MCP

{
  "servers": [
    {
      "server": {
        "name": "my-remote-server",
        "title": "My server",
        "description": "My server description",
        "version": "1.0.0",
        "remotes": [
          {
            "type": "streamable-http",
            "url": "https://acme.com/my-server",
            "headers": [
              {
                "name": "X-My-Header",
                "value": "SomeValue"
              }
            ]
          }
        ]
      }
    },
    {
      "server": {
        "name": "my-local-server",
        "title": "My server",
        "description": "My server description",
        "version": "1.0.0",
        "packages": [
          {
            "registryType": "npm",
            "registryBaseUrl": "https://npm.acme.com",
            "identifier": "@acme/my-server",
            "transport": {
              "type": "stdio"
            },
            "runtimeArguments": [
              {
                "type": "positional",
                "value": "-q"
              }
            ],
            "packageArguments": [
              {
                "type": "positional",
                "value": "start"
              }
            ],
            "environmentVariables": [
              {
                "name": "ENV_VAR",
                "value": "ENV_VAR_VALUE"
              }
            ]
          }
        ]
      }
    }
  ]
}

{
  "$schema": "https://json-schema.org/draft-07/schema",
  "properties": {
    "servers": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "server": {
            "$ref": "#/definitions/ServerDetail"
          }
        },
        "required": [
          "server"
        ]
      }
    }
  },
  "definitions": {
    "ServerDetail": {
      "properties": {
        "name": {
          "description": "Server name. Must be unique within a given registry file.",
          "example": "weather-mcp",
          "maxLength": 200,
          "minLength": 3,
          "pattern": "^[a-zA-Z0-9._-]+$",
          "type": "string"
        },
        "title": {
          "description": "Optional human-readable title or display name for the MCP server. MCP subregistries or clients MAY choose to use this for display purposes.",
          "example": "Weather API",
          "maxLength": 100,
          "minLength": 1,
          "type": "string"
        },
        "description": {
          "description": "Clear human-readable explanation of server functionality. Should focus on capabilities, not implementation details.",
          "example": "MCP server providing weather data and forecasts via OpenWeatherMap API",
          "maxLength": 100,
          "minLength": 1,
          "type": "string"
        },
        "version": {
          "description": "Version string for this server. SHOULD follow semantic versioning (e.g., '1.0.2', '2.1.0-alpha'). Equivalent of Implementation.version in MCP specification. Non-semantic versions are allowed but may not sort predictably. Version ranges are rejected (e.g., '^1.2.3', '~1.2.3', '\u003e=1.2.3', '1.x', '1.*').",
          "example": "1.0.2",
          "maxLength": 255,
          "type": "string"
        },
        "packages": {
          "items": {
            "$ref": "#/definitions/Package"
          },
          "type": "array",
          "minItems": 0,
          "maxItems": 1
        },
        "remotes": {
          "items": {
            "anyOf": [
              {
                "$ref": "#/definitions/StreamableHttpTransport"
              },
              {
                "$ref": "#/definitions/SseTransport"
              }
            ]
          },
          "type": "array",
          "minItems": 0,
          "maxItems": 1
        }
      },
      "required": [
        "name",
        "description",
        "version"
      ],
      "type": "object"
    },
    "Package": {
      "properties": {
        "registryType": {
          "description": "Registry type indicating how to download packages (e.g., 'npm', 'pypi', 'oci')",
          "enum": [
            "npm",
            "pypi",
            "oci"
          ],
          "type": "string"
        },
        "registryBaseUrl": {
          "description": "Base URL of the package registry",
          "examples": [
            "https://registry.npmjs.org",
            "https://pypi.org",
            "https://docker.io"
          ],
          "format": "uri",
          "type": "string"
        },
        "identifier": {
          "description": "Package identifier - either a package name (for registries) or URL (for direct downloads)",
          "examples": [
            "@modelcontextprotocol/server-brave-search",
            "https://github.com/example/releases/download/v1.0.0/package.mcpb"
          ],
          "type": "string"
        },
        "transport": {
          "anyOf": [
            {
              "$ref": "#/definitions/StdioTransport"
            },
            {
              "$ref": "#/definitions/StreamableHttpTransport"
            },
            {
              "$ref": "#/definitions/SseTransport"
            }
          ],
          "description": "Transport protocol configuration for the package"
        },

        "runtimeArguments": {
          "description": "A list of arguments to be passed to the package's runtime command (such as docker or npx).",
          "items": {
            "$ref": "#/definitions/PositionalArgument"
          },
          "type": "array"
        },
        "packageArguments": {
          "description": "A list of arguments to be passed to the package's binary.",
          "items": {
            "$ref": "#/definitions/PositionalArgument"
          },
          "type": "array"
        },
        "environmentVariables": {
          "description": "A mapping of environment variables to be set when running the package.",
          "items": {
            "$ref": "#/definitions/KeyValueInput"
          },
          "type": "array"
        }
      },
      "required": [
        "registryType",
        "identifier",
        "transport"
      ],
      "type": "object"
    },
    "StdioTransport": {
      "properties": {
        "type": {
          "description": "Transport type",
          "enum": [
            "stdio"
          ],
          "example": "stdio",
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    },
    "StreamableHttpTransport": {
      "properties": {
        "type": {
          "description": "Transport type",
          "enum": [
            "streamable-http"
          ],
          "example": "streamable-http",
          "type": "string"
        },
        "url": {
          "description": "URL template for the streamable-http transport. Variables in {curly_braces} reference argument valueHints, argument names, or environment variable names. After variable substitution, this should produce a valid URI.",
          "example": "https://api.example.com/mcp",
          "type": "string"
        },
        "headers": {
          "description": "HTTP headers to include",
          "items": {
            "$ref": "#/definitions/KeyValueInput"
          },
          "type": "array"
        }
      },
      "required": [
        "type",
        "url"
      ],
      "type": "object"
    },
    "SseTransport": {
      "properties": {
        "type": {
          "description": "Transport type",
          "enum": [
            "sse"
          ],
          "example": "sse",
          "type": "string"
        },
        "url": {
          "description": "Server-Sent Events endpoint URL",
          "example": "https://mcp-fs.example.com/sse",
          "format": "uri",
          "type": "string"
        },
        "headers": {
          "description": "HTTP headers to include",
          "items": {
            "$ref": "#/definitions/KeyValueInput"
          },
          "type": "array"
        }
      },
      "required": [
        "type",
        "url"
      ],
      "type": "object"
    },
    "PositionalArgument": {
      "properties": {
        "type": {
          "enum": [
            "positional"
          ],
          "example": "positional",
          "type": "string"
        },
        "value": {
          "description": "The value for the input.",
          "type": "string"
        }
      },
      "required": [
        "type",
        "value"
      ],
      "type": "object"
    },
    "KeyValueInput": {
      "properties": {
        "name": {
          "description": "Name of the header or environment variable.",
          "example": "SOME_VARIABLE",
          "type": "string"
        },
        "value": {
          "description": "The value for the input.",
          "type": "string"
        }
      },
      "required": [
        "name"
      ],
      "type": "object"
    }
  },
  "required": [
    "servers"
  ],
  "type": "object"
}