370 pages for prefix.

Chats Claude Developer Platform · in the page api/compliance/apps/chats …claude_gen_file_abc123', or a file id, e.g. 'claude_file_abc123'; the prefix tells them apart. Download the first from the generated-files content endpoint and the second from the files content endpoi… Messages Claude Developer Platform · in the page api/compliance/apps/chats/messages …claude_gen_file_abc123', or a file id, e.g. 'claude_file_abc123'; the prefix tells them apart. Download the first from the generated-files content endpoint and the second from the files content endpoi… Get chat messages Claude Developer Platform · in the page api/compliance/apps/chats/messages/list …claude_gen_file_abc123', or a file id, e.g. 'claude_file_abc123'; the prefix tells them apart. Download the first from the generated-files content endpoint and the second from the files content endpoi… Sessions Claude Developer Platform · in the page api/compliance/apps/sessions …liance_local_session - `id: string` Local session identifier, prefixed `clls_`. Unique within the parent organization. Treat as an opaque string; the format may change without notice. - `cr… Local Claude Developer Platform · in the page api/compliance/apps/sessions/local …liance_local_session - `id: string` Local session identifier, prefixed `clls_`. Unique within the parent organization. Treat as an opaque string; the format may change without notice. - `cr… List local sessions Claude Developer Platform · in the page api/compliance/apps/sessions/local/list …liance_local_session - `id: string` Local session identifier, prefixed `clls_`. Unique within the parent organization. Treat as an opaque string; the format may change without notice. - `cr… Messages Claude Developer Platform · in the page api/compliance/apps/sessions/local/messages …ance_local_session_message - `id: string` Message identifier, prefixed `clsm_`. Stable for as long as the message's turn is retained: identifiers of retained turns do not change as older turns… Retrieve local session messages Claude Developer Platform · in the page api/compliance/apps/sessions/local/messages/list …ance_local_session_message - `id: string` Message identifier, prefixed `clsm_`. Stable for as long as the message's turn is retained: identifiers of retained turns do not change as older turns… Retrieve a local session Claude Developer Platform · in the page api/compliance/apps/sessions/local/retrieve …compliance_local_session - `id: string` Local session identifier, prefixed `clls_`. Unique within the parent organization. Treat as an opaque string; the format may change without notice. - `crea… Groups Claude Developer Platform · in the page api/compliance/groups …: 500, max: 1000) default: 500, minimum: 1, maximum: 1000 - `name_prefix: optional string` Filter groups by name prefix default: "" - `page: optional string` Opaque pagination token from… List Compliance Groups Claude Developer Platform · in the page api/compliance/groups/list …: 500, max: 1000) default: 500, minimum: 1, maximum: 1000 - `name_prefix: optional string` Filter groups by name prefix default: "" - `page: optional string` Opaque pagination token from… errors Claude Developer Platform · in the page api/errors …ugust 31, 2026, and for any request that sets `thinking.block_binding.prefix_mismatch_behavior` to `"error"`, a replayed block whose earlier history changed is rejected with a 400 `invalid_request_err… Files Claude Developer Platform · in the page api/files …Opaque page cursor returned in a prior list response's `next_page`. Prefixed `page_`. ### Headers - `"anthropic-version": optional string` The version of the Claude API you want to use. Read… List Files Claude Developer Platform · in the page api/files/list …Opaque page cursor returned in a prior list response's `next_page`. Prefixed `page_`. ## Headers - `"anthropic-version": optional string` The version of the Claude API you want to use. Read… Messages Claude Developer Platform · in the page api/messages …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256 - `in… Batches Claude Developer Platform · in the page api/messages/batches …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256… Create a Message Batch Claude Developer Platform · in the page api/messages/batches/create …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256… Retrieve Message Batch results Claude Developer Platform · in the page api/messages/batches/results …Explains why the prompt cache could not fully reuse the prefix from the request identified by `diagnostics.previous_message_id`. `null` means diagnosis is still pending — the response wa… Create a Message Claude Developer Platform · in the page api/messages/create …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256 - `in… Before Claude Developer Platform · in the page api/migration-2026-10-21 …anges the same way, and its classes have the same names with a `Beta` prefix. The JSON that the SDK sends is the same, except that a beta system message now has `role` before `content`. `addUserM… spans Claude Developer Platform · in the page api/opentelemetry/spans …| The block's `type` with the prefix `anthropic_`, such as `anthropic_image`. The part has no other fields. |… Organization Claude Developer Platform · in the page api/organization …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: ExternalKeyAttache… External Keys Claude Developer Platform · in the page api/organization/external_keys …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: ExternalKeyAttache… Create External Key Claude Developer Platform · in the page api/organization/external_keys/create …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: ExternalKeyAttache… List External Keys Claude Developer Platform · in the page api/organization/external_keys/list …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: ExternalKeyAttache… Get External Key Claude Developer Platform · in the page api/organization/external_keys/retrieve …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: ExternalKeyAttache… Update External Key Claude Developer Platform · in the page api/organization/external_keys/update …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: ExternalKeyAttache… Federation Claude Developer Platform · in the page api/organization/federation …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… Rules Claude Developer Platform · in the page api/organization/federation/rules …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… Archive Federation Rule Claude Developer Platform · in the page api/organization/federation/rules/archive …`true`) is rejected with 400. maxLength: 4096 - `subject_prefix: optional string or null` Match the verified JWT `sub` claim. Exact match unless the value ends with `*`, in which c… Create Federation Rule Claude Developer Platform · in the page api/organization/federation/rules/create …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… List Federation Rules Claude Developer Platform · in the page api/organization/federation/rules/list …`true`) is rejected with 400. maxLength: 4096 - `subject_prefix: optional string or null` Match the verified JWT `sub` claim. Exact match unless the value ends with `*`, in which c… Get Federation Rule Claude Developer Platform · in the page api/organization/federation/rules/retrieve …`true`) is rejected with 400. maxLength: 4096 - `subject_prefix: optional string or null` Match the verified JWT `sub` claim. Exact match unless the value ends with `*`, in which c… Update Federation Rule Claude Developer Platform · in the page api/organization/federation/rules/update …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… overview Claude Developer Platform · in the page api/overview …| | `anthropic-workspace-id` | The `wrkspc_`-prefixed ID of the [workspace](https://platform.claude.com/docs/en/manage-claude/workspaces) that the API key or access token reso… User Profiles Claude Developer Platform · in the page api/user_profiles …ile`. - `id: string` Unique identifier for this user profile, prefixed `uprof_`. - `access_type: UserProfileAccessType` How the platform uses the API for this entity: `application` (de… Create User Profile Claude Developer Platform · in the page api/user_profiles/create …ile`. - `id: string` Unique identifier for this user profile, prefixed `uprof_`. - `access_type: UserProfileAccessType` How the platform uses the API for this entity: `application` (de… Delete User Profile Claude Developer Platform · in the page api/user_profiles/delete …eted`. - `id: string` Identifier of the deleted user profile, prefixed `uprof_`. ## Example ```bash curl https://api.anthropic.com/v1/user_profiles/$USER_PROFILE_ID \ -X DELETE \ -H… List User Profiles Claude Developer Platform · in the page api/user_profiles/list …ile`. - `id: string` Unique identifier for this user profile, prefixed `uprof_`. - `access_type: UserProfileAccessType` How the platform uses the API for this entity: `application` (de… Get User Profile Claude Developer Platform · in the page api/user_profiles/retrieve …ile`. - `id: string` Unique identifier for this user profile, prefixed `uprof_`. - `access_type: UserProfileAccessType` How the platform uses the API for this entity: `application` (de… Update User Profile Claude Developer Platform · in the page api/user_profiles/update …ile`. - `id: string` Unique identifier for this user profile, prefixed `uprof_`. - `access_type: UserProfileAccessType` How the platform uses the API for this entity: `application` (de… Message Batches API Claude Developer Platform · in the page build-with-claude/batch-processing …claude/prompt-caching"> Reduce cost and latency by caching prompt prefixes shared across requests in a batch. </Card> </CardGroup> cache-diagnostics Claude Developer Platform · in the page build-with-claude/cache-diagnostics …mparing consecutive requests and identifying exactly where the prompt prefix diverged. featureMetadata: status: ga zdr: eligibility: eligible note: Excludes [Covered Models](https://platfo… claude-in-amazon-bedrock Claude Developer Platform · in the page build-with-claude/claude-in-amazon-bedrock …Model IDs in Claude in Amazon Bedrock carry an `anthropic.` provider prefix. Model capabilities and behaviors are documented on the [Models overview](https://platform.claude.com/docs/en/models/overvi… claude-on-amazon-bedrock-legacy Claude Developer Platform · in the page build-with-claude/claude-on-amazon-bedrock-legacy …e base model ID. The inference profile ID is the base model ID with a prefix from a column marked "Yes" in the following table, for example us.anthropic.claude-sonnet-4-5-20250929-v1:0. You can also p… claude-platform-on-aws Claude Developer Platform · in the page build-with-claude/claude-platform-on-aws …rst-party Claude API. There are no Bedrock-style ARNs or `anthropic.` prefixes. New models typically launch on Claude Platform on AWS the same day as the first-party Claude API. <Tip> Upgrading to… sent_count = len(messages sent in the compaction request) Claude Developer Platform · in the page build-with-claude/compaction …re-insert after the compaction block, or send `thinking.block_binding.prefix_mismatch_behavior: "drop_block"` with the `thinking-binding-controls-2026-08-01` [beta header](https://platform.claude.com/… compaction-thinking-blocks Claude Developer Platform · in the page build-with-claude/compaction-thinking-blocks …r dropped thinking blocks if the request sets `thinking.block_binding.prefix_mismatch_behavior` to `"drop_block"`. In the Message Batches API, an item that leaves the field unset doesn't fail. Where t… compaction-threshold Claude Developer Platform · in the page build-with-claude/compaction-threshold …re-insert after the compaction block, or send `thinking.block_binding.prefix_mismatch_behavior: "drop_block"` with the `thinking-binding-controls-2026-08-01` [beta header](https://platform.claude.com/… context-editing Claude Developer Platform · in the page build-with-claude/context-editing …d block is rejected unless you opt into dropping it. See [Keeping the prefix unchanged](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#prefix-check). ### Context editing and…