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
17 Sep 2026
51 pages
+8095 −5646 lines
api
test-and-evaluate/develop-tests
±changed
+6−6
apichanged
test-and-evaluate/develop-tests
if ($block instanceof TextBlock) {
if ($block instanceof \Anthropic\Messages\TextBlock) {
if ($block instanceof TextBlock) {
if ($block instanceof \Anthropic\Messages\TextBlock) {
if ($block instanceof TextBlock) {
+6 −6 lines
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api
release-notes/overview
±changed
+4−0
apichanged
release-notes/overview
### September 18, 2026
* The [Compliance API](https://platform.claude.com/docs/en/manage-claude/compliance-api) local session endpoints now also return transcripts of Claude in Chrome sessions (`product_
+4 −0 lines
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api
models/sonnet-5/migration-guide
±changed
+31−24
apichanged
models/sonnet-5/migration-guide
if (block.type === "thinking") {
console.log(`\nThinking summary: ${block.thinking}`);
} else if (block.type === "text") {
console.log(`\nResponse: ${block.text}`);
switch (block.type) {
+31 −24 lines
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api
models/overview
±changed
+1−1
apichanged
models/overview
| [Claude Platform on AWS ID](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | `claude-fable-5-1`
| [Claude Platform on AWS ID](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | `claude-fable-5-1`
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api
models/opus-5/overview
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+7−6
apichanged
models/opus-5/overview
| [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | `claude-opus-5` |
| Feature | Value
| :---------------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------------
| [Status](https://platform.claude.com/docs/en/about-claude/model-deprecations) | Active (latest)
| Released | July 24, 2026
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api
models/opus-5/migration-guide
±changed
+1−1
apichanged
models/opus-5/migration-guide
* Remove any context-window beta header. The 1M context window is the default on the Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry.
* Remove any context-window beta header. The 1M context window is the default on the Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry.
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api
managed-agents/vaults
±changed
+1−1
apichanged
managed-agents/vaults
if ($envVarCredential->auth instanceof ManagedAgentsEnvironmentVariableAuthResponse) {
if ($envVarCredential->auth instanceof \Anthropic\Beta\Vaults\Credentials\ManagedAgentsEnvironmentVariableAuthResponse) {
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api
managed-agents/skills
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+22−3
apichanged
managed-agents/skills
```bash CLI
ant skills create --file example_skill.zip
```
<MultiFileExample language="cli" label="CLI">
```bash CLI
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api
managed-agents/quickstart
±changed
+33−29
apichanged
managed-agents/quickstart
implementation("com.anthropic:anthropic-java:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
for await (const event of stream) {
if (event.type === "agent.message") {
for (const block of event.content) {
+33 −29 lines
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api
managed-agents/multiagent-orchestration
±changed
+32−24
apichanged
managed-agents/multiagent-orchestration
for await (const event of stream) {
if (event.type === "agent.message") {
for (const block of event.content) {
if (block.type === "text") {
process.stdout.write(block.text);
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api
managed-agents/migration
±changed
+108−84
apichanged
managed-agents/migration
if event.type == "agent.message":
print(
"".join(block.text for block in event.content if block.type == "text")
)
elif event.type == "agent.custom_tool_use":
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api
managed-agents/files
±changed
+9−6
apichanged
managed-agents/files
if (entry.isFile()) {
var fileResource = entry.asFile();
IO.println(fileResource.id() + " " + fileResource.type());
} else if (entry.isGitHubRepository()) {
var repoResource = entry.asGitHubRepository();
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api
managed-agents/events-and-streaming
±changed
+242−201
apichanged
managed-agents/events-and-streaming
for await (const event of stream) {
if (event.type === "agent.message") {
for (const block of event.content) {
if (block.type === "text") {
process.stdout.write(block.text);
+242 −201 lines
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api
manage-claude/compliance-sessions
±changed
+7−6
apichanged
manage-claude/compliance-sessions
The endpoints on this page are available only to Claude Enterprise organizations. The local and remote session endpoints are stable for Cowork and Claude Code sessions; coverage
The endpoints on this page are available only to Claude Enterprise organizations. The local and remote session endpoints are stable for Cowork and Claude Code sessions; coverage
The endpoints on this page expose transcripts of the sessions your users run in Claude apps and agents (today: Cowork, Claude Code, Claude Science, and Claude for Microsoft 365) fr
The endpoints on this page expose transcripts of the sessions your users run in Claude apps and agents (today: Cowork, Claude Code, Claude Science, Claude for Microsoft 365, and Cl
| Claude in Chrome (the browser extension's built-in chat), running on the user's machine | Local session endpoints
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api
