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OpenAPI Specification

openapi: 3.2.0
info:
  title: SteamGPT Compare API
  version: 1.3.0
  description: Structured Steam identity and gaming context API, designed for AI agents and search assistants that need factual public Steam player information. No auth, no cookies, no tracking. Append .md (markdown), .json (JSON) or .ai (deterministic plain text) to any data endpoint; default depends on Accept header. Errors carry a machine-readable `error` slug and follow the same format selection.
servers:
- url: https://steamgpt.net
- url: https://steamgpt.net/v1
security:
- {}
- boostToken:
  - rate-boost
tags:
- name: Compare
paths:
  /compare/{id1}/{id2}:
    get:
      summary: Use when comparing two players.
      parameters:
      - name: id1
        in: path
        required: true
        schema:
          type: string
        description: any SteamID form, steamcommunity link or vanity name
      - name: id2
        in: path
        required: true
        schema:
          type: string
        description: any SteamID form, steamcommunity link or vanity name
      responses:
        '200':
          description: Both summaries + shared friends
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Compare'
            text/markdown:
              schema:
                type: string
            text/plain:
              schema:
                type: string
              description: .ai deterministic text
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limited, honor Retry-After
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      tags:
      - Compare
      operationId: getCompareById1ById2
      x-operation-id-source: derived
components:
  schemas:
    Error:
      type: object
      properties:
        result:
          type: string
          enum:
          - error
        code:
          type: integer
        error:
          type: string
          enum:
          - player_not_found
          - no_faceit_data
          - no_bans_data
          - batch_too_large
          - batch_no_valid_ids
          - bad_request
          - invalid_token
          - unknown_endpoint
          - rate_limited
          - internal
        message:
          type: string
      required:
      - result
      - code
      - error
    Compare:
      type: object
      properties:
        result:
          type: string
          enum:
          - success
        data:
          type: object
          properties:
            a:
              type: object
              description: full summary data of the first player
            b:
              type: object
              description: full summary data of the second player
            shared_friends:
              type: object
              properties:
                count:
                  type: integer
                friends:
                  type: array
                  items:
                    type: object
                    properties:
                      steamid64:
                        type: string
                      personaname:
                        type:
                        - string
                        - 'null'
  securitySchemes:
    boostToken:
      type: oauth2
      description: 'OPTIONAL. Every endpoint works without any credential. A self-service token (no registration, no client_id) raises the per-IP rate limit from 120 to 600 requests/min. Send it as: Authorization: Bearer <access_token>. Details: https://steamgpt.net/auth.md'
      flows:
        clientCredentials:
          tokenUrl: https://steamgpt.net/oauth/token
          scopes:
            rate-boost: Higher per-IP rate limit (600/min instead of 120/min)