{
  "openapi": "3.0.3",
  "info": {
    "title": "SnapAPI",
    "description": "Website screenshot, metadata extraction, PDF generation, and text extraction API. Powered by headless Chromium.",
    "version": "1.0.0",
    "contact": { "url": "https://snap.michaelcli.com" }
  },
  "servers": [
    { "url": "https://snap.michaelcli.com", "description": "Production" }
  ],
  "security": [{ "ApiKeyAuth": [] }],
  "paths": {
    "/api/signup": {
      "post": {
        "summary": "Create free API key",
        "description": "Sign up for a free API key (50 requests/month). No credit card required.",
        "security": [],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["email", "name"],
                "properties": {
                  "email": { "type": "string", "format": "email", "example": "dev@example.com" },
                  "name": { "type": "string", "example": "My App" }
                }
              }
            }
          }
        },
        "responses": {
          "201": {
            "description": "API key created",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "key": { "type": "string", "example": "snap_abc123..." },
                    "name": { "type": "string" },
                    "tier": { "type": "string", "example": "free" },
                    "message": { "type": "string" }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/api/screenshot": {
      "post": {
        "summary": "Take website screenshot",
        "description": "Capture a screenshot of any URL. Returns PNG or JPEG image data.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["url"],
                "properties": {
                  "url": { "type": "string", "format": "uri", "example": "https://github.com" },
                  "width": { "type": "integer", "minimum": 320, "maximum": 3840, "default": 1280 },
                  "height": { "type": "integer", "minimum": 240, "maximum": 2160, "default": 720 },
                  "full_page": { "type": "boolean", "default": false },
                  "format": { "type": "string", "enum": ["png", "jpeg"], "default": "png" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Screenshot image",
            "headers": {
              "X-Usage-Used": { "schema": { "type": "integer" }, "description": "Requests used this month" },
              "X-Usage-Limit": { "schema": { "type": "integer" }, "description": "Monthly request limit" }
            },
            "content": {
              "image/png": { "schema": { "type": "string", "format": "binary" } },
              "image/jpeg": { "schema": { "type": "string", "format": "binary" } }
            }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "429": { "$ref": "#/components/responses/RateLimited" }
        }
      }
    },
    "/api/metadata": {
      "post": {
        "summary": "Extract website metadata",
        "description": "Extract title, description, Open Graph tags, Twitter Cards, favicons, and all meta tags from any URL.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["url"],
                "properties": {
                  "url": { "type": "string", "format": "uri", "example": "https://github.com" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Metadata extracted successfully",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "data": {
                      "type": "object",
                      "properties": {
                        "url": { "type": "string" },
                        "title": { "type": "string" },
                        "description": { "type": "string" },
                        "favicon": { "type": "string" },
                        "og": { "type": "object", "additionalProperties": { "type": "string" } },
                        "twitter": { "type": "object", "additionalProperties": { "type": "string" } },
                        "meta_tags": {
                          "type": "array",
                          "items": {
                            "type": "object",
                            "properties": {
                              "name": { "type": "string" },
                              "content": { "type": "string" }
                            }
                          }
                        }
                      }
                    },
                    "usage": {
                      "type": "object",
                      "properties": {
                        "used": { "type": "integer" },
                        "limit": { "type": "integer" }
                      }
                    }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "429": { "$ref": "#/components/responses/RateLimited" }
        }
      }
    },
    "/api/pdf": {
      "post": {
        "summary": "Generate PDF from URL",
        "description": "Convert any web page to a PDF document. Supports A4, Letter, and other page formats.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["url"],
                "properties": {
                  "url": { "type": "string", "format": "uri", "example": "https://example.com" },
                  "format": { "type": "string", "enum": ["A4", "Letter", "Legal", "Tabloid"], "default": "A4" },
                  "landscape": { "type": "boolean", "default": false }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "PDF document",
            "content": { "application/pdf": { "schema": { "type": "string", "format": "binary" } } }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "429": { "$ref": "#/components/responses/RateLimited" }
        }
      }
    },
    "/api/text": {
      "post": {
        "summary": "Extract text from URL",
        "description": "Extract the visible text content from any web page, with word count.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["url"],
                "properties": {
                  "url": { "type": "string", "format": "uri", "example": "https://example.com" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Text extracted successfully",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "data": {
                      "type": "object",
                      "properties": {
                        "url": { "type": "string" },
                        "title": { "type": "string" },
                        "text": { "type": "string" },
                        "word_count": { "type": "integer" }
                      }
                    },
                    "usage": {
                      "type": "object",
                      "properties": {
                        "used": { "type": "integer" },
                        "limit": { "type": "integer" }
                      }
                    }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/BadRequest" },
          "401": { "$ref": "#/components/responses/Unauthorized" },
          "429": { "$ref": "#/components/responses/RateLimited" }
        }
      }
    },
    "/api/usage": {
      "get": {
        "summary": "Check API usage",
        "description": "Get your current month's API usage and limits.",
        "responses": {
          "200": {
            "description": "Usage info",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "tier": { "type": "string" },
                    "used": { "type": "integer" },
                    "limit": { "type": "integer" },
                    "remaining": { "type": "integer" }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "ApiKeyAuth": {
        "type": "apiKey",
        "in": "header",
        "name": "X-API-Key"
      }
    },
    "responses": {
      "BadRequest": {
        "description": "Invalid request",
        "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } }
      },
      "Unauthorized": {
        "description": "Missing or invalid API key",
        "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } }
      },
      "RateLimited": {
        "description": "Monthly request limit exceeded",
        "content": {
          "application/json": {
            "schema": {
              "type": "object",
              "properties": {
                "error": { "type": "string" },
                "limit": { "type": "integer" },
                "used": { "type": "integer" },
                "tier": { "type": "string" }
              }
            }
          }
        }
      }
    },
    "schemas": {
      "Error": {
        "type": "object",
        "properties": {
          "error": { "type": "string" }
        }
      }
    }
  }
}