manage-claude/compliance-integration-patterns
±changed
+1−1
apichanged
manage-claude/compliance-integration-patterns
* Claude Code usage authenticated with a Claude Console API key, run through a third-party cloud platform (Amazon Bedrock, Google Cloud, or Microsoft Foundry), or run in Claude Cod
* Claude Code usage authenticated with a Claude Console API key, run through a third-party cloud platform (Amazon Bedrock, Google Cloud, or Microsoft Foundry), or run in a [Claude
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api
manage-claude/compliance-faq
±changed
+4−4
apichanged
manage-claude/compliance-faq
Yes. Cowork sessions in Claude Desktop that run on users' machines, Claude Code sessions (in the terminal, in Claude Desktop, or in an IDE extension), sessions in the Claude Sc
Yes. Cowork sessions in Claude Desktop that run on users' machines, Claude Code sessions (in the terminal, in Claude Desktop, or in an IDE extension), sessions in the Claude Sc
Local sessions are captured as their requests reach the Claude API, so nothing is installed on the device, and on-device activity that never reaches the API is not captured. Cl
Local sessions are captured as their requests reach the Claude API, so nothing is installed on the device, and on-device activity that never reaches the API is not captured. Cl
The local and remote session endpoints are stable for Cowork and Claude Code sessions; coverage of Claude Science and Claude for Microsoft 365 sessions is in beta.
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api
manage-claude/compliance-api
±changed
+2−2
apichanged
manage-claude/compliance-api
The Compliance API gives Claude Enterprise and Claude Console customers programmatic access to their organization's Activity Feed. For Claude Enterprise organizations, it also cove
The Compliance API gives Claude Enterprise and Claude Console customers programmatic access to their organization's Activity Feed. For Claude Enterprise organizations, it also cove
A Claude Enterprise tenant has one parent organization (the top-level container that centralizes identity) with linked organizations of two kinds: claude.ai organizations, where us
A Claude Enterprise tenant has one parent organization (the top-level container that centralizes identity) with linked organizations of two kinds: claude.ai organizations, where us
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api
get-started
±changed
+2−2
apichanged
get-started
implementation("com.anthropic:anthropic-java:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
<version>2.60.0</version>
<version>2.63.0</version>
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api
cli-sdks-libraries/sdks/java
±changed
+3−3
apichanged
cli-sdks-libraries/sdks/java
implementation("com.anthropic:anthropic-java:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
<version>2.60.0</version>
<version>2.63.0</version>
Each `Backend` implementation is passed to the client with `.backend()` on `AnthropicOkHttpClient.builder()`. Each cloud backend pulls in its respective cloud-platform SDK classes
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api
claude_api_primer
±changed
+12−10
apichanged
claude_api_primer
if block.type == "thinking":
print(f"\nThinking summary: {block.thinking}")
elif block.type == "text":
print(f"\nResponse: {block.text}")
match block.type:
+12 −10 lines
Recorded here 17 Sep 2026 22:07 UTC
api
build-with-claude/thinking
±changed
+102−69
apichanged
build-with-claude/thinking
if block.type == "thinking":
print(f"\nThinking: {block.thinking}")
elif block.type == "text":
print(f"\nResponse: {block.text}")
match block.type:
+102 −69 lines
Recorded here 17 Sep 2026 22:07 UTC
api
build-with-claude/structured-outputs
±changed
+7−4
apichanged
build-with-claude/structured-outputs
if (block.type === "tool_use") {
console.log(`Tool call: ${block.name}(${JSON.stringify(block.input)})`);
} else if (block.type === "text") {
console.log("Response:", block.text);
switch (block.type) {
+7 −4 lines
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api
build-with-claude/streaming
±changed
+20−13
apichanged
build-with-claude/streaming
if event.delta.type == "thinking_delta":
print(event.delta.thinking, end="", flush=True)
elif event.delta.type == "text_delta":
print(event.delta.text, end="", flush=True)
delta = event.delta
+20 −13 lines
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api
build-with-claude/mid-conversation-effort-example
±changed
+49−41
apichanged
build-with-claude/mid-conversation-effort-example
use Anthropic\Messages\TextBlock;
case block.type
when :tool_use
case block
when Anthropic::Models::ToolUseBlock
+49 −41 lines
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api
build-with-claude/handling-stop-reasons
±changed
+58−44
apichanged
build-with-claude/handling-stop-reasons
if response.stop_reason == "tool_use":
return handle_tool_use(response)
elif response.stop_reason == "max_tokens":
return handle_truncation(response)
elif response.stop_reason == "model_context_window_exceeded":
+58 −44 lines
Recorded here 17 Sep 2026 22:07 UTC
api
build-with-claude/extended-thinking
±changed
+14−12
apichanged
build-with-claude/extended-thinking
if (block.type === "thinking") {
console.log(`\nThinking summary: ${block.thinking}`);
} else if (block.type === "text") {
console.log(`\nResponse: ${block.text}`);
switch (block.type) {
+14 −12 lines
Recorded here 17 Sep 2026 22:07 UTC
api
build-with-claude/compaction
±changed
+282−47
apichanged
build-with-claude/compaction
if event.type == "content_block_start":
if event.content_block.type == "compaction":
print("Compaction started...")
