v1

latestOpenAPI 3.1.0Commercial2026-07-26232551.7 KB

Messages

Create a message

post/messages

Request body

modelstring required

max_tokensinteger required

stop_sequencesstring[]

streamboolean

temperaturenumber

top_pnumber

top_kinteger

toolsobject[]

tool_choiceobject

{"stackTrail":"components:schemas:AnthropicMessageRequest:properties:mcp_servers","oasType":"schema","type":"unknown","description":"Free-form MCP server configuration forwarded to Anthropic\nverbatim.\n"}

metadataobject

Example request

{
  "model": "anthropic/claude-sonnet-4.6"
}

Response

idstring

type'message'

role'assistant'

modelstring

stop_reason'end_turn' | 'max_tokens' | 'stop_sequence' | 'tool_use'

stop_sequencestring nullable