675 pages for detail.

External Keys Claude Developer Platform · in the page api/organization/external_keys …e: "attached"` default: attached ### External Key Changed Error Details - `ExternalKeyChangedErrorDetails object` The external key changed while the request was validating it. Send the reque… Invites Claude Developer Platform · in the page api/organization/invites …e": "invite_deleted" } ``` ## Domain types ### Already Member Error Details - `AlreadyMemberErrorDetails object` The email address already belongs to a user in the organization. The message name… RBAC Groups Claude Developer Platform · in the page api/organization/rbac_groups …ted. format: date-time ### RBAC Group Grants Owner Access Error Details - `RBACGroupGrantsOwnerAccessErrorDetails object` A role attached to an RBAC Group in the request grants owner access,… Users Claude Developer Platform · in the page api/organization/users …_deleted" } ``` ## Domain types ### Cannot Remove Last Member Error Details - `CannotRemoveLastMemberErrorDetails object` The user is the organization's only member. Add another member before re… Workspaces Claude Developer Platform · in the page api/organization/workspaces …ed"`. - `"global"` - `"us"` ### Key Profile Mismatch Error Details - `KeyProfileMismatchErrorDetails object` The External Key is bound to a user profile, and the Workspace does not have… overview Claude Developer Platform · in the page api/overview …om/docs/en/api/models/list):** List available Claude models and their details (`GET /v1/models`) * **[Files API](https://platform.claude.com/docs/en/api/files/upload):** Upload and manage files for us… rate-limits Claude Developer Platform · in the page api/rate-limits …th-claude/fast-mode) are not available on Claude Platform on AWS. For details, see [Rate limits and quotas on Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platf… service-tiers Claude Developer Platform · in the page api/service-tiers …erview](https://platform.claude.com/docs/en/models/overview) for more details on available models. ## Availability Service tiers are available on select models. ### API support #### [Messages API]… Skills Claude Developer Platform · in the page api/skills …d. format: date-time ### Skill Read Blocked Undecryptable Error Details - `SkillReadBlockedUndecryptableErrorDetails object` A custom skill the request names is stored under an encryption ke… User Profiles Claude Developer Platform · in the page api/user_profiles …company that the platform resells Claude access to. - `external_user_details: optional UserProfileExternalUserDetailsParams` Details about the entity this profile represents, as the platform state… Create User Profile Claude Developer Platform · in the page api/user_profiles/create …company that the platform resells Claude access to. - `external_user_details: optional UserProfileExternalUserDetailsParams` Details about the entity this profile represents, as the platform state… List User Profiles Claude Developer Platform · in the page api/user_profiles/list …pending"` - `"restricted"` - `"banned"` - `external_user_details: UserProfileExternalUserDetails` Details about the entity this profile represents, as the platform states them; not v… Get User Profile Claude Developer Platform · in the page api/user_profiles/retrieve …pending"` - `"restricted"` - `"banned"` - `external_user_details: UserProfileExternalUserDetails` Details about the entity this profile represents, as the platform states them; not v… Update User Profile Claude Developer Platform · in the page api/user_profiles/update …company that the platform resells Claude access to. - `external_user_details: optional UserProfileExternalUserDetailsParams` Details about the entity this profile represents, as the platform state… Message Batches API Claude Developer Platform · in the page build-with-claude/batch-processing …| Not eligible | | Details | 29-day retention; async storage required. [Learn more](https://platform.claude.com/docs/en/build-with-claude/batch-proce… cache-diagnostics Claude Developer Platform · in the page build-with-claude/cache-diagnostics …| Not eligible | | Details | Your prompts and Claude’s outputs are not stored. A fingerprint of cryptographic hashes and token-count estimates is ret… citations Claude Developer Platform · in the page build-with-claude/citations …anaged): stable Microsoft Foundry: stable --- Claude can provide detailed citations when answering questions about documents, helping you track and verify the sources behind each response. All [… claude-in-amazon-bedrock Claude Developer Platform · in the page