elif event.content_block.type == "text":
print("Text response started...")
+282 −47 lines
Recorded here 17 Sep 2026 22:07 UTC
api
build-with-claude/claude-platform-on-aws
±changed
+15−9
apichanged
build-with-claude/claude-platform-on-aws
* **Update your integration.** Claude Platform on AWS serves the Claude API (`/v1/{endpoint}`), so request and response shapes are unchanged from the first-party Claude API. What c
* **Update your integration.** Claude Platform on AWS serves the Claude API (`/v1/{endpoint}`), so request and response shapes are unchanged from the first-party Claude API. What c
implementation("com.anthropic:anthropic-java-aws:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
implementation("com.anthropic:anthropic-java-aws:2.63.0")
+15 −9 lines
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api
build-with-claude/claude-on-vertex-ai
±changed
+4−4
apichanged
build-with-claude/claude-on-vertex-ai
implementation("com.anthropic:anthropic-java:2.60.0")
implementation("com.anthropic:anthropic-java-vertex:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
implementation("com.anthropic:anthropic-java-vertex:2.63.0")
<version>2.60.0</version>
+4 −4 lines
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api
build-with-claude/claude-on-amazon-bedrock-legacy
±changed
+8−2
apichanged
build-with-claude/claude-on-amazon-bedrock-legacy
implementation("com.anthropic:anthropic-java-bedrock:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
implementation("com.anthropic:anthropic-java-bedrock:2.63.0")
<artifactId>anthropic-java</artifactId>
<version>2.63.0</version>
+8 −2 lines
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api
build-with-claude/claude-in-microsoft-foundry
±changed
+8−2
apichanged
build-with-claude/claude-in-microsoft-foundry
implementation("com.anthropic:anthropic-java-foundry:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
implementation("com.anthropic:anthropic-java-foundry:2.63.0")
<artifactId>anthropic-java</artifactId>
<version>2.63.0</version>
+8 −2 lines
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api
build-with-claude/claude-in-amazon-bedrock
±changed
+8−2
apichanged
build-with-claude/claude-in-amazon-bedrock
implementation("com.anthropic:anthropic-java-bedrock:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
implementation("com.anthropic:anthropic-java-bedrock:2.63.0")
<artifactId>anthropic-java</artifactId>
<version>2.63.0</version>
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api
build-with-claude/cache-diagnostics
±changed
+10−5
apichanged
build-with-claude/cache-diagnostics
if ($event instanceof BetaRawMessageStartEvent) {
// diagnostics arrives on the message_start event's embedded BetaMessage
$diagnostics = $event->message->diagnostics;
} elseif ($event instanceof BetaRawContentBlockDeltaEvent && $event->delta instanceof BetaTextDelta) {
echo $event->delta->text;
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api
build-with-claude/batch-processing
±changed
+29−23
apichanged
build-with-claude/batch-processing
| ------------------------------------------------------------------------------------------------------------------------------------- | ------------ | ------------- |
| :------------------------------------------------------------------------------------------------------------------------------------ | :----------- | :------------ |
match result.result.type:
outcome = result.result
match outcome.type:
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api
api/rate-limits
±changed
+1−1
apichanged
api/rate-limits
**[Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws):** The rate limits on this page apply to Claude Platform on AWS, but bill
**[Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws):** The rate limits on this page apply to Claude Platform on AWS, but bill
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api
api/compliance/organizations/settings/retrieve
±changed
+17−2
apichanged
api/compliance/organizations/settings/retrieve
Settings that report a compliance arrangement with Anthropic are the
exception: the HIPAA and Access Transparency settings are always included;
the API zero data retention setting is reported for Claude Console
organizations, and the Claude Code zero data retention and customer-managed
encryption keys (CMEK) settings for Claude Enterprise organizations. Each
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api
api/compliance/organizations/settings
±changed
+34−4
apichanged
api/compliance/organizations/settings
Settings that report a compliance arrangement with Anthropic are the
exception: the HIPAA and Access Transparency settings are always included;
the API zero data retention setting is reported for Claude Console
organizations, and the Claude Code zero data retention and customer-managed
