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A few times a day, and never on your laptop, the Node service that calls your Python API logs this.

TypeError: fetch failed cause: Error: read ECONNRESET { code: 'ECONNRESET' }

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On other days it's the cousin, the one people paste into search boxes word for word.

TypeError: fetch failed SocketError: other side closed at Socket.onHttpSocketEnd (node:internal/deps/undici/undici:7147:26)

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curl against the same URL works. A retry works. Somebody already doubled the timeout and nothing changed. It's the bug that only shows up when nobody is watching.

Both messages usually point to one bug: your client reuses an idle connection at the same moment the server closes it. About 30 lines of code reproduce it, and three fixes get before and after numbers.…