Support the MCP 2026-07-28 specification ("MCP 2.0") - #24
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Upgrade to FastMCP 4, the first release implementing the 2026-07-28 MCP revision. The server now answers server/discover and tools/list with no initialize handshake and no Mcp-Session-Id, and still serves handshake-era clients on 2025-11-25 from the same /mcp endpoint, so the xAI hosted MCP client used by test_grok_mcp.py keeps working unchanged. - Pin fastmcp>=4.0.0b1 and swap httpx for httpx2, which FastMCP 4 uses. The X API client and all four event hooks (OAuth1 signing, comma-joined array query params, request/response logging) move across unchanged. - Drop the FASTMCP_EXPERIMENTAL_ENABLE_NEW_OPENAPI_PARSER passthrough; that setting no longer exists in FastMCP 4. - Advertise a server version and 2.0 cache hints on tools/list and server/discover. The tool set is derived from the OpenAPI spec once at startup and is immutable for the life of the process, so it is genuinely cacheable. Tunable via MCP_CACHE_TTL (default 300s). - Document the protocol behavior, bump the stated Python floor to 3.10 to match FastMCP 4, and correct a stale README line about the spec being fetched from api.twitter.com. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Support the MCP 2026-07-28 specification ("MCP 2.0")
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Upgrade to FastMCP 4, the first release implementing the 2026-07-28 MCP revision. The server now answers server/discover and tools/list with no initialize handshake and no Mcp-Session-Id, and still serves handshake-era clients on 2025-11-25 from the same /mcp endpoint, so the xAI hosted MCP client used by test_grok_mcp.py keeps working unchanged.