{
  "openapi": "3.0.3",
  "info": {
    "title": "ModelPriceLab Data API",
    "version": "1.0.0",
    "description": "API-key access to stored model-price records, published vendor changes, and change.alert webhooks. Price rows are source-linked when source_url is present; effective_at and updated_at describe the stored record and do not assert an independent live-price verification. All /v1 responses are account-specific and use Cache-Control: private, no-store with Vary: Authorization.",
    "contact": {
      "name": "ModelPriceLab Support",
      "email": "support@modelpricelab.com"
    }
  },
  "servers": [
    {
      "url": "https://api.modelpricelab.com",
      "description": "Production"
    }
  ],
  "security": [
    {
      "BearerApiKey": []
    }
  ],
  "paths": {
    "/v1/prices": {
      "get": {
        "summary": "List stored price records",
        "description": "Returns stored, source-linked price records where available. API Free applies a 24-hour record-update delay. product is matched directly against the canonical products.id value and is never inferred from a resource id.",
        "operationId": "listPrices",
        "parameters": [
          {
            "name": "vendor",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact vendor id"
          },
          {
            "name": "product",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact canonical products.id value"
          },
          {
            "name": "platform",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact platform id, for example direct or openrouter"
          },
          {
            "name": "modality",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact modality, for example llm, image, audio, or video"
          },
          {
            "name": "since",
            "in": "query",
            "schema": { "type": "string", "format": "date-time" },
            "description": "Return rows whose record updated_at is at or after this date-time"
          },
          {
            "name": "cursor",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Opaque base64url cursor returned as pagination.next_cursor. Do not construct or modify it."
          },
          {
            "name": "limit",
            "in": "query",
            "schema": { "type": "integer", "minimum": 1, "maximum": 500, "default": 100 },
            "description": "Maximum rows returned"
          }
        ],
        "responses": {
          "200": {
            "description": "Stored price records in descending (updated_at, resource_id) order",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/PriceList" }
              }
            }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "403": { "$ref": "#/components/responses/Forbidden" },
          "429": { "$ref": "#/components/responses/RateLimited" },
          "503": { "$ref": "#/components/responses/Unavailable" }
        }
      }
    },
    "/v1/changes": {
      "get": {
        "summary": "List published changes",
        "description": "Returns published vendor changes. Operational incidents are excluded unless category=incident is explicit or include_incidents=true. This endpoint requires a current Developer, Scale, Team, or Enterprise entitlement.",
        "operationId": "listChanges",
        "parameters": [
          {
            "name": "vendor",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact vendor id"
          },
          {
            "name": "product",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact canonical products.id value"
          },
          {
            "name": "category",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Exact change category; category=incident explicitly includes incidents"
          },
          {
            "name": "include_incidents",
            "in": "query",
            "schema": { "type": "boolean", "default": false },
            "description": "Include operational incidents when category is not set"
          },
          {
            "name": "min_severity",
            "in": "query",
            "schema": { "type": "integer", "minimum": 1, "maximum": 5 },
            "description": "Minimum severity"
          },
          {
            "name": "since",
            "in": "query",
            "schema": { "type": "string", "format": "date-time" },
            "description": "Return rows whose updated_at is at or after this date-time"
          },
          {
            "name": "cursor",
            "in": "query",
            "schema": { "type": "string" },
            "description": "Opaque base64url cursor returned as pagination.next_cursor. Do not construct or modify it."
          },
          {
            "name": "limit",
            "in": "query",
            "schema": { "type": "integer", "minimum": 1, "maximum": 500, "default": 100 },
            "description": "Maximum rows returned"
          }
        ],
        "responses": {
          "200": {
            "description": "Published changes in descending (updated_at, id) order",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/ChangeList" }
              }
            }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "403": { "$ref": "#/components/responses/Forbidden" },
          "429": { "$ref": "#/components/responses/RateLimited" },
          "503": { "$ref": "#/components/responses/Unavailable" }
        }
      }
    },
    "/v1/webhooks": {
      "get": {
        "summary": "List webhook subscriptions",
        "description": "Lists the caller's webhook subscriptions. Signing secrets are write-only and are never returned.",
        "operationId": "listWebhooks",
        "responses": {
          "200": {
            "description": "Webhook subscriptions without signing secrets",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/WebhookList" }
              }
            }
          },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "403": { "$ref": "#/components/responses/Forbidden" },
          "429": { "$ref": "#/components/responses/RateLimited" },
          "503": { "$ref": "#/components/responses/Unavailable" }
        }
      },
      "post": {
        "summary": "Create a change-alert webhook",
