186 pages for refused.

Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …he full set. You are not billed for the input tokens of a request refused before any output is generated. When a classifier fires mid-stream, the input and already-streamed output are billed; disc… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence …lone at 91% with refusals counted as wrong, but only because Opus 5.5 refused six biology questions per run compared with Sonnet 5.5’s one. On the questions each answered, Opus 5.5 led by about 2 poin… browser-use-sdk Claude Developer Platform · in the page agents-and-tools/tool-use/browser-use-sdk …ipt: `browserState`) after each call that returns a result, including refused and failed calls. Return every open tab, and what changed since the last report: * Opened tabs and download events * A `B… browser-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/browser-use-tool …d` doesn’t. Other common cases: <AccordionGroup> <Accordion title="Refused navigation scheme"> ```json { "type": "tool_result", "tool_use_id": "toolu_01LeUTyqkhRxBFq1QTG3pkwN",… Beta Claude Developer Platform · in the page api/beta …rom a prior refusal's `stop_details`. When a preceding request was refused and returned a `fallback_credit_token`, pass that code here on the retry to have the retry's cache-creation tokens for… Work Claude Developer Platform · in the page api/beta/environments/work …has been none - `lease_extended: boolean` Always false: a refused heartbeat does not extend the lease - `state: "queued" or "starting" or "active" or 2 more` Current state of t… Messages Claude Developer Platform · in the page api/beta/messages …rom a prior refusal's `stop_details`. When a preceding request was refused and returned a `fallback_credit_token`, pass that code here on the retry to have the retry's cache-creation tokens for… Batches Claude Developer Platform · in the page api/beta/messages/batches …a prior refusal's `stop_details`. When a preceding request was refused and returned a `fallback_credit_token`, pass that code here on the retry to have the retry's cache-creation tokens… Create a Message Batch Claude Developer Platform · in the page api/beta/messages/batches/create …a prior refusal's `stop_details`. When a preceding request was refused and returned a `fallback_credit_token`, pass that code here on the retry to have the retry's cache-creation tokens… Retrieve Message Batch results Claude Developer Platform · in the page api/beta/messages/batches/results …Opaque code that refunds the cache-miss cost when retrying this refused request on the fallback model. Pass it as `fallback_credit_token` on the retry request. Expires 5… Create a Message Claude Developer Platform · in the page api/beta/messages/create …rom a prior refusal's `stop_details`. When a preceding request was refused and returned a `fallback_credit_token`, pass that code here on the retry to have the retry's cache-creation tokens for… Organization Claude Developer Platform · in the page api/beta/organization …owner, a member with owner permissions, or a membership admin may be refused. A refused request returns a `400` or `403` error that says why. If the request returns `503`, send it again to finish; an… Claude Tag Claude Developer Platform · in the page api/beta/organization/claude_tag …y a channel takes one: an update of a workspace that sends a value is refused, and one that sends null changes nothing. Null never clears it: sent to a channel that stores none it changes nothing, and… Slack Channels Claude Developer Platform · in the page api/beta/organization/claude_tag/slack_channels …channel up and applying `settings` are two steps: when the second is refused, the response is the refusal, the channel stays set up with every setting unset, and the error's `details.slack_channel_id… Set Up Slack Channel Claude Developer Platform · in the page api/beta/organization/claude_tag/slack_channels/create …channel up and applying `settings` are two steps: when the second is refused, the response is the refusal, the channel stays set up with every setting unset, and the error's `details.slack_channel_id… Remove Slack Channel Claude Developer Platform · in the page api/beta/organization/claude_tag/slack_channels/delete …. The channel in Slack and its messages are unchanged. The request is refused with 400 and `error.details.error_code` `slack_channel_enabled` while `enabled` resolves to `true` for the channel, as a r… Update Slack Channel Claude Developer Platform · in the page api/beta/organization/claude_tag/slack_channels/update …sent as null is cleared, so the channel inherits it. If any value is refused, no setting in the request is stored. A group direct message takes no settings and returns 400. ## Path parameters - `id… Slack Workspaces Claude Developer Platform · in the page api/beta/organization/claude_tag/slack_workspaces …ent as null is cleared, so the workspace inherits it. If any value is refused, no setting in the request is stored. ### Path parameters - `id: string` The workspace's identifier, starting with `s… Update Slack Workspace Claude Developer Platform · in the page api/beta/organization/claude_tag/slack_workspaces/update …ent as null is cleared, so the workspace inherits it. If any value is refused, no setting in the request is stored. ## Path parameters - `id: string` The workspace's identifier, starting with `sl… Plugin Marketplaces Claude Developer Platform · in the page api/beta/organization/plugin_marketplaces …is missing, private, or has no such branch or commit is reported, not refused: the response is a report with `valid: false`. Plugin sources outside the marketplace are fetched anonymously from GitHub,… Validate Plugin Marketplace Archive Claude Developer Platform · in the page api/beta/organization/plugin_marketplaces/validate_archive …out. An archive that cannot be read as a marketplace is reported, not refused: the response is a report with `valid: false`. Plugin sources outside the marketplace are fetched anonymously from GitHub,… Validate Plugin Marketplace Repository Claude Developer Platform · in the page api/beta/organization/plugin_marketplaces/validate_repository …is missing, private, or has no such branch or commit is reported, not refused: the response is a report with `valid: false`. Plugin sources outside the marketplace are fetched anonymously from GitHub,… Plugins Claude Developer Platform · in the page api/beta/organization/plugins …`. A Plugin going into the organization's library marketplace is also refused with a 409 when one of its skills has the name of an organization skill that this API does not list: `error_code` `skill_n… Create Plugin