encryption keys (CMEK) settings for Claude Enterprise organizations. Each
+34 −4 lines
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api
api/compliance/organizations
±changed
+17−2
apichanged
api/compliance/organizations
Settings that report a compliance arrangement with Anthropic are the
exception: the HIPAA and Access Transparency settings are always included;
the API zero data retention setting is reported for Claude Console
organizations, and the Claude Code zero data retention and customer-managed
encryption keys (CMEK) settings for Claude Enterprise organizations. Each
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api
api/compliance/activities/list
±changed
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apichanged
api/compliance/activities/list
- `activity_types: optional array of "abuse_decision_received" or "account_deleted" or "admin_api_key_created" or 499 more`
- `activity_types: optional array of "abuse_decision_received" or "account_deleted" or "admin_api_key_created" or 501 more`
- `"org_cowork_browser_pane_disabled"`
The in-app browser in Cowork was disabled for the organization, so Claude can no longer open or use websites in a browser pane during members' Cowork sessions.
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api
api/compliance/activities
±changed
+5718−4776
apichanged
api/compliance/activities
No line of the body moved in this read.
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api
api/compliance
±changed
+506−12
apichanged
api/compliance
- `activity_types: optional array of "abuse_decision_received" or "account_deleted" or "admin_api_key_created" or 499 more`
- `activity_types: optional array of "abuse_decision_received" or "account_deleted" or "admin_api_key_created" or 501 more`
- `"org_cowork_browser_pane_disabled"`
The in-app browser in Cowork was disabled for the organization, so Claude can no longer open or use websites in a browser pane during members' Cowork sessions.
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api
api/beta-headers
±changed
+9−1
apichanged
api/beta-headers
When using an SDK, list each feature in the `betas` parameter (for example, `betas=["feature1", "feature2"]`). With the CLI, pass a single `--beta` flag with the feature names sepa
You can also send the `anthropic-beta` header more than once in the same request. The Claude API reads every `anthropic-beta` header, so the following is equivalent to the previous
```http
anthropic-beta: feature1
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api
agents-and-tools/tool-use/tool-runner
±changed
+10−5
apichanged
agents-and-tools/tool-use/tool-runner
use Anthropic\Beta\Messages\BetaTextBlock;
use Anthropic\Beta\Messages\BetaToolUseBlock;
if ($block->type === 'text') {
echo $block->text, "\n";
} elseif ($block->type === 'tool_use') {
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api
agents-and-tools/tool-use/text-editor-tool
±changed
+26−20
apichanged
agents-and-tools/tool-use/text-editor-tool
if command == "view":
# Read and return file contents
pass
elif command == "str_replace":
# Replace text in file
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api
agents-and-tools/tool-use/fine-grained-tool-streaming
±changed
+84−68
apichanged
agents-and-tools/tool-use/fine-grained-tool-streaming
if (
$event instanceof RawContentBlockStartEvent
&& $event->contentBlock instanceof ToolUseBlock
) {
$toolInputs[$event->index] = '';
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api
agents-and-tools/tool-use/computer-use-tool
±changed
+24−19
apichanged
agents-and-tools/tool-use/computer-use-tool
if name == "screenshot":
return capture_screenshot()
elif name == "left_click":
# coordinate is optional; without it, click where the cursor already is
return click(tool_input.get("coordinate"))
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api
agents-and-tools/tool-use/browser-use-tool
±changed
+2−2
apichanged
agents-and-tools/tool-use/browser-use-tool
if (!($block instanceof ToolUseBlock) || $block->toolsetName !== 'browser') {
if (!($block instanceof \Anthropic\Messages\ToolUseBlock) || $block->toolsetName !== 'browser') {
4. In your `navigate` handler, accept the history keywords `"back"`, `"forward"`, and `"reload"`, treat a URL without a scheme as `https://`, then parse the URL and refuse any sc
4. In your `navigate` handler, accept the history keywords `"back"`, `"forward"`, and `"reload"`, treat a URL without a scheme as `https://`, then parse the URL and refuse any sc
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api
agents-and-tools/tool-use/advisor-tool
±changed
+2−25
apichanged
agents-and-tools/tool-use/advisor-tool
// BetaMessage.ToParam drops advisor result content as of anthropic-sdk-go
// v1.61.0, so re-parse each response block's raw JSON into a param block instead.