build-with-claude/claude-in-amazon-bedrock …n Data handling for this offering is governed by Amazon Bedrock. For details, see [Data protection in Amazon Bedrock](https://docs.aws.amazon.com/bedrock/latest/userguide/data-protection.html). ## M… claude-in-microsoft-foundry Claude Developer Platform · in the page build-with-claude/claude-in-microsoft-foundry …docs/en/about-claude/pricing#claude-in-microsoft-foundry-pricing) for details. ## Hosting options Claude models in Microsoft Foundry are available in two hosting options. You choose the hosting opti… anthropic-managed Claude Developer Platform · in the page build-with-claude/claude-models-on-google-cloud/anthropic-managed …setup isn’t complete. An administrator has to finish the organization details form. * **The Usage page shows no data after your first API call:** Usage data can take a few minutes to appear in the Cla… google-managed Claude Developer Platform · in the page build-with-claude/claude-models-on-google-cloud/google-managed …ermission, such as Agent Platform User (`roles/aiplatform.user`). For details, see Google Cloud’s [Agent Platform partner models](https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/… claude-on-amazon-bedrock-legacy Claude Developer Platform · in the page build-with-claude/claude-on-amazon-bedrock-legacy …s://platform.claude.com/docs/en/cli-sdks-libraries/overview) for more details, and the [official Bedrock documentation](https://docs.aws.amazon.com/bedrock/). ### Bearer token authentication You can… claude-platform-on-aws Claude Developer Platform · in the page build-with-claude/claude-platform-on-aws …/platform.claude.com/docs/en/about-claude/pricing#private-offers) for details. <Note> When you use Claude Platform on AWS, Anthropic processes and stores your content (such as prompts and o… sent_count = len(messages sent in the compaction request) Claude Developer Platform · in the page build-with-claude/compaction …g step, which contributes to rate limits and billing. The API returns detailed usage information in the response: ```json Output { "usage": { "input_tokens": 23000, "output_tokens": 1000,… compaction-on-demand Claude Developer Platform · in the page build-with-claude/compaction-on-demand …e same safeguards as your other requests. After a `"refusal"`, [`stop_details`](https://platform.claude.com/docs/en/build-with-claude/handling-stop-reasons#refusal) identifies the policy category behi… compaction-threshold Claude Developer Platform · in the page build-with-claude/compaction-threshold …ull` and the stop reason is `refusal` instead of `compaction`. [`stop_details`](https://platform.claude.com/docs/en/build-with-claude/handling-stop-reasons#refusal) gives the policy category, if there… context-editing Claude Developer Platform · in the page build-with-claude/context-editing …order. 5. **Context to Preserve:** User preferences, domain-specific details, and commitments made. This structure allows Claude to resume work efficiently without losing important context or repeat… context-windows Claude Developer Platform · in the page build-with-claude/context-windows …tform.claude.com/docs/en/build-with-claude/handling-stop-reasons) for details. To stay within context window limits, use the [token counting API](https://platform.claude.com/docs/en/build-with-claude… effort Claude Developer Platform · in the page build-with-claude/effort …gentic work, and for exploratory tasks such as repeated tool calling, detailed web search, and knowledge-base search. Expect meaningfully higher token usage than `high`. * **Max effort:** Reserve for… This will automatically use the environment variable VOYAGE_API_KEY. Claude Developer Platform · in the page build-with-claude/embeddings …yage 4 blog post](https://blog.voyageai.com/2026/01/15/voyage-4/) for details.… extended-thinking Claude Developer Platform · in the page build-with-claude/extended-thinking …ck what a budget actually costs you, monitor the `usage.output_tokens_details.thinking_tokens` field in the response, which reports how many of the billed output tokens were internal reasoning. When s… fallback-credit Claude Developer Platform · in the page build-with-claude/fallback-credit …tep title="Read two fields from the refusal"> On a refusal, `stop_details` includes two fields: * **`fallback_credit_token`:** an opaque string that represents the credit * **`fallback_ha… fast-mode Claude Developer Platform · in the page build-with-claude/fast-mode …ests to a deployment of the fast mode model, and leave out `speed`. details: - Fast mode is in research preview on Claude Opus 5 and deprecated on Claude Opus 4.8, and needs the `fast-mode-2026-… files Claude Developer Platform · in the page build-with-claude/files …| Not eligible | | Details | Files retained until explicitly deleted or they reach their configured expiration. [Learn more](https://platform.claude.