HomeDocs changes
Documentation changes
What the docs quietly changed.
Anthropic's published documentation, fetched on a schedule and diffed against the last copy. Every edit dated, including the ones that never made a release note.
Last poll read all 4 cleanly: Claude Code CLI, Claude Developer Platform, Claude Documentation, Model Context Protocol. A date here is when this site noticed, not when Anthropic edited.
Claude Developer Platform
820pages tracked
773 changed this week · last read 23 Oct 2026
Claude Code CLI
228pages tracked
147 changed this week · last read 23 Oct 2026
Claude Documentation
280pages tracked
81 changed this week · last read 23 Oct 2026
Model Context Protocol
357pages tracked
171 changed this week · last read 23 Oct 2026
100 on this page
10,114 of the ledger's changes in api. Show every change
ReadSourcePageWhatLines
16 Oct 2026
187 pages
+3811 −1432 lines
api
api/rate-limits
±changed
+1−1
apichanged
api/rate-limits
When using [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) with `speed: "fast"` on Claude Opus 5.5, Claude Opus 5, or Opus 4.8, dedicated rate limits a
When using [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) with `speed: "fast"` on Claude Opus 5.5, Claude Opus 5, or Claude Opus 4.8, dedicated rate l
+1 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/messages/create
±changed
+20−1
apichanged
api/messages/create
- `speed: optional "standard" or "fast" or null`
The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
+20 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/messages/count_tokens
±changed
+10−0
apichanged
api/messages/count_tokens
- `speed: optional "standard" or "fast" or null`
The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
+10 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/messages/batches/results
±changed
+8−0
apichanged
api/messages/batches/results
- `speed: "standard" or "fast" or null`
The inference speed mode used for this request.
- `"standard"`
+8 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/messages/batches/create
±changed
+10−0
apichanged
api/messages/batches/create
- `speed: optional "standard" or "fast" or null`
The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
+10 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/messages/batches
±changed
+42−0
apichanged
api/messages/batches
- `speed: optional "standard" or "fast" or null`
The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
+42 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/messages
±changed
+80−1
apichanged
api/messages
- `speed: optional "standard" or "fast" or null`
The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=ht
+80 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps/sessions/local/retrieve
±changed
+1−1
apichanged
api/compliance/apps/sessions/local/retrieve
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bound
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bound
+1 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps/sessions/local/messages/list
±changed
+1−1
apichanged
api/compliance/apps/sessions/local/messages/list
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bou
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bou
+1 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps/sessions/local/messages
±changed
+1−1
apichanged
api/compliance/apps/sessions/local/messages
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bou
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bou
+1 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps/sessions/local/list
±changed
+14−2
apichanged
api/compliance/apps/sessions/local/list
- `gt: optional string`
Only return sessions whose first inference call is strictly after this time (RFC 3339; a UTC offset is required).
format: date-time
+14 −2 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps/sessions/local
±changed
+18−6
apichanged
api/compliance/apps/sessions/local
- `gt: optional string`
Only return sessions whose first inference call is strictly after this time (RFC 3339; a UTC offset is required).
format: date-time
+18 −6 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps/sessions
±changed
+16−4
apichanged
api/compliance/apps/sessions
- `gt: optional string`
Only return sessions whose first inference call is strictly after this time (RFC 3339; a UTC offset is required).
format: date-time
+16 −4 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/apps
±changed
+16−4
apichanged
api/compliance/apps
- `gt: optional string`
Only return sessions whose first inference call is strictly after this time (RFC 3339; a UTC offset is required).
format: date-time
+16 −4 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/activities/list
±changed
+18−2
apichanged
api/compliance/activities/list
- `updates: array of Name or Capabilities or RedactContent or 103 more`
- `updates: array of Name or Capabilities or RedactContent or 104 more`
The Claude Science setting that lets members import projects, sessions, and artifacts saved on their computer under other sign-ins was changed for the organization.
The Claude Science setting that lets members access projects, sessions, and artifacts previously saved on their computer under other sign-ins, and add them to their account
Setting value immediately after this change
+18 −2 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance/activities
±changed
+36−4
apichanged
api/compliance/activities
- `updates: array of Name or Capabilities or RedactContent or 103 more`
- `updates: array of Name or Capabilities or RedactContent or 104 more`
The Claude Science setting that lets members import projects, sessions, and artifacts saved on their computer under other sign-ins was changed for the organization.