assistantContent := make([]anthropic.BetaContentBlockParamUnion, len(response.Content))
for i, block := range response.Content {
if err := json.Unmarshal([]byte(block.RawJSON()), &assistantContent[i]); err != nil {
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api
agents-and-tools/mcp-connector
±changed
+9−3
apichanged
agents-and-tools/mcp-connector
The helpers live in the separate `anthropic-java-mcp` artifact, which requires Java 17 or later (the core SDK supports Java 8):
The helpers live in the separate `anthropic-java-mcp` artifact, which requires Java 17 or later (the base SDK supports Java 8). Add it alongside the base `anthropic-java` depen
implementation("com.anthropic:anthropic-java-mcp:2.60.0")
implementation("com.anthropic:anthropic-java:2.63.0")
implementation("com.anthropic:anthropic-java-mcp:2.63.0")
+9 −3 lines
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api
about-claude/use-case-guides/content-moderation
±changed
+4−4
apichanged
about-claude/use-case-guides/content-moderation
$textBlock = array_find($response->content, fn ($block) => $block instanceof TextBlock)
$textBlock = array_find($response->content, fn ($block) => $block instanceof \Anthropic\Messages\TextBlock)
$textBlock = array_find($response->content, fn ($block) => $block instanceof TextBlock)
$textBlock = array_find($response->content, fn ($block) => $block instanceof \Anthropic\Messages\TextBlock)
$textBlock = array_find($response->content, fn ($block) => $block instanceof TextBlock)
+4 −4 lines
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api
about-claude/pricing
±changed
+1−1
apichanged
about-claude/pricing
| ------------------------------------------------------------------------------------------------------------------------------------- | ------------ | ------------- |
| :------------------------------------------------------------------------------------------------------------------------------------ | :----------- | :------------ |
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16 Sep 2026
256 pages
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api
release-notes/overview
±changed
+1−1
apichanged
release-notes/overview
* The `ant` CLI adds `ant beta:sessions connect`, which attaches your terminal to a Claude Managed Agents session. You can follow the session live, send messages, and allow or deny
* Version 1.32.0 of the `ant` CLI adds `ant beta:sessions connect`, which attaches your terminal to a Claude Managed Agents session. You can follow the session live, send messages,
+1 −1 lines
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api
managed-agents/webhooks
±changed
+4−0
apichanged
managed-agents/webhooks
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/vaults
±changed
+15−13
apichanged
managed-agents/vaults
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/tools
±changed
+4−4
apichanged
managed-agents/tools
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/skills
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apichanged
managed-agents/skills
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/sessions
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apichanged
managed-agents/sessions
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/session-operations
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apichanged
managed-agents/session-operations
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/self-hosted-sandboxes-security
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managed-agents/self-hosted-sandboxes-security
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/self-hosted-sandboxes
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managed-agents/self-hosted-sandboxes
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
VERSION=1.30.0
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api
managed-agents/scheduled-deployments
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managed-agents/scheduled-deployments
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/reference
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managed-agents/reference
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/quickstart
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apichanged
managed-agents/quickstart
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
VERSION=1.30.0
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api
managed-agents/permission-policies
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apichanged
managed-agents/permission-policies
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/overview
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managed-agents/overview
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/onboarding
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managed-agents/onboarding
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/multiagent-orchestration
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apichanged
managed-agents/multiagent-orchestration
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/migration
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managed-agents/migration
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/memory
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+4−4
apichanged
managed-agents/memory
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `agent-memory-2026-07-22`
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api
