{
  "id": "mcp-transport:streamable-http",
  "_kind": "MCPTransport",
  "_file": "compute/mcp-transports/streamable-http.yaml",
  "_cluster": "compute",
  "attributes": {
    "displayName": "Streamable HTTP",
    "kind": "streamable-http",
    "specVersion": "2025-03-26",
    "currentSpecRevision": "2025-11-25",
    "specRevisions": [
      "2025-03-26",
      "2025-06-18",
      "2025-11-25"
    ],
    "status": "live",
    "streaming": "full",
    "specUrl": "https://modelcontextprotocol.io/specification/2025-11-25/basic/transports#streamable-http",
    "connectionLifecycle": "Single MCP endpoint, dual-direction over HTTP:\n  1. Client POSTs `initialize` to the MCP endpoint URL.\n  2. Server responds 200 with `initialize` result; if it returns the\n     `Mcp-Session-Id` response header, the client MUST echo it on\n     every subsequent request as `Mcp-Session-Id: <id>`.\n  3. Client POSTs `notifications/initialized`. Session is ready.\n  4. Client may also open a long-lived GET on the same endpoint\n     requesting `Accept: text/event-stream` to receive server-pushed\n     notifications/requests asynchronously (the \"listen\" channel).\n  5. Shutdown: client may DELETE the endpoint with the session id to\n     explicitly terminate; server may end the session by responding\n     404 to a session-bearing request.\n",
    "capabilityNegotiation": "Identical to stdio: `initialize` request/response carrying\n`protocolVersion`, `clientInfo`/`serverInfo`, and the `capabilities`\nobject. The protocol version negotiated here MUST match the value\nsent on subsequent requests via the `MCP-Protocol-Version` header\n(mandatory from spec revision 2025-06-18).\n",
    "notificationModel": "Two notification paths:\n  - Server-to-client notifications/requests are delivered as SSE\n    `message` events on the long-lived GET stream (or on the SSE body\n    of a POST response while a request is in-flight).\n  - Client-to-server notifications are sent as POST bodies with no\n    `id`; server returns 202 Accepted with empty body.\nServer SHOULD include an `id:` SSE field on each event to enable\n`Last-Event-ID`-based resumption.\n",
    "reconnectPolicy": "Session-scoped reconnect via `Mcp-Session-Id`:\n  - On connection loss, client reopens the GET listen channel with\n    the same `Mcp-Session-Id` and `Last-Event-ID: <last>` to resume\n    the SSE stream from the last successfully received event.\n  - If the server responds 404 to the resumed request, the session\n    is gone; the client must redo `initialize`.\n",
    "authentication": "Bearer tokens via the standard `Authorization` header\n(`Authorization: Bearer <token>`). From spec revision 2025-06-18 the\nserver is classified as an OAuth 2.1 Resource Server; client obtains\ntokens via OAuth Authorization Code + PKCE against an Authorization\nServer discovered through `WWW-Authenticate` / RFC 9728 protected-\nresource metadata, with RFC 8707 Resource Indicators binding tokens\nto the MCP endpoint URL.\n",
    "streamingFraming": "SSE on response bodies: each event is `event: message\\ndata: <json>\\n\\n`\n(event name `message` carrying a single JSON-RPC message). Servers\nSHOULD attach an `id:` field per event for resumption. JSON-RPC\nmessage-id discipline is standard. The 2025-06-18 revision removed\nJSON-RPC batch arrays — every HTTP body carries exactly one JSON-RPC\nmessage.\nMandatory request header from spec 2025-06-18: `MCP-Protocol-Version: <rev>`.\n"
  },
  "outgoingEdges": [
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      "kind": "spoken_by",
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      "attributes": {}
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      "kind": "spoken_by",
      "attributes": {}
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      "attributes": {}
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  ],
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}