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A Retry Is a Duplicate Waiting to Happen: Idempotency for Free Model Endpoints

This story is from 2026-08-25. It is preserved in the archive; the latest stories are on the live feed.

Retries fix 429s, but they also create duplicates. A client times out while the server already processed the request. The retry sends the same prompt again. You burn quota twice. You get two different answers. This is the silent tax of free endpoints. The fix is an idempotency key. One key per logi…

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  1. 2026-08-25 00:04 · DEV Community — AI
    A Retry Is a Duplicate Waiting to Happen: Idempotency for Free Model Endpoints

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