… handling-stop-reasons Claude Developer Platform · in the page build-with-claude/handling-stop-reasons …| Claude declined to respond. | Read `stop_details` and [retry on a fallback model](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback).… message-threads Claude Developer Platform · in the page build-with-claude/message-threads …an’t be continued A continue request returns a 404 error with `error.details.error_code` set to `thread_not_found` when the API can’t continue the thread. The response does not say why. The causes in… mid-conversation-system-messages Claude Developer Platform · in the page build-with-claude/mid-conversation-system-messages …clared in `tools` returns a 400 error (on the Claude API, with `error.details.error_code` set to `tool_reference_unresolved`). A `tool_addition` block can instead [carry the tool’s full definition](ht… pdf-support Claude Developer Platform · in the page build-with-claude/pdf-support …| | Details | —… preserved-thinking Claude Developer Platform · in the page build-with-claude/preserved-thinking …m.claude.com/docs/en/build-with-claude/preserved-thinking#enforcement-details) | | Claude Mythos 5.1 | Enforced (400 error) | Enforced (400 error)… Request 2 caches its request content (not the response) Claude Developer Platform · in the page build-with-claude/prompt-caching …g](https://platform.claude.com/docs/en/about-claude/pricing) for full details. </Note> *** ## Supported models Prompt caching (both automatic and explicit) is supported on all [active Claude models… claude-prompting-best-practices Claude Developer Platform · in the page build-with-claude/prompt-engineering/claude-prompting-best-practices …uent and colloquial, less machine-like * **Less verbose:** Might skip detailed summaries for efficiency unless prompted otherwise This means Claude might skip verbal summaries after tool calls, jumpi… prompting-claude-fable-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5 …aude Fable 5 interprets dense technical images, web applications, and detailed screenshots with substantially higher accuracy, often while using fewer output tokens, and is trained to use bash and cro… Delivering work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-1 …lient-side compaction summaries drop constraints, decisions, or exact details: [Tell the model what to preserve in compaction summaries](https://platform.claude.com/docs/en/build-with-claude/prompt-en… Finishing work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-2 …, and keep bullets for lists of separate items. Leave out unnecessary details unless the reader asks and practice concision, but do ensure that your messages have the key context. Aim to make your use… prompting-claude-haiku-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-haiku-5-5 …d request returns a response with `stop_reason: "refusal"`, and `stop_details.category` names the [refusal category](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#refusal… prompting-claude-opus-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5 …should answer "what happened" or "what did you find," with supporting detail after it for readers who want it. ``` To tune narration up, or change its style, the same lever applies in the other direc… prompting-claude-opus-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5-5 …messages) * Answers about dense charts, diagrams, or screenshots miss detail: [Tools for complex visual inputs](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claud… prompting-claude-sonnet-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5 …e model answers from its training knowledge when a search would catch details that have changed: [Tool use in chat and knowledge work](https://platform.claude.com/docs/en/build-with-claude/prompt-engi… refusals-and-fallback Claude Developer Platform · in the page build-with-claude/refusals-and-fallback …rmal response, not an error, with `stop_reason: "refusal"`. Its `stop_details.category` names the policy area (see [What a refusal looks like](https://platform.claude.com/docs/en/build-with-claude/ref… skills-guide Claude Developer Platform · in the page build-with-claude/skills-guide …use successfully. </Card> </CardGroup> ## Overview <Note> For a detailed look at the architecture and real-world applications of Agent Skills, read the engineering blog post: [Equipping agents f…