{
  "openapi": "3.0.3",
  "info": {
    "title": "BizCal API",
    "version": "1.0.0",
    "description": "Self-contained business-day, holiday, and T+N settlement calculations for 17 jurisdictions (15 national + NYSE + SIFMA-US). Fully offline — no upstream holiday API. Calendar data version 2026-07."
  },
  "servers": [
    {
      "url": "https://bizcal-api.pages.dev"
    }
  ],
  "tags": [
    {
      "name": "Calendar",
      "description": "Business-day operations."
    },
    {
      "name": "Settlement",
      "description": "T+N settlement date math."
    },
    {
      "name": "Meta",
      "description": "Health and specification."
    }
  ],
  "paths": {
    "/openapi.json": {
      "get": {
        "tags": [
          "Meta"
        ],
        "summary": "OpenAPI specification",
        "responses": {
          "200": {
            "description": "OpenAPI document"
          }
        }
      }
    },
    "/health": {
      "get": {
        "tags": [
          "Meta"
        ],
        "summary": "Health check",
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/jurisdictions": {
      "get": {
        "tags": [
          "Meta"
        ],
        "summary": "List supported jurisdictions",
        "responses": {
          "200": {
            "description": "Jurisdiction list",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/check": {
      "get": {
        "tags": [
          "Calendar"
        ],
        "summary": "Is a date a business day?",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "parameters": [
          {
            "name": "jurisdiction",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "date",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Day classification",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          },
          "400": {
            "description": "Bad request",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      }
    },
    "/add": {
      "get": {
        "tags": [
          "Calendar"
        ],
        "summary": "Add business days to a date",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "parameters": [
          {
            "name": "jurisdiction",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "date",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          },
          {
            "name": "days",
            "in": "query",
            "required": true,
            "schema": {
              "type": "integer"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Result date with skipped[]",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/diff": {
      "get": {
        "tags": [
          "Calendar"
        ],
        "summary": "Count business days between two dates (inclusive)",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "parameters": [
          {
            "name": "jurisdiction",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "start",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          },
          {
            "name": "end",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Count with skipped[]",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/next": {
      "get": {
        "tags": [
          "Calendar"
        ],
        "summary": "Next business day after a date",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "parameters": [
          {
            "name": "jurisdiction",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "date",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Next business day",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/holidays": {
      "get": {
        "tags": [
          "Calendar"
        ],
        "summary": "List holidays in a date range",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "parameters": [
          {
            "name": "jurisdiction",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "from",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          },
          {
            "name": "to",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "format": "date"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Holiday list",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/settlement": {
      "post": {
        "tags": [
          "Settlement"
        ],
        "summary": "Compute T+N settlement date",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "trade_date",
                  "jurisdiction",
                  "convention"
                ],
                "properties": {
                  "trade_date": {
                    "type": "string",
                    "format": "date"
                  },
                  "jurisdiction": {
                    "type": "string"
                  },
                  "convention": {
                    "type": "string",
                    "example": "T+2"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Settlement result",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    },
    "/batch": {
      "post": {
        "tags": [
          "Calendar"
        ],
        "summary": "Check multiple jurisdiction/date pairs",
        "security": [
          {
            "ApiKeyHeader": []
          },
          {
            "BearerAuth": []
          },
          {
            "QueryApiKey": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "checks"
                ],
                "properties": {
                  "checks": {
                    "type": "array",
                    "items": {
                      "type": "object",
                      "required": [
                        "jurisdiction",
                        "date"
                      ],
                      "properties": {
                        "jurisdiction": {
                          "type": "string"
                        },
                        "date": {
                          "type": "string",
                          "format": "date"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Batch results",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/DayInfo"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "ErrorBody": {
        "type": "object",
        "required": [
          "error"
        ],
        "properties": {
          "error": {
            "type": "object",
            "required": [
              "code",
              "message"
            ],
            "properties": {
              "code": {
                "type": "string"
              },
              "message": {
                "type": "string"
              }
            }
          }
        }
      },
      "SkippedDay": {
        "type": "object",
        "required": [
          "date",
          "type"
        ],
        "properties": {
          "date": {
            "type": "string",
            "format": "date"
          },
          "type": {
            "type": "string",
            "enum": [
              "weekend",
              "holiday"
            ]
          },
          "name": {
            "type": "string"
          }
        }
      },
      "DayInfo": {
        "type": "object",
        "properties": {
          "date": {
            "type": "string"
          },
          "jurisdiction": {
            "type": "string"
          },
          "isBusinessDay": {
            "type": "boolean"
          },
          "isWeekend": {
            "type": "boolean"
          },
          "isHoliday": {
            "type": "boolean"
          },
          "isHalfDay": {
            "type": "boolean"
          },
          "closeTime": {
            "type": "string",
            "nullable": true
          },
          "holidayName": {
            "type": "string",
            "nullable": true
          }
        }
      }
    },
    "securitySchemes": {
      "ApiKeyHeader": {
        "type": "apiKey",
        "in": "header",
        "name": "X-API-Key"
      },
      "BearerAuth": {
        "type": "http",
        "scheme": "bearer"
      },
      "QueryApiKey": {
        "type": "apiKey",
        "in": "query",
        "name": "api_key"
      }
    }
  }
}