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OpenAPI Specification

openapi: 3.2.0
info:
  title: Concentrate Messages API
  version: '2026-10-29'
  description: 'GENERATED FROM DOCUMENTATION by API Evangelist on 2026-10-29: 20 operation(s) read from 26 public documentation page(s) (each operation names its page in x-source). This is not the provider''s published contract; Concentrate has published no machine-readable contract that the pipeline could find. Engine: anthropic.'
  x-evidence-tiers:
    code-example: 19
    documentation: 1
    pages-with-code: 25
    pages-read: 26
  x-generated-from: documentation
  x-provenance: generated
  x-authored-by: API Evangelist
  x-generated: '2026-10-29'
  x-generator: generate-contract-from-docs.py
  x-engine: anthropic
  x-sources:
  - https://concentrate.ai/docs/api-reference/endpoint/errors
  - https://concentrate.ai/docs/api-reference/endpoint/health
  - https://concentrate.ai/docs/api-reference/endpoint/headers
  - https://concentrate.ai/docs/api-reference/endpoint/decisions
  - https://concentrate.ai/docs/api-reference/endpoint/get-model
  - https://concentrate.ai/docs/api-reference/endpoint/streaming
  - https://concentrate.ai/docs/api-reference/endpoint/systemone
  - https://concentrate.ai/docs/api-reference/endpoint/web-search
  - https://concentrate.ai/docs/api-reference/endpoint/list-models
  - https://concentrate.ai/docs/api-reference/endpoint/multi-modal
  - https://concentrate.ai/docs/api-reference/endpoint/auto-routing
  - https://concentrate.ai/docs/api-reference/endpoint/tool-calling
  - https://concentrate.ai/docs/api-reference/endpoint/service-tiers
  - https://concentrate.ai/docs/api-reference/endpoint/create-message
  - https://concentrate.ai/docs/api-reference/endpoint/list-providers
  - https://concentrate.ai/docs/api-reference/endpoint/create-response
  - https://concentrate.ai/docs/api-reference/endpoint/chat-completions
  - https://concentrate.ai/docs/api-reference/endpoint/supported-models
  - https://concentrate.ai/docs/api-reference/endpoint/get-provider-info
  - https://concentrate.ai/docs/api-reference/endpoint/structured-output
  - https://concentrate.ai/docs/api-reference/endpoint/zero-data-retention
  - https://concentrate.ai/docs/api-reference/endpoint/guardrails-redaction
  - https://concentrate.ai/docs/api-reference/endpoint/list-models-by-author
  - https://concentrate.ai/docs/api-reference/endpoint/list-models-by-provider
  - https://concentrate.ai/docs/api-reference/introduction
  - https://concentrate.ai/docs/getting-started/quickstart
servers:
- url: https://api.concentrate.ai
security:
- bearer: []
tags:
- name: Messages
paths:
  /v1/messages:
    get:
      operationId: get_v1_messages
      tags:
      - Messages
      summary: GET /v1/messages
      x-source: https://concentrate.ai/docs/api-reference/endpoint/create-message
      responses:
        '200':
          description: Success (status as documented)
      x-evidence:
        kind: code-example
        language: curl
        snippet: "curl);\nif ($err) {\n echo \"cURL Error #:\" . $err;\n} else {\n echo $response;\n} package main\nimport (\n \"fmt\"\n \"strings\"\n \"net/http\"\n \"io\"\n)\nfunc main() {\n url := \"https://api.concentrate.ai/v1/messages/\"\n payload := strings.NewReader(\"{\\n \\\"messages\\\": [\\n {\\n \\\"content\\\": \\\"<string>\\\",\\n \\\"output_config\\\": {}\\n }\\n ],\\n \\\"max_tokens\\\": 4503599627370495,\\n \\\"model\\\": \\\"<string>\\\",\\n \\\"provider\\\": \\\"<"
    post:
      operationId: post_v1_messages
      tags:
      - Messages
      summary: Errors from POST /v1/messages use Anthropic's error shape
      x-source: https://concentrate.ai/docs/api-reference/endpoint/errors
      responses:
        '201':
          description: Success (status as documented)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostV1MessagesResponse'
      x-evidence:
        kind: documentation
  /v1/messages/:
    post:
      operationId: postV1Messages
      tags:
      - Messages
      summary: Anthropic Messages API compatibility endpoint for Claude Code and other clients
      x-source: https://concentrate.ai/docs/api-reference/endpoint/create-message
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostV1MessagesRequest'
      responses:
        '200':
          description: Success (status as documented)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostV1MessagesResponse2'
      x-evidence:
        kind: documentation
      x-operation-id-source: normalized
      x-operation-id-original: post_v1_messages
components:
  schemas:
    PostV1MessagesRequest:
      type: object
      properties:
        messages:
          type: object
          description: 'Minimum array length: 1'
        max_tokens:
          type: integer
          description: 'Required range: 0 <= x <= 9007199254740991'
        model:
          type: string
          description: Model identifier. Use /v1/models to list all available models. Supports canonical names (e.g. gpt-5.2, claude-opus-4-6), aliases, and provider-prefixed formats (e.g. openai/gpt-5.2). Use "auto" for automatic model selection.
        provider:
          type: string
        cache_control:
          type: object
          description: Cache control settings for explicit prompt caching of this content.
        compaction:
          type: object
        container:
          type: object
        context_management:
          type: object
        diagnostics:
          type: object
        fallback_credit_token:
          type: string
        fallbacks:
          type: object
        mcp_servers:
          type: object
        metadata:
          type: object
        output_config:
          type: object
        output_format:
          type: object
        safeguards:
          type: object
        stream:
          type: boolean
        system:
          type: string
        temperature:
          type: number
          description: 'Required range: 0 <= x <= 1'
        thinking:
          type: object
        tool_choice:
          type: object
        tools:
          type: object
        top_p:
          type: number
        inference_geo:
          type: string
        service_tier:
          type: string
        stop_sequences:
          type: string
        top_k:
          type: integer
        routing:
          type: object
      required:
      - messages
      - max_tokens
      - model
    PostV1MessagesResponse2:
      type: object
      properties:
        id:
          type: string
        type:
          type: string
        role:
          type: string
        model:
          type: string
        content:
          type: object
        usage:
          type: object
        cost:
          type: object
        stop_reason:
          type: string
        stop_sequence:
          type: string
        redact:
          type: object
    PostV1MessagesResponse:
      type: object
      properties:
        type:
          type: string
        error:
          type: object
        error.type:
          type: string
        error.message:
          type: string
        request_id:
          type: string
  securitySchemes:
    bearer:
      type: http
      scheme: bearer