managed-agents/mcp-connector
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apichanged
managed-agents/mcp-connector
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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Recorded here 16 Sep 2026 15:07 UTC
api
managed-agents/github
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+4−4
apichanged
managed-agents/github
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/files
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apichanged
managed-agents/files
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/events-and-streaming
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apichanged
managed-agents/events-and-streaming
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/environments
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+4−4
apichanged
managed-agents/environments
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/define-outcomes
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apichanged
managed-agents/define-outcomes
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/cloud-sandboxes-reference
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+4−4
apichanged
managed-agents/cloud-sandboxes-reference
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/budgets
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managed-agents/budgets
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
managed-agents/agent-setup
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apichanged
managed-agents/agent-setup
## Compatibility
- Status: Beta
- [Beta header](https://platform.claude.com/docs/en/api/beta-headers): `managed-agents-2026-04-01`
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api
manage-claude/cmek
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+1−1
apichanged
manage-claude/cmek
* [Personal preferences - Instructions for Claude section](https://claude.ai/new#settings/general) and Cowork Global instructions. These are set at the account level and shared acr
* [Personal preferences - Instructions for Claude section](https://claude.ai/new#settings/account) and Cowork Global instructions. These are set at the account level and shared acr
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api
get-started
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+1−1
apichanged
get-started
* An [API key](https://platform.claude.com/settings/keys)
* An [API key](https://platform.claude.com/docs/en/get-api-key)
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api
cli-sdks-libraries/cli/sessions-connect
+new page
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apinew page
cli-sdks-libraries/cli/sessions-connect
No line of the body moved in this read.
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api
cli-sdks-libraries/cli/quickstart
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+1−1
apichanged
cli-sdks-libraries/cli/quickstart
VERSION=1.30.0
VERSION=1.33.0
+1 −1 lines
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api
build-with-claude/skills-guide
±changed
+6−4
apichanged
build-with-claude/skills-guide
fileMetadata, err := client.Files.GetMetadata(context.TODO(), fileID)
fileMetadata, err := client.Files.GetMetadata(context.TODO(), fileID, anthropic.FileGetMetadataParams{})
fileContent, err := client.Files.Download(context.TODO(), fileID)
fileContent, err := client.Files.Download(context.TODO(), fileID, anthropic.FileDownloadParams{})
fileInfo, err := client.Files.GetMetadata(context.TODO(), fileID)
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api
build-with-claude/prompt-caching
±changed
+4−4
apichanged
build-with-claude/prompt-caching
| ------------------------------------------------------------------------------------------------------------------------------------- | ----------------- | --------------- | ----
| Claude Fable 5.1 | $10 / MTok | $12.50 / MTok | $20
| Claude Mythos 5.1 ([limited availability](https://anthropic.com/glasswing)) | $10 / MTok | $12.50 / MTok | $20
| :------------------------------------------------------------------------------------------------------------------------------------ | :---------------- | :-------------- | :---
| Claude Fable 5.1 | $10 / MTok | $12.50 / MTok | $20
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api
build-with-claude/preserved-thinking
±changed
+1−1
apichanged
build-with-claude/preserved-thinking
* [Compaction](https://platform.claude.com/docs/en/build-with-claude/compaction) summarizes older turns into a compaction block when the context approaches a threshold you set, and
* [Compaction](https://platform.claude.com/docs/en/build-with-claude/compaction) summarizes older turns into a compaction block when the context approaches a threshold you set, and
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api
build-with-claude/files
±changed
+3−3
apichanged
build-with-claude/files
metadata, err := client.Files.GetMetadata(context.TODO(), fileID)
metadata, err := client.Files.GetMetadata(context.TODO(), fileID, anthropic.FileGetMetadataParams{})
_, err = client.Files.Delete(context.TODO(), fileID)
_, err = client.Files.Delete(context.TODO(), fileID, anthropic.FileDeleteParams{})
resp, err := client.Files.Download(context.TODO(), fileID)
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Recorded here 16 Sep 2026 15:07 UTC
api
build-with-claude/compaction
±changed
+1−1
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build-with-claude/compaction