Claude Developer Platform · in the page api/beta/organization/plugins/create …`. A Plugin going into the organization's library marketplace is also refused with a 409 when one of its skills has the name of an organization skill that this API does not list: `error_code` `skill_n… Update Plugin Claude Developer Platform · in the page api/beta/organization/plugins/update …ing enabled, a version whose `content_scan.status` is `processing` is refused with a 409 (`error_code` `scan_pending`; retry once the scan finishes). A version whose `content_scan.status` is `errored`… Versions Claude Developer Platform · in the page api/beta/organization/plugins/versions …with the name of an organization skill that this API does not list is refused with a 409: `error_code` `skill_name_taken`, with that name in `details.skill_name`. A 503 with `error_code` `registration… Create Plugin Version Claude Developer Platform · in the page api/beta/organization/plugins/versions/create …with the name of an organization skill that this API does not list is refused with a 409: `error_code` `skill_name_taken`, with that name in `details.skill_name`. A 503 with `error_code` `registration… Users Claude Developer Platform · in the page api/beta/organization/users …owner, a member with owner permissions, or a membership admin may be refused. A refused request returns a `400` or `403` error that says why. If the request returns `503`, send it again to finish; an… Sign Out User Claude Developer Platform · in the page api/beta/organization/users/sign_out …owner, a member with owner permissions, or a membership admin may be refused. A refused request returns a `400` or `403` error that says why. If the request returns `503`, send it again to finish; an… Events Claude Developer Platform · in the page api/beta/sessions/events …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… List Events Claude Developer Platform · in the page api/beta/sessions/events/list …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… Stream Events Claude Developer Platform · in the page api/beta/sessions/events/stream …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… Threads Claude Developer Platform · in the page api/beta/sessions/threads …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… Events Claude Developer Platform · in the page api/beta/sessions/threads/events …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… List Session Thread Events Claude Developer Platform · in the page api/beta/sessions/threads/events/list …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… Stream Session Thread Events Claude Developer Platform · in the page api/beta/sessions/threads/events/stream …h the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluat… Compliance API Claude Developer Platform · in the page api/compliance …same cause may be reported once until the cause changes, and requests refused before a token exchange is attempted are not reported, except the "connector_scope_not_granted" and "identity_assertion_re… Activities Claude Developer Platform · in the page api/compliance/activities …same cause may be reported once until the cause changes, and requests refused before a token exchange is attempted are not reported, except the "connector_scope_not_granted" and "identity_assertion_re… Query compliance activities Claude Developer Platform · in the page api/compliance/activities/list …same cause may be reported once until the cause changes, and requests refused before a token exchange is attempted are not reported, except the "connector_scope_not_granted" and "identity_assertion_re… External Keys Claude Developer Platform · in the page api/organization/external_keys …The External Key failed Anthropic's validation, so the request was refused. The message gives the reason, if there is one. - `error_code: "external_key_validation_failed"` ### External Key Vali… Message Batches API Claude Developer Platform · in the page build-with-claude/batch-processing …-fallback)) | Server-side fallback doesn’t apply to batches. To retry refused requests, see [Refusals in Message Batches](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#re… fallback-credit Claude Developer Platform · in the page build-with-claude/fallback-credit …escription: Avoid paying the prompt-cache cost twice when you retry a refused request on another model. featureMetadata: status: beta betaHeader: fallback-credit-2026-07-01, server-side-fallback-2… handling-stop-reasons Claude Developer Platform · in the page build-with-claude/handling-stop-reasons …op reasons other than `refusal`. You can usually get a response to a refused request by retrying it on another Claude model. This works for Claude Fable 5.2, Claude Fable 5.1, Claude Fable 5, Claude… message-threads Claude Developer Platform · in the page build-with-claude/message-threads …refusal"`, do not continue the thread. The API might already hold the refused turn, and a continue request can’t remove it. Start a new thread with a create request that leaves out or rephrases the tu… overview Claude Developer Platform · in the page build-with-claude/overview …| A middleware in the Anthropic SDKs that retries a refused request on the fallback models you list. | | ↳ [Fallback… refusals-and-fallback Claude Developer Platform · in the page build-with-claude/refusals-and-fallback …5.5, and Claude Haiku 5.5 return classifier refusals and how to retry refused requests on a fallback model. featureMetadata: supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - cla… search-results Claude Developer Platform · in the page build-with-claude/search-results …ect and handle refusal stop reasons in streaming responses, and retry refused requests on a fallback model. </Card> <Card title="Citations" icon="book" href="https://platform.claude.com/docs/en/b… thinking Claude Developer Platform · in the page build-with-claude/thinking …the model’s internal reasoning as part of the response text might be refused with `stop_details.category: "reasoning_extraction"`. See [What a refusal looks like](https://platform.claude.com/docs/en/… access-transparency-log Claude Developer Platform · in the page manage-claude/access-transparency-log …* An event still pending 24 hours after the run first saw it. * A refused inclusion proof (`400`, `401`, or `403`) for an event the feed served you. * An inclusion proof returned for a different… claude-tag-api Claude Developer Platform · in the page manage-claude/claude-tag-api …inherits it again. * **All or nothing.** If any value in a request is refused, no setting in the request is stored. * **Safe to repeat.** Every change leaves the resource as the first identical reques…