refactor(mcp): migrate from MCP SDK v1 to v2.0.0b1#112
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Breaking changes applied: - streamablehttp_client → streamable_http_client (renamed import) - McpError → MCPError (exception renamed) - mcp.types → mcp_types (split into separate package) - FastMCP → MCPServer (base class renamed) - SSLCapableFastMCP → SSLCapableMCPServer - MCPServer.__init__ no longer accepts host/port/transport_security; these are passed to run methods and streamable_http_app() instead - streamable_http_client returns 2-tuple (read, write) instead of 3-tuple; session ID tracking and manual termination removed (terminate_on_close=True) - Remove _http_client_factory; use pre-built httpx.AsyncClient directly - Replace self.settings.host/port with self.server_config.host/port Deprecations removed: - __terminate_http_session(), _session_id, _get_session_id, _http_client_factory Tests: 190 passing
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Summary
Migrates all MCP client and server code from MCP Python SDK v1 → v2.0.0b1, applying every breaking API change.
Breaking Changes Applied
streamablehttp_clientstreamable_http_clientMcpErrorMCPErrormcp.typesmcp_types(separate package)FastMCPMCPServerSSLCapableFastMCPSSLCapableMCPServerMCPServer(host=..., port=...)host/portpassed to run methods onlystreamable_http_clientreturns(read, write, get_session_id)(read, write)Behavioral Changes
__terminate_http_session(); v2 SDK handles DELETE viaterminate_on_close=True_http_client_factorypattern with pre-builthttpx.AsyncClienttransport_securitynow stored as instance attr and passed tostreamable_http_app()instead of__init__self.settings.host/port→self.server_config.host/portRemoved
_session_id,_get_session_id,_http_client_factory,__terminate_http_sessionTestTerminateHTTPSession,TestTerminateHTTPSessionErrors,TestHTTPClientFactory)Tests
All 190 MCP unit tests pass.
Dependencies
mcp == 2.0.0b1mcp-types == 2.0.0b1Migration guide reference
https://py.sdk.modelcontextprotocol.io/v2/migration/