        "description": "Registers an HTTPS endpoint. A current Developer/Scale api_subscriptions record or current Team/Enterprise subscriptions record is required; an account plan label alone is not delivery entitlement. Deliveries use event=change.alert. x-mpl-signature contains sha256=<hex HMAC-SHA256> over the exact raw UTF-8 request body. Developer allows two active webhooks; Scale is unlimited.",
        "operationId": "createWebhook",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": { "$ref": "#/components/schemas/WebhookInput" }
            }
          }
        },
        "responses": {
          "201": {
            "description": "Webhook created; the signing secret is not echoed",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/WebhookItem" }
              }
            }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "402": {
            "description": "Active webhook limit reached",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/Error" }
              }
            }
          },
          "403": { "$ref": "#/components/responses/Forbidden" },
          "429": { "$ref": "#/components/responses/RateLimited" },
          "503": { "$ref": "#/components/responses/Unavailable" }
        }
      }
    },
    "/v1/webhooks/{id}": {
      "delete": {
        "summary": "Delete a webhook subscription",
        "operationId": "deleteWebhook",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "string" }
          }
        ],
        "responses": {
          "200": {
            "description": "Webhook deleted",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["success"],
                  "properties": {
                    "success": { "type": "boolean", "enum": [true] }
                  }
                }
              }
            }
          },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "403": { "$ref": "#/components/responses/Forbidden" },
          "404": {
            "description": "Webhook not found for this owner",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/Error" }
              }
            }
          },
          "429": { "$ref": "#/components/responses/RateLimited" },
          "503": { "$ref": "#/components/responses/Unavailable" }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "BearerApiKey": {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "ModelPriceLab API key",
        "description": "Authorization: Bearer mpl_your_api_key"
      }
    },
    "responses": {
      "BadRequest": {
        "description": "Invalid query or request body",
        "content": {
          "application/json": {
            "schema": { "$ref": "#/components/schemas/Error" }
          }
        }
      },
      "Unauthorized": {
        "description": "Missing, invalid, or revoked API key",
        "content": {
          "application/json": {
            "schema": { "$ref": "#/components/schemas/Error" }
          }
        }
      },
      "Forbidden": {
        "description": "Endpoint is not included in the current entitlement",
        "content": {
          "application/json": {
            "schema": { "$ref": "#/components/schemas/Error" }
          }
        }
      },
      "RateLimited": {
        "description": "Daily API-key quota exceeded",
        "content": {
          "application/json": {
            "schema": { "$ref": "#/components/schemas/Error" }
          }
        }
      },
      "Unavailable": {
        "description": "Authorization or data store unavailable",
        "content": {
          "application/json": {
            "schema": { "$ref": "#/components/schemas/Error" }
          }
        }
      }
    },
    "schemas": {
      "Error": {
        "type": "object",
        "required": ["error", "message", "status"],
        "properties": {
          "error": { "type": "string" },
          "message": { "type": "string" },
          "status": { "type": "integer" },
          "upgrade_url": { "type": "string" }
        }
      },
      "Pagination": {
        "type": "object",
        "required": ["next_cursor"],
        "properties": {
          "next_cursor": {
            "type": "string",
            "description": "Opaque canonical base64url(JSON [updated_at, id]) tuple. Pass it back unchanged."
          }
        }
      },
      "PriceList": {
        "type": "object",
        "required": ["schema_version", "data"],
        "properties": {
          "schema_version": { "type": "integer", "enum": [1] },
          "data": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/Price" }
          },
          "pagination": { "$ref": "#/components/schemas/Pagination" }
        }
      },
      "Price": {
        "type": "object",
        "required": [
          "resource_id",
          "product_id",
          "vendor",
          "platform",
          "modality",
          "region",
          "unit",
          "input_per_mtok",
          "output_per_mtok",
          "cached_input_per_mtok",
          "image_per_unit",
          "audio_per_min",
          "video_per_sec",
          "currency",
          "source_url",
          "effective_at",
          "updated_at"
        ],
        "properties": {
          "resource_id": { "type": "string", "description": "Stable resources.id row identifier" },
          "product_id": { "type": "string", "nullable": true, "description": "Canonical products.id when linked" },
          "vendor": { "type": "string" },
          "platform": { "type": "string", "nullable": true },
          "modality": { "type": "string", "nullable": true },
          "region": { "type": "string", "nullable": true },
          "unit": { "type": "string", "nullable": true },
          "input_per_mtok": { "type": "number", "nullable": true },
          "output_per_mtok": { "type": "number", "nullable": true },
          "cached_input_per_mtok": { "type": "number", "nullable": true },
          "image_per_unit": { "type": "number", "nullable": true },
          "audio_per_min": { "type": "number", "nullable": true },
          "video_per_sec": { "type": "number", "nullable": true },
          "currency": { "type": "string", "nullable": true },
          "source_url": { "type": "string", "format": "uri", "nullable": true },
          "effective_at": { "type": "string", "description": "Source effective date when present, otherwise record updated_at" },