The Claude Science setting that lets members access projects, sessions, and artifacts previously saved on their computer under other sign-ins, and add them to their account
- `ArtifactTypeDashboardsEnabled object`
+36 −4 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/compliance
±changed
+34−6
apichanged
api/compliance
- `updates: array of Name or Capabilities or RedactContent or 103 more`
- `updates: array of Name or Capabilities or RedactContent or 104 more`
The Claude Science setting that lets members import projects, sessions, and artifacts saved on their computer under other sign-ins was changed for the organization.
The Claude Science setting that lets members access projects, sessions, and artifacts previously saved on their computer under other sign-ins, and add them to their account
- `ArtifactTypeDashboardsEnabled object`
+34 −6 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/update
±changed
+5−1
apichanged
api/beta/vaults/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/retrieve
±changed
+5−1
apichanged
api/beta/vaults/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/list
±changed
+5−1
apichanged
api/beta/vaults/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/delete
±changed
+5−1
apichanged
api/beta/vaults/delete
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/update
±changed
+5−1
apichanged
api/beta/vaults/credentials/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/retrieve
±changed
+5−1
apichanged
api/beta/vaults/credentials/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/mcp_oauth_validate
±changed
+5−1
apichanged
api/beta/vaults/credentials/mcp_oauth_validate
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/list
±changed
+5−1
apichanged
api/beta/vaults/credentials/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/delete
±changed
+5−1
apichanged
api/beta/vaults/credentials/delete
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/create
±changed
+5−1
apichanged
api/beta/vaults/credentials/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials/archive
±changed
+5−1
apichanged
api/beta/vaults/credentials/archive
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/credentials
±changed
+35−7
apichanged
api/beta/vaults/credentials
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+35 −7 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/create
±changed
+5−1
apichanged
api/beta/vaults/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults/archive
±changed
+5−1
apichanged
api/beta/vaults/archive
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/vaults
±changed
+65−13
apichanged
api/beta/vaults
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+65 −13 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/user_profiles/update
±changed
+5−1
apichanged
api/beta/user_profiles/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/user_profiles/retrieve
±changed
+5−1
apichanged
api/beta/user_profiles/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/user_profiles/list
±changed
+5−1
apichanged
api/beta/user_profiles/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/user_profiles/create_enrollment_url
±changed
+5−1
apichanged
api/beta/user_profiles/create_enrollment_url
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/user_profiles/create
±changed
+5−1
apichanged
api/beta/user_profiles/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/user_profiles
±changed
+25−5
apichanged
api/beta/user_profiles
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+25 −5 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/rotate_token
±changed
+5−1
apichanged
api/beta/tunnels/rotate_token
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/reveal_token
±changed
+5−1
apichanged
api/beta/tunnels/reveal_token
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/retrieve
±changed
+5−1
apichanged
api/beta/tunnels/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/list
±changed
+5−1
apichanged
api/beta/tunnels/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/create
±changed
+5−1
apichanged
api/beta/tunnels/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/certificates/retrieve
±changed
+5−1
apichanged
api/beta/tunnels/certificates/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/certificates/list
±changed
+5−1
apichanged
api/beta/tunnels/certificates/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/certificates/create
±changed
+5−1
apichanged
api/beta/tunnels/certificates/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/certificates/archive
±changed
+5−1
apichanged
api/beta/tunnels/certificates/archive
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/certificates
±changed
+20−4
apichanged
api/beta/tunnels/certificates
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+20 −4 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels/archive
±changed
+5−1
apichanged
api/beta/tunnels/archive
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/tunnels
±changed
+50−10
apichanged
api/beta/tunnels
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+50 −10 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/update
±changed
+5−1
apichanged
api/beta/sessions/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads/retrieve
±changed
+5−1
apichanged
api/beta/sessions/threads/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads/list
±changed
+5−1
apichanged
api/beta/sessions/threads/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads/events/stream
±changed
+5−1
apichanged
api/beta/sessions/threads/events/stream
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads/events/list
±changed
+5−1
apichanged
api/beta/sessions/threads/events/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads/events
±changed
+10−2
apichanged
api/beta/sessions/threads/events
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+10 −2 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads/archive
±changed
+5−1
apichanged
api/beta/sessions/threads/archive
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/threads
±changed
+25−5
apichanged
api/beta/sessions/threads
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+25 −5 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/retrieve
±changed
+5−1
apichanged
api/beta/sessions/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/resources/update
±changed
+5−1
apichanged
api/beta/sessions/resources/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/resources/retrieve
±changed
+5−1
apichanged
api/beta/sessions/resources/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/resources/list
±changed
+5−1
apichanged
api/beta/sessions/resources/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/resources/delete
±changed
+5−1
apichanged
api/beta/sessions/resources/delete
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/resources/add
±changed
+5−1
apichanged
api/beta/sessions/resources/add
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/resources
±changed
+25−5
apichanged
api/beta/sessions/resources
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+25 −5 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/list
±changed
+5−1
apichanged
api/beta/sessions/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/events/stream
±changed
+5−1
apichanged
api/beta/sessions/events/stream
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/events/send
±changed
+5−1
apichanged
api/beta/sessions/events/send
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/events/list
±changed
+5−1
apichanged
api/beta/sessions/events/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/events
±changed
+15−3
apichanged
api/beta/sessions/events
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+15 −3 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/delete
±changed
+5−1
apichanged
api/beta/sessions/delete
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/create
±changed
+5−1
apichanged
api/beta/sessions/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions/archive
±changed
+5−1
apichanged
api/beta/sessions/archive
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/sessions
±changed
+95−19
apichanged
api/beta/sessions
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+95 −19 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/usage_report/retrieve_messages
±changed
+11−3
apichanged
api/beta/organization/usage_report/retrieve_messages
Group by any subset of the available options. Grouping by `speed` requires the `fast-mode-2026-02-01` beta header.
