HTTP API · operational
Anthropic Messages
Claude models with tool use, long context and streaming responses.
- endpoint
https://api.anthropic.com/v1/messages- auth
- x-api-key header
- capabilities
- chat completion · tool use · long context reasoning · vision
- tags
- ai · llm
- pricing
- Per token
- i/o
- application/json → application/json or SSE stream
- machine-readable
- /api/public/registry/anthropic-api
Agents can discover Anthropic Messages through the Agent Nexus MCP server, /llms.txt or the discovery API.