          "updated_at": { "type": "string", "format": "date-time", "description": "Stored record update time, not independent source verification" }
        }
      },
      "ChangeList": {
        "type": "object",
        "required": ["schema_version", "data"],
        "properties": {
          "schema_version": { "type": "integer", "enum": [1] },
          "data": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/Change" }
          },
          "pagination": { "$ref": "#/components/schemas/Pagination" }
        }
      },
      "Change": {
        "type": "object",
        "required": ["id", "vendor", "product", "modality", "category", "severity", "title", "summary", "impact_score", "first_seen", "last_seen", "created_at", "updated_at", "alternatives", "access"],
        "properties": {
          "id": { "type": "string" },
          "vendor": { "type": "string" },
          "product": { "type": "string", "description": "Canonical products.id value" },
          "modality": { "type": "string" },
          "category": { "type": "string" },
          "severity": { "type": "integer" },
          "title": { "type": "string" },
          "summary": { "type": "string" },
          "diff_before": { "type": "string", "nullable": true },
          "diff_after": { "type": "string", "nullable": true },
          "diff_keys": { "type": "string", "nullable": true },
          "impact_score": { "type": "integer" },
          "impact_cost": { "type": "integer", "nullable": true },
          "impact_reliability": { "type": "integer", "nullable": true },
          "impact_migration": { "type": "integer", "nullable": true },
          "impact_quality": { "type": "integer", "nullable": true },
          "impact_compliance": { "type": "integer", "nullable": true },
          "impact_notes": { "type": "string", "nullable": true },
          "migration_deadline": { "type": "string", "nullable": true },
          "effective_time": { "type": "string", "nullable": true },
          "first_seen": { "type": "string" },
          "last_seen": { "type": "string" },
          "verified": { "type": "boolean", "nullable": true },
          "verified_at": { "type": "string", "nullable": true },
          "status": { "type": "string", "nullable": true },
          "view_count": { "type": "integer", "nullable": true },
          "created_at": { "type": "string", "format": "date-time" },
          "updated_at": { "type": "string", "format": "date-time" },
          "alternatives": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/ChangeAlternative" }
          },
          "access": { "type": "string", "enum": ["summary", "full"] }
        }
      },
      "ChangeAlternative": {
        "type": "object",
        "required": ["id", "change_id", "product_id", "product_name", "vendor", "migration_effort", "rank", "created_at"],
        "properties": {
          "id": { "type": "string" },
          "change_id": { "type": "string" },
          "product_id": { "type": "string" },
          "product_name": { "type": "string" },
          "vendor": { "type": "string" },
          "migration_effort": { "type": "string" },
          "cost_diff_pct": { "type": "number", "nullable": true },
          "quality_comparison": { "type": "string", "nullable": true },
          "notes": { "type": "string", "nullable": true },
          "rank": { "type": "integer" },
          "created_at": { "type": "string", "format": "date-time" }
        }
      },
      "WebhookList": {
        "type": "object",
        "required": ["data"],
        "properties": {
          "data": {
            "type": "array",
            "items": { "$ref": "#/components/schemas/Webhook" }
          }
        }
      },
      "WebhookItem": {
        "type": "object",
        "required": ["data"],
        "properties": {
          "data": { "$ref": "#/components/schemas/Webhook" }
        }
      },
      "Webhook": {
        "type": "object",
        "required": ["id", "url", "events", "active", "has_secret", "created_at", "updated_at"],
        "properties": {
          "id": { "type": "string" },
          "url": { "type": "string", "format": "uri" },
          "events": {
            "type": "array",
            "items": { "type": "string", "enum": ["change.alert", "*"] }
          },
          "active": { "type": "boolean" },
          "has_secret": { "type": "boolean" },
          "last_status": { "type": "integer", "nullable": true },
          "last_error": { "type": "string", "nullable": true },
          "created_at": { "type": "string", "format": "date-time" },
          "updated_at": { "type": "string", "format": "date-time" }
        }
      },
      "WebhookInput": {
        "type": "object",
        "required": ["url", "secret"],
        "properties": {
          "url": { "type": "string", "format": "uri", "pattern": "^https://" },
          "events": {
            "type": "array",
            "minItems": 1,
            "uniqueItems": true,
            "default": ["change.alert"],
            "items": { "type": "string", "enum": ["change.alert", "*"] }
          },
          "secret": {
            "type": "string",
            "minLength": 16,
            "maxLength": 512,
            "writeOnly": true,
            "description": "HMAC signing secret. It is stored for delivery signing and is never returned by the API."
          }
        }
      },
      "WebhookDelivery": {
        "type": "object",
        "required": ["event", "timestamp", "changes"],
        "properties": {
          "event": { "type": "string", "enum": ["change.alert"] },
          "timestamp": { "type": "string", "format": "date-time" },
          "changes": {
            "type": "array",
            "items": {
              "type": "object",
              "required": ["id", "vendor", "product", "severity", "title", "summary", "category", "url"],
              "properties": {
                "id": { "type": "string" },
                "vendor": { "type": "string" },
                "product": { "type": "string" },
                "severity": { "type": "integer" },
                "title": { "type": "string" },
                "summary": { "type": "string" },
                "category": { "type": "string" },
                "url": { "type": "string", "format": "uri" }
              }
            }
          }
        }
      }
    }
  }
}