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Messages Claude Developer Platform · title api/beta/messages Cancel a Message Batch Claude Developer Platform · title api/beta/messages/batches/cancel Create a Message Batch Claude Developer Platform · title api/beta/messages/batches/create Delete a Message Batch Claude Developer Platform · title api/beta/messages/batches/delete List Message Batches Claude Developer Platform · title api/beta/messages/batches/list Retrieve Message Batch results Claude Developer Platform · title api/beta/messages/batches/results Retrieve a Message Batch Claude Developer Platform · title api/beta/messages/batches/retrieve Count tokens in a Message Claude Developer Platform · title api/beta/messages/count_tokens Create a Message Claude Developer Platform · title api/beta/messages/create Get Messages Usage Report Claude Developer Platform · title api/beta/organization/usage_report/retrieve_messages Messages Claude Developer Platform · title api/compliance/apps/chats/messages Get chat messages Claude Developer Platform · title api/compliance/apps/chats/messages/list Messages Claude Developer Platform · title api/compliance/apps/sessions/local/messages Retrieve local session messages Claude Developer Platform · title api/compliance/apps/sessions/local/messages/list Messages Claude Developer Platform · title api/compliance/apps/sessions/remote/messages Retrieve remote session messages Claude Developer Platform · title api/compliance/apps/sessions/remote/messages/list Messages Claude Developer Platform · title api/messages Cancel a Message Batch Claude Developer Platform · title api/messages/batches/cancel Create a Message Batch Claude Developer Platform · title api/messages/batches/create Delete a Message Batch Claude Developer Platform · title api/messages/batches/delete List Message Batches Claude Developer Platform · title api/messages/batches/list Retrieve Message Batch results Claude Developer Platform · title api/messages/batches/results Retrieve a Message Batch Claude Developer Platform · title api/messages/batches/retrieve Count tokens in a Message Claude Developer Platform · title api/messages/count_tokens Create a Message Claude Developer Platform · title api/messages/create Message Batches API Claude Developer Platform · title build-with-claude/batch-processing sent_count = len(messages sent in the compaction request) Claude Developer Platform · title build-with-claude/compaction mid-conversation-system-messages Claude Developer Platform · title build-with-claude/mid-conversation-system-messages working-with-messages Claude Developer Platform · title build-with-claude/working-with-messages WARNING: This operation PERMANENTLY deletes the chat, all of its messages, Claude Developer Platform · title manage-claude/compliance-content-data Message your other Claude Code sessions Claude Code CLI · title cross-session-messaging Messages Model Context Protocol · title specification/2024-11-05/basic/messages Batches Claude Developer Platform · path api/beta/messages/batches Batches Claude Developer Platform · path api/messages/batches api-credits-for-subscribers Claude Developer Platform · in the page about-claude/api-credits-for-subscribers …en/build-with-claude/prompt-caching) for repeated context. * Use the [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing) for work that doesn't need an immedia… glossary Claude Developer Platform · in the page about-claude/glossary …ure that allows API users to connect to MCP servers directly from the Messages API without building an MCP client. This allows seamless integration with MCP-compatible tools and services through the C… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …m previous Claude versions --- <Note> This guide covers migrating [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages) code. If you use [Claude Managed Agents… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence ….stream)' last_request.json | \ curl https://api.anthropic.com/v1/messages \ -H "x-api-key: $ANTHROPIC_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -H "content-type: applicati… pricing Claude Developer Platform · in the page about-claude/pricing …al tokens are consumed by: * Command outputs (stdout/stderr) * Error messages * Large file contents See [tool use pricing](https://platform.claude.com/docs/en/about-claude/pricing#tool-use-pricing)… commerce-agents Claude Developer Platform · in the page about-claude/use-case-guides/commerce-agents …ommerce, an open-source blueprint with working implementations on the Messages API, the Claude Agent SDK, and Claude Managed Agents. --- This guide shows how to build commerce agents on Claude: a sho… content-moderation Claude Developer Platform · in the page about-claude/use-case-guides/content-moderation …tokens: 28.6B (assuming 1 token per 3.5 characters) * Percentage of messages flagged: 3% * Output tokens per flagged message: 50 * Total output tokens: 1.5B * **Claude Haiku 5.5 estimated cost*… customer-support-chat Claude Developer Platform · in the page about-claude/use-case-guides/customer-support-chat …ss should have two main methods: one that calls the API to generate a message, and one that processes each incoming user input. <CodeGroup exclude="shell"> ```python Python # In your chatbot.py,… legal-summarization Claude Developer Platform · in the page about-claude/use-case-guides/legal-summarization …lease agreement text: {text} """ response = client.messages.create( model=model, max_tokens=max_tokens, system="You are a legal analyst specializing in… overview Claude Developer Platform · in the page about-claude/use-case-guides/overview …ng and merchant agents from an open-source blueprint that runs on the Messages API, the Claude Agent SDK, and Claude Managed Agents. </Card> </CardGroup> ## Choosing a build path The three paths f… ticket-routing Claude Developer Platform · in the page about-claude/use-case-guides/ticket-routing …# Send the prompt to the API to classify the support request. message = client.messages.create( model=DEFAULT_MODEL, max_tokens=2048, output_config={"effort": "lo… PDF Processing Claude Developer Platform · in the page agents-and-tools/agent-skills/best-practices …mit Helper skill:** ```yaml description: Generate descriptive commit messages by analyzing git diffs. Use when the user asks for help writing commit messages or reviewing staged changes. ``` Avoid v… claude-api-skill Claude Developer Platform · in the page agents-and-tools/agent-skills/claude-api-skill …ce material for building applications on two Anthropic surfaces: * **Messages API:** The primary surface for single requests, streaming chat, tool use, batch processing, prompt caching, structured ou… PDF Processing Claude Developer Platform · in the page agents-and-tools/agent-skills/overview …dow. Only its output (such as "Validation passed" or a specific error message) consumes tokens, which makes scripts far more efficient than having Claude generate equivalent code during the task. * **… quickstart Claude Developer Platform · in the page agents-and-tools/agent-skills/quickstart …newable energy. Specify Skills using the `container` parameter in the Messages API: <CodeGroup> ```bash cURL # Create a message with the PowerPoint Skill response=$( curl --fail-with-body -… mcp-connector Claude Developer Platform · in the page agents-and-tools/mcp-connector …onnector description: Connect to remote MCP servers directly from the Messages API without an MCP client, and allowlist, denylist, or configure individual tools. featureMetadata: status: beta beta…