Group by any subset of the available options.
Restrict usage returned to the specified speed(s) (Claude Code research preview).
Requires the `fast-mode-2026-02-01` beta header.
Restrict usage returned to the specified speed(s).
+11 −3 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/usage_report
±changed
+19−3
apichanged
api/beta/organization/usage_report
Group by any subset of the available options. Grouping by `speed` requires the `fast-mode-2026-02-01` beta header.
Group by any subset of the available options.
Restrict usage returned to the specified speed(s) (Claude Code research preview).
Requires the `fast-mode-2026-02-01` beta header.
Restrict usage returned to the specified speed(s).
+19 −3 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/workspaces/remove
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/workspaces/remove
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/workspaces/list
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/workspaces/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/workspaces/add
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/workspaces/add
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/workspaces
±changed
+15−3
apichanged
api/beta/organization/telemetry_destinations/workspaces
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+15 −3 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/update
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/test
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/test
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/retrieve
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/list
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/delete
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/delete
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations/create
±changed
+5−1
apichanged
api/beta/organization/telemetry_destinations/create
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/telemetry_destinations
±changed
+45−9
apichanged
api/beta/organization/telemetry_destinations
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+45 −9 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/cost_report/retrieve
±changed
+9−0
apichanged
api/beta/organization/cost_report/retrieve
- `speed: "standard" or "fast" or null`
Speed used. `null` if not grouping by description, or for non-token costs.
+9 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization/cost_report
±changed
+17−0
apichanged
api/beta/organization/cost_report
- `speed: "standard" or "fast" or null`
Speed used. `null` if not grouping by description, or for non-token costs.
+17 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/organization
±changed
+65−12
apichanged
api/beta/organization
Group by any subset of the available options. Grouping by `speed` requires the `fast-mode-2026-02-01` beta header.
Group by any subset of the available options.
Restrict usage returned to the specified speed(s) (Claude Code research preview).
Requires the `fast-mode-2026-02-01` beta header.
Restrict usage returned to the specified speed(s).
+65 −12 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/messages/create
±changed
+2−0
apichanged
api/beta/messages/create
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=ht
+2 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/messages/count_tokens
±changed
+2−0
apichanged
api/beta/messages/count_tokens
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=ht
+2 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/messages/batches/create
±changed
+2−0
apichanged
api/beta/messages/batches/create
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_language
+2 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/messages/batches
±changed
+2−0
apichanged
api/beta/messages/batches
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_language
+2 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/messages
±changed
+6−0
apichanged
api/beta/messages
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=ht
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=ht
Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_language
+6 −0 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/memory_stores/update
±changed
+5−1
apichanged
api/beta/memory_stores/update
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/memory_stores/retrieve
±changed
+5−1
apichanged
api/beta/memory_stores/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/memory_stores/memory_versions/retrieve
±changed
+5−1
apichanged
api/beta/memory_stores/memory_versions/retrieve
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/memory_stores/memory_versions/redact
±changed
+5−1
apichanged
api/beta/memory_stores/memory_versions/redact
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
api
api/beta/memory_stores/memory_versions/list
±changed
+5−1
apichanged
api/beta/memory_stores/memory_versions/list
The version of the Claude API you want to use.
Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
Optional header to specify the beta version(s) you want to use.
+5 −1 lines
Recorded here 16 Oct 2026 01:37 UTC
Nothing on this page matches that. Press Enter to search every page of the ledger.