be returned again after other… Sessions Claude Developer Platform · in the page api/compliance/apps/sessions …ence calls than the service can return for one session (100,000). The messages endpoint then returns only the session's earliest calls, up to that many, and ends before the session does; `updated_at`… Local Claude Developer Platform · in the page api/compliance/apps/sessions/local …ence calls than the service can return for one session (100,000). The messages endpoint then returns only the session's earliest calls, up to that many, and ends before the session does; `updated_at`… List local sessions Claude Developer Platform · in the page api/compliance/apps/sessions/local/list …ence calls than the service can return for one session (100,000). The messages endpoint then returns only the session's earliest calls, up to that many, and ends before the session does; `updated_at`… Retrieve a local session Claude Developer Platform · in the page api/compliance/apps/sessions/local/retrieve …ence calls than the service can return for one session (100,000). The messages endpoint then returns only the session's earliest calls, up to that many, and ends before the session does; `updated_at`… Remote Claude Developer Platform · in the page api/compliance/apps/sessions/remote …rries session metadata only; retrieve a session's transcript from the messages endpoint. By default the list spans every such organization; pass up to 500 `organization_ids[]` values to narrow it. Pas… List remote sessions Claude Developer Platform · in the page api/compliance/apps/sessions/remote/list …rries session metadata only; retrieve a session's transcript from the messages endpoint. By default the list spans every such organization; pass up to 500 `organization_ids[]` values to narrow it. Pas… errors Claude Developer Platform · in the page api/errors …The request timed out while processing. Consider using the [streaming Messages API](https://platform.claude.com/docs/en/build-with-claude/streaming) for long-running requests. See [Long requests](http… Before Claude Developer Platform · in the page api/migration-2026-10-21 …26-10-21`: ```bash curl https://api.anthropic.com/v1/messages \ -H "x-api-key: $ANTHROPIC_API_KEY" \ -H "anthropic-version: 2026-10-21" \ -H "content-typ… spans Claude Developer Platform · in the page api/opentelemetry/spans ….path` | `string` | The URL's path, for example `/v1/messages`.… Organization Claude Developer Platform · in the page api/organization …s is `success` if the roundtrip succeeded, or `failure` with an error message if it failed or timed out. #### Path parameters - `external_key_id: string` ID of the External Key. maxLength: 204… External Keys Claude Developer Platform · in the page api/organization/external_keys …s is `success` if the roundtrip succeeded, or `failure` with an error message if it failed or timed out. ### Path parameters - `external_key_id: string` ID of the External Key. maxLength: 2048… Validate External Key Claude Developer Platform · in the page api/organization/external_keys/validate …s is `success` if the roundtrip succeeded, or `failure` with an error message if it failed or timed out. ## Path parameters - `external_key_id: string` ID of the External Key. maxLength: 2048… Rate Limits Claude Developer Platform · in the page api/organization/rate_limits …ganization Rate Limits **GET** `/v1/organizations/rate_limits` List Messages API rate limits for your organization. Each entry corresponds to one rate-limit group (either a model family or an API-s… List Organization Rate Limits Claude Developer Platform · in the page api/organization/rate_limits/list …ganization Rate Limits **GET** `/v1/organizations/rate_limits` List Messages API rate limits for your organization. Each entry corresponds to one rate-limit group (either a model family or an API-s… Workspaces Claude Developer Platform · in the page api/organization/workspaces …chGroup object` - `type: "batch"` Always `batch`: the Message Batches API. default: batch - `id: string` Opaque identifier of the rate-limit group (for example… Rate Limits Claude Developer Platform · in the page api/organization/workspaces/rate_limits …chGroup object` - `type: "batch"` Always `batch`: the Message Batches API. default: batch - `id: string` Opaque identifier of the rate-limit group (for example… List Workspace Rate Limits Claude Developer Platform · in the page api/organization/workspaces/rate_limits/list …chGroup object` - `type: "batch"` Always `batch`: the Message Batches API. default: batch - `id: string` Opaque identifier of the rate-limit group (for example… Set Workspace Rate Limits Claude Developer Platform · in the page api/organization/workspaces/rate_limits/update …chGroup object` - `type: "batch"` Always `batch`: the Message Batches API. default: batch - `id: string` Opaque identifier of the rate-limit group (for example… overview Claude Developer Platform · in the page api/overview …d](https://platform.claude.com/docs/en/get-started) and [Working with Messages](https://platform.claude.com/docs/en/build-with-claude/working-with-messages). For managed agent infrastructure, see the… rate-limits Claude Developer Platform · in the page api/rate-limits …"type": "error", "error": { "type": "rate_limit_error", "message": "You have reached your API usage limits: your organization has crossed its monthly API usage threshold, set based on you… service-tiers Claude Developer Platform · in the page api/service-tiers …eter: <CodeGroup> ```bash cURL curl https://api.anthropic.com/v1/messages \ -H "x-api-key: $ANTHROPIC_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -H "content-type: application/jso… User Profiles Claude Developer Platform · in the page api/user_profiles …product or a company that the platform resells Claude access to. A Messages, Message Batches or token counting request can send a profile's `id` in the `anthropic-user-profile-id` header to attribu… Create User Profile Claude Developer Platform · in the page api/user_profiles/create …product or a company that the platform resells Claude access to. A Messages, Message Batches or token counting request can send a profile's `id` in the `anthropic-user-profile-id` header to attribu… Get User Profile Claude Developer Platform · in the page api/user_profiles/retrieve …product or a company that the platform resells Claude access to. A Messages, Message Batches or token counting request can send a profile's `id` in the `anthropic-user-profile-id` header to attribu… Update User Profile Claude Developer Platform · in the page api/user_profiles/update …product or a company that the platform resells Claude access to. A Messages, Message Batches or token counting request can send a profile's `id` in the `anthropic-user-profile-id` header to attribu… versioning Claude Developer Platform · in the page api/versioning …//platform.claude.com/docs/en/api/migration-2026-10-21#upgrade). * Messages API: * A request that places a `document` block directly in an `assistant` message returns a 400 error. * Sendin… cache-diagnostics Claude Developer Platform · in the page build-with-claude/cache-diagnostics …estamp interpolated into your system prompt, or an edit to an earlier message can silently invalidate the cache. Without cache diagnostics, the only signal is `usage.cache_read_input_tokens` dropping… citations Claude Developer Platform · in the page build-with-claude/citations …ample shows how to enable citations on a plain text document with the Messages API: <CodeGroup> ```bash cURL curl https://api.anthropic.com/v1/messages \ -H "content-type: application/json" \… claude-in-amazon-bedrock Claude Developer Platform · in the page build-with-claude/claude-in-amazon-bedrock …ations entirely inside the AWS security boundary while using the same Messages API shape you use with Anthropic's first-party API. <Note> This page covers Claude in Amazon Bedrock, which serves Cla… claude-in-microsoft-foundry Claude Developer Platform · in the page build-with-claude/claude-in-microsoft-foundry …ash cURL curl https://{resource}.services.ai.azure.com/anthropic/v1/messages \ -H "content-type: application/json" \ -H "api-key: YOUR_AZURE_API_KEY" \ -H "anthropic-version: 2023-06-01"… anthropic-managed Claude Developer Platform · in the page build-with-claude/claude-models-on-google-cloud/anthropic-managed …creating and changing workspace resources<br />This includes sending messages and counting tokens. It also includes managing batches, files, skills, and Claude Managed Agents resources. | | `roles/cl… google-managed Claude Developer Platform · in the page build-with-claude/claude-models-on-google-cloud/google-managed …use `:streamRawPredict` instead. A request is nearly identical to a [Messages API](https://platform.claude.com/docs/en/api/messages/create) request. It differs in two main ways: * **Model:** The end… overview Claude Developer Platform · in the page build-with-claude/claude-models-on-google-cloud/overview …rkspace ID.<br />It ends in a Claude API path, such as `.../invoke/v1/messages`.… claude-on-amazon-bedrock-legacy Claude Developer Platform · in the page build-with-claude/claude-on-amazon-bedrock-legacy …dentifiers and AWS event-stream encoding. For models available on the Messages-API Bedrock endpoint, see [Claude in Amazon Bedrock](https://platform.claude.com/docs/en/build-with-claude/claude-in-amaz… claude-platform-on-aws Claude Developer Platform · in the page build-with-claude/claude-platform-on-aws …n AWS gives you the full Anthropic platform experience, including the Messages API, Agent Skills, code execution, and beta features, accessible through your AWS account. Unlike [Amazon Bedrock](https:… compaction-background Claude Developer Platform · in the page build-with-claude/compaction-background …equest-a-summary) with your history as it stands, and record how many messages it held. 2. While that request runs, keep the conversation going on the full history. Append each new turn, don't edit an… compaction-keep-recent-turns Claude Developer Platform · in the page build-with-claude/compaction-keep-recent-turns …s/en/build-with-claude/compaction-on-demand#compact-in-a-loop): which messages go into the compaction request, and what you send after the block. Everything in [Continue from the summary](https://plat… compaction-on-demand Claude Developer Platform · in the page build-with-claude/compaction-on-demand …ts exactly as it came. From then on the block takes the place of the messages it summarizes. It goes first in `messages`, the summarized messages are removed, and your next turn follows it. Claude re… compaction-thinking-blocks Claude Developer Platform · in the page build-with-claude/compaction-thinking-blocks …conversation uses. * **The kept turns directly follow the summarized messages, and you send them unchanged.** Send each kept message exactly as it is in your history. Don't skip or add a message betw… compaction-threshold Claude Developer Platform · in the page build-with-claude/compaction-threshold …mpacted context. On subsequent requests, append the response to your messages. The API automatically drops all content blocks prior to the `compaction` block, continuing the conversation from the sum… context-editing Claude Developer Platform · in the page build-with-claude/context-editing …lues: <CodeGroup> ```bash cURL curl https://api.anthropic.com/v1/messages \ -H "x-api-key: $ANTHROPIC_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -H "content-type: application/jso… context-windows Claude Developer Platform · in the page build-with-claude/context-windows …accumulation:** As the conversation advances through turns, each user message and assistant response accumulates within the context window, and previous turns are preserved completely. * **Context wi…