{
  "openapi": "3.0.3",
  "info": {
    "title": "mzapayments API",
    "version": "1.0.0",
    "description": "Merchant REST API for invoices, payments, and payment links."
  },
  "servers": [{ "url": "/api/v1" }],
  "security": [{ "bearerAuth": [] }],
  "paths": {
    "/currencies": {
      "get": {
        "summary": "List supported currencies",
        "responses": { "200": { "description": "OK" } }
      }
    },
    "/estimate": {
      "get": {
        "summary": "Estimate crypto amount for a fiat total",
        "responses": { "200": { "description": "OK" } }
      }
    },
    "/invoices": {
      "get": { "summary": "List invoices", "responses": { "200": { "description": "OK" } } },
      "post": { "summary": "Create invoice", "responses": { "201": { "description": "Created" } } }
    },
    "/invoices/{id}": {
      "get": {
        "summary": "Get invoice",
        "parameters": [{ "name": "id", "in": "path", "required": true, "schema": { "type": "string" } }],
        "responses": { "200": { "description": "OK" } }
      }
    },
    "/payments": {
      "get": { "summary": "List payments", "responses": { "200": { "description": "OK" } } }
    },
    "/payments/{id}": {
      "get": {
        "summary": "Get payment",
        "parameters": [{ "name": "id", "in": "path", "required": true, "schema": { "type": "string" } }],
        "responses": { "200": { "description": "OK" } }
      }
    },
    "/payment-links": {
      "get": { "summary": "List payment links", "responses": { "200": { "description": "OK" } } },
      "post": { "summary": "Create payment link", "responses": { "201": { "description": "Created" } } }
    },
    "/webhooks": {
      "get": { "summary": "List webhook endpoints", "responses": { "200": { "description": "OK" } } },
      "post": { "summary": "Register webhook endpoint", "responses": { "201": { "description": "Created" } } }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer",
        "description": "Merchant API secret key"
      }
    }
  }
}