{
  "openapi": "3.1.1",
  "info": {
    "title": "CompatAir UCP air compatibility service",
    "version": "2026-07-15",
    "description": "Read-only technical compatibility enrichment. No identity, cart, checkout, payment, order or webhook operation is exposed."
  },
  "servers": [
    {
      "url": "https://compatair.fr/api/ucp/v1"
    }
  ],
  "paths": {
    "/compatibility/evaluate": {
      "post": {
        "operationId": "evaluateAirCompatibility",
        "summary": "Evaluate a complete compressed-air configuration",
        "parameters": [
          {
            "name": "UCP-Agent",
            "in": "header",
            "required": true,
            "schema": {
              "type": "string",
              "maxLength": 2048,
              "pattern": "^profile=\\\"https://[^\\\"]+\\\"$"
            },
            "description": "RFC 8941 dictionary containing the HTTPS platform profile URL."
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/EvaluationRequest"
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Compatibility result or negotiated capability error",
            "content": {
              "application/json": {
                "schema": {
                  "oneOf": [
                    {
                      "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/EvaluationResponse"
                    },
                    {
                      "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                    }
                  ]
                }
              }
            }
          },
          "400": {
            "description": "Invalid closed-schema request or profile URL",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          },
          "403": {
            "description": "Untrusted or forbidden profile target",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          },
          "413": {
            "description": "Request body over 64 KiB",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          },
          "415": {
            "description": "Content-Type is not application/json",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          },
          "422": {
            "description": "Unsupported UCP version",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          },
          "424": {
            "description": "Platform profile could not be fetched safely",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          },
          "429": {
            "description": "Rate limited",
            "headers": {
              "Retry-After": {
                "schema": {
                  "type": "integer"
                }
              }
            },
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "https://compatair.fr/schemas/ucp-compatibility-2026-07-15.json#/$defs/ErrorResponse"
                }
              }
            }
          }
        },
        "security": []
      }
    }
  }
}