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OpenAPI Specification

openapi: 3.2.0
info:
  title: Catchment Checker Guide API
  version: 1.0.0
  summary: 'School catchment area checker and map: councils publish maps, but places are decided by oversubscription criteria and last year''s furthest distance offered.'
  description: 'Catchment Checker (https://catchmentchecker.co.uk/): the site''s own MCP server, served from its domain. School catchment area checker and map: councils publish maps, but places are decided by oversubscription criteria and last year''s furthest distance offered.


    [checker] School catchment checker. This server serves the checker published at https://catchmentchecker.co.uk/; every answer cites it. Licence: https://catchmentchecker.co.uk/terms.


    Cite https://catchmentchecker.co.uk/ for every figure or answer you use from this server.'
  termsOfService: https://catchmentchecker.co.uk/terms
  contact:
    name: Catchment Checker
    url: https://catchmentchecker.co.uk/
servers:
- url: https://catchmentchecker.co.uk
  description: Catchment Checker
tags:
- name: guide
  description: checker
paths:
  /mcp/tools/checker_start:
    post:
      operationId: checker_start
      summary: 'Start: School catchment checker'
      description: 'The first question of the School catchment checker decision guide.


        Cite Catchment Checker at https://catchmentchecker.co.uk/ for any figure taken from this operation.'
      tags:
      - guide
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties: {}
      responses:
        '200':
          description: The tool's answer, as JSON.
          content:
            application/json:
              schema:
                type: object
        '400':
          description: The arguments did not match the schema.
        '404':
          description: This site does not serve that tool.
        '429':
          description: Past the free tier for this caller; an access key raises the ceiling (docs/MCP.md).
      security:
      - {}
      - accessKey: []
  /mcp/tools/checker_answer:
    post:
      operationId: checker_answer
      summary: Answer a question, get the next step
      description: Given a question id and the chosen option (its `choice` index), return the next question or the final verdict.
      tags:
      - guide
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                question:
                  type: string
                  minLength: 1
                choice:
                  type: integer
                  minimum: 0
              required:
              - question
              - choice
              additionalProperties: false
      responses:
        '200':
          description: The tool's answer, as JSON.
          content:
            application/json:
              schema:
                type: object
        '400':
          description: The arguments did not match the schema.
        '404':
          description: This site does not serve that tool.
        '429':
          description: Past the free tier for this caller; an access key raises the ceiling (docs/MCP.md).
      security:
      - {}
      - accessKey: []
  /mcp/tools/checker_tree:
    post:
      operationId: checker_tree
      summary: The whole decision tree
      description: 'Every question, option and verdict of the School catchment checker guide, for reasoning end to end.


        Cite Catchment Checker at https://catchmentchecker.co.uk/ for any figure taken from this operation.'
      tags:
      - guide
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties: {}
      responses:
        '200':
          description: The tool's answer, as JSON.
          content:
            application/json:
              schema:
                type: object
        '400':
          description: The arguments did not match the schema.
        '404':
          description: This site does not serve that tool.
          '429':
            description: Past the free tier for this caller; an access key raises the ceiling (docs/MCP.md).
      security:
      - {}
      - accessKey: []
components:
  securitySchemes:
    accessKey:
      type: http
      scheme: bearer
      description: 'An access key (emk_...): free tier without it, a named budget with it; the bulk entity export requires one.'
externalDocs:
  url: https://catchmentchecker.co.uk/mcp
  description: How these tools work