openapi.json

{
  "openapi": "3.1.0",
  "info": {
    "title": "AltoDocs calculation integration",
    "version": "0.1.0",
    "description": "Calculation service only. No document access or persistence."
  },
  "paths": {
    "/v1/integrations/calc/evaluate": {
      "post": {
        "operationId": "evaluate_calculation",
        "summary": "Evaluate calculations with units",
        "description": "Evaluate ordered mathematical expressions with physical units using the AltoDocs calculation engine. Define variables before use, for example q := 12\\operatorname{kN}/\\operatorname{m}, L := 6\\operatorname{m}, then M := q \\cdot L^2 / 8. Use unit to request output conversion (for example N m). Returns a result or error for every expression. No document is read or saved and no structural-code compliance is asserted.",
        "security": [
          {
            "connectorToken": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$schema": "https://json-schema.org/draft/2020-12/schema",
                "type": "object",
                "properties": {
                  "expressions": {
                    "minItems": 1,
                    "maxItems": 200,
                    "type": "array",
                    "items": {
                      "type": "object",
                      "properties": {
                        "key": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 128
                        },
                        "latex": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 2000
                        },
                        "unit": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 128
                        }
                      },
                      "required": [
                        "key",
                        "latex"
                      ],
                      "additionalProperties": false
                    }
                  }
                },
                "required": [
                  "expressions"
                ],
                "additionalProperties": false
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Evaluated; individual expressions can have errors.",
            "content": {
              "application/json": {
                "schema": {
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "type": "object",
                  "properties": {
                    "results": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "key": {
                            "type": "string"
                          },
                          "variable": {
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "status": {
                            "type": "string",
                            "enum": [
                              "done",
                              "error"
                            ]
                          },
                          "value": {
                            "type": [
                              "number",
                              "null"
                            ]
                          },
                          "unit": {
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "formatted": {
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "error": {
                            "type": "string"
                          }
                        },
                        "required": [
                          "key",
                          "variable",
                          "status",
                          "value",
                          "unit",
                          "formatted"
                        ],
                        "additionalProperties": false
                      }
                    },
                    "engineVersion": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "results",
                    "engineVersion"
                  ],
                  "additionalProperties": false
                }
              }
            }
          },
          "400": {
            "description": "Invalid calculation request"
          },
          "401": {
            "description": "Missing or invalid connector token"
          },
          "403": {
            "description": "Missing calculations:evaluate scope"
          },
          "413": {
            "description": "Request too large"
          },
          "415": {
            "description": "Expected application/json"
          },
          "422": {
            "description": "Calculation time limit"
          },
          "429": {
            "description": "Rate limit; Retry-After is supplied"
          },
          "503": {
            "description": "Integration not configured, authorization unavailable, or calculation queue full"
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "connectorToken": {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "OAuth access token",
        "description": "Obtain a token for the resource advertised by /.well-known/oauth-protected-resource/mcp with calculations:evaluate scope."
      }
    }
  }
}