Send the `compact-2026-09-04` beta header on the request that asks for the summary and on every later request that carries the signed block. On-demand compaction is available on th
Send the `compact-2026-09-04` beta header on the request that asks for the summary and on every later request that carries the signed block. On-demand compaction is available on th
+1 −1 lines
Recorded here 16 Sep 2026 15:07 UTC
api
build-with-claude/batch-processing
±changed
+3−3
apichanged
build-with-claude/batch-processing
messageBatch, err = client.Messages.Batches.Get(context.TODO(), messageBatchID)
messageBatch, err = client.Messages.Batches.Get(context.TODO(), messageBatchID, anthropic.MessageBatchGetParams{})
stream := client.Messages.Batches.ResultsStreaming(context.TODO(), "msgbatch_01HkcTjaV5uDC8jWR4ZsDV8d")
stream := client.Messages.Batches.ResultsStreaming(context.TODO(), "msgbatch_01HkcTjaV5uDC8jWR4ZsDV8d", anthropic.MessageBatchResultsParams{})
messageBatch, err := client.Messages.Batches.Cancel(context.TODO(), messageBatchID)
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api
api/overview
±changed
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apichanged
api/overview
The API is made available through the web [Console](https://platform.claude.com/). You can use [playground](https://platform.claude.com/playground) to try out the API in the browse
The API is made available through the web [Console](https://platform.claude.com/). You can use [playground](https://platform.claude.com/playground) to try out the API in the browse
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api
api/models/retrieve
±changed
+3−1
apichanged
api/models/retrieve
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 42 more`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 43 more`
- `"compact-2026-09-04"`
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api
api/models/list
±changed
+3−1
apichanged
api/models/list
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 42 more`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 43 more`
- `"compact-2026-09-04"`
+3 −1 lines
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api
api/models
±changed
+6−2
apichanged
api/models
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 42 more`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 43 more`
- `"compact-2026-09-04"`
- `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 42 more`
+6 −2 lines
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api
api/messages/create
±changed
+118−0
apichanged
api/messages/create
- `url_sources: optional WebFetchURLSources or null`
Which sources contribute to the set of URLs web fetch may fetch.
Each key is a tagged variant: `user_input` is `all` or `none`; the
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api
api/messages/count_tokens
±changed
+118−0
apichanged
api/messages/count_tokens
- `url_sources: optional WebFetchURLSources or null`
Which sources contribute to the set of URLs web fetch may fetch.
Each key is a tagged variant: `user_input` is `all` or `none`; the
+118 −0 lines
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api
api/messages/batches/create
±changed
+118−0
apichanged
api/messages/batches/create
- `url_sources: optional WebFetchURLSources or null`
Which sources contribute to the set of URLs web fetch may fetch.
Each key is a tagged variant: `user_input` is `all` or `none`; the
+118 −0 lines
Recorded here 16 Sep 2026 15:07 UTC
api
api/messages/batches
±changed
+118−0
apichanged
api/messages/batches
- `url_sources: optional WebFetchURLSources or null`
Which sources contribute to the set of URLs web fetch may fetch.
Each key is a tagged variant: `user_input` is `all` or `none`; the
+118 −0 lines
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api
api/messages
±changed
+1106−0
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api/messages
- `url_sources: optional WebFetchURLSources or null`
Which sources contribute to the set of URLs web fetch may fetch.
Each key is a tagged variant: `user_input` is `all` or `none`; the
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api
api/errors
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api/errors
* 401 - `authentication_error`: There's an issue with your API key (for example, it's malformed, revoked, or expired; see [Key expiration](https://platform.claude.com/docs/en/manag
* 401 - `authentication_error`: There's an issue with your [API key](https://platform.claude.com/docs/en/get-api-key) (for example, it's malformed, revoked, or expired; see [Key ex
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api
api/compliance/organizations/users/list
±changed
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api/compliance/organizations/users/list
- `organization_role: "admin" or "billing" or "claude_code_user" or 6 more`
- `organization_role: "admin" or "billing" or "claude_code_user" or 8 more`
- `"parent_org_admin"`
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api
api/compliance/organizations/users
±changed
+10−2
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api/compliance/organizations/users
- `organization_role: "admin" or "billing" or "claude_code_user" or 6 more`
- `organization_role: "admin" or "billing" or "claude_code_user" or 8 more`
- `"parent_org_admin"`
+10 −2 lines
Recorded here 16 Sep 2026 15:07 UTC
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