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fix(mcp): make stateless_http configurable and session-capable by default #230

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fix(mcp): make stateless_http configurable and session-capable by default #230

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5 changes: 4 additions & 1 deletion ex_app/lib/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,10 @@
mcp = FastMCP(name="nextcloud")
mcp.add_middleware(UserAuthMiddleware())
mcp.add_middleware(ToolListMiddleware(mcp))
http_mcp_app = mcp.http_app("/", transport="http", stateless_http=True)
# Session-capable by default: SDK >= 1.28 clients keep the session after initialize
# and fail with "Session terminated" when the transport is stateless. See #227.
_stateless_http = os.getenv("MCP_STATELESS_HTTP", "0").lower() in ("1", "true", "yes")
http_mcp_app = mcp.http_app("/", transport="http", stateless_http=_stateless_http)

fast_app = FastAPI(lifespan=http_mcp_app.lifespan)

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