{
  "openapi": "3.1.0",
  "info": {
    "title": "Tangle Router API",
    "version": "2026-06-16",
    "description": "OpenAI-compatible model routing, model discovery, health, and status endpoints for Tangle Router."
  },
  "servers": [
    {
      "url": "https://router.tangle.tools"
    }
  ],
  "security": [
    {
      "bearerAuth": []
    }
  ],
  "paths": {
    "/api/health": {
      "get": {
        "operationId": "getHealth",
        "summary": "Read Router health.",
        "security": [],
        "responses": {
          "200": {
            "description": "Health payload.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "status": { "type": "string" },
                    "timestamp": { "type": "number" }
                  },
                  "additionalProperties": true
                }
              }
            }
          }
        }
      }
    },
    "/api/status": {
      "get": {
        "operationId": "getStatus",
        "summary": "Read Router status.",
        "security": [],
        "responses": {
          "200": {
            "description": "Status payload.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "additionalProperties": true
                }
              }
            }
          }
        }
      }
    },
    "/v1/models": {
      "get": {
        "operationId": "listModels",
        "summary": "List available model routes.",
        "security": [],
        "responses": {
          "200": {
            "description": "OpenAI-compatible model list.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "data": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "id": { "type": "string" },
                          "object": { "type": "string" }
                        },
                        "additionalProperties": true
                      }
                    }
                  },
                  "additionalProperties": true
                }
              }
            }
          }
        }
      }
    },
    "/v1/chat/completions": {
      "post": {
        "operationId": "createChatCompletion",
        "summary": "Create an OpenAI-compatible chat completion.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/ChatCompletionRequest"
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Chat completion or streaming response.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "additionalProperties": true
                }
              },
              "text/event-stream": {
                "schema": {
                  "type": "string"
                }
              }
            }
          },
          "401": {
            "description": "Missing or invalid API key."
          },
          "402": {
            "description": "Payment required."
          },
          "429": {
            "description": "Rate limit exceeded."
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "TANGLE_API_KEY"
      }
    },
    "schemas": {
      "ChatCompletionRequest": {
        "type": "object",
        "required": ["model", "messages"],
        "properties": {
          "model": { "type": "string" },
          "messages": {
            "type": "array",
            "items": {
              "type": "object",
              "required": ["role", "content"],
              "properties": {
                "role": {
                  "type": "string",
                  "enum": ["system", "user", "assistant", "tool"]
                },
                "content": {
                  "oneOf": [
                    { "type": "string" },
                    { "type": "array" }
                  ]
                }
              },
              "additionalProperties": true
            }
          },
          "stream": { "type": "boolean" },
          "temperature": { "type": "number" },
          "max_tokens": { "type": "integer" }
        },
        "additionalProperties": true
      }
    }
  }
}