Tools

Send Message

Send a message to Claude and receive a generated response. Supports multi-turn conversations, system prompts, tool use (function calling), extended thinking, and vision (images). Provide a conversation history as messages and configure model parameters to control the response.

Manage Message Batch

Create, retrieve, list, or cancel message batches for asynchronous processing. Batches allow processing large volumes of messages at reduced cost (up to 24 hours). Use **action** to specify the operation: "create", "get", "list", or "cancel".

List Models

List available Claude models and their details. Retrieve information about context window size, capabilities, and model identifiers. Optionally fetch details for a specific model by providing its ID.

Manage API Keys

List and update organization API keys via the Admin API. View active, inactive, or archived keys filtered by workspace. Update keys to activate, deactivate, or rename them. Requires an Admin API key (sk-ant-admin...).

Manage Workspaces

Manage organization workspaces and their members via the Admin API. Create, list, update, archive workspaces, and manage workspace membership. Use **action** to specify the operation. Requires an Admin API key (sk-ant-admin...).

Manage Organization Members

Manage organization members and invites via the Admin API. List members, update roles, remove members, or manage invitations. Use **action** to specify the operation. Requires an Admin API key (sk-ant-admin...).

Count Tokens

Count the number of tokens in a message without sending it. Useful for estimating costs, managing context window limits, and planning prompt strategies before making actual API calls.

Get Organization

Retrieve information about the organization associated with the current Admin API key. Useful for determining which organization a key belongs to and getting organization details. Requires an Admin API key (sk-ant-admin...).