Upstream request failed: Endpoint is unavailable. #42750

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1. github-actions

   assigned

   jlongster

   on Aug 15, 2026
2. github-actions commented on Aug 15, 2026

   

   github-actionsBot

   on Aug 15, 2026 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • OpenCode Go service (zen/go/v1) frequent intermittent outages — HTTP 000 / 503 / Cloudflare 524 #36889: OpenCode Go service frequent intermittent outages (HTTP 000 / 503 / Cloudflare 524) — covers the same "Endpoint is unavailable" / service unreachable pattern with retry loops
   • [Zen Free Tier] Free models connection frequently unstable (upstream failures/timeouts); request stable endpoints + more strong coding models #41236: Zen Free Tier free models connection frequently unstable (upstream failures/timeouts) — similar upstream failure with retries on Windows
   • Both OpenCode Go & Zen are down #41011: Both OpenCode Go & Zen are down — general service availability reports

   If your issue matches one of these, please add a comment there instead. If it's a different root cause (e.g. a specific model, a specific error code, or a regression), please add more details to help distinguish it.
3. its-Hans commented on Aug 15, 2026

   

   its-Hans

   on Aug 15, 2026

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   大伙只能帮你算一卦

   👍React with 👍3Reacted by 郭文杰, 星灿长风v and YANG JIANFEI
4. shashankgfx commented on Aug 15, 2026

   

   shashankgfx

   on Aug 15, 2026

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   Potential fix/workaround: I was running opencode in keyless mode (no login). All other free models worked, but deepseek-v4-flash-free kept failing with 'Upstream request failed: Endpoint is unavailable.' I created a fresh API key from the OpenCode Zen dashboard, connected with that key instead of keyless mode, and everything works now. Suspect keyless/anonymous Zen requests get deprioritized or routed differently on the free DeepSeek lane.
5. SANFY666 commented on Aug 15, 2026

   

   SANFY666

   on Aug 15, 2026

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   now it works

   👍React with 👍1Reacted by shashankgfx
6. neriousy commented on Oct 1, 2026

   

   neriousy

   on Oct 1, 2026

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   Closing: "Upstream request failed: Endpoint is unavailable" was a temporary gateway outage around Aug 15-17 that has since been resolved. If you still see it on the latest version, please open a new issue with the model and time of the failure. Some cases were caused by the console privacy region setting (Settings → Privacy), so check that too.
7. neriousy

   closed this as not plannedon Oct 1, 2026
8. alekseyHunter commented on Oct 8, 2026

   

   alekseyHunter

   on Oct 8, 2026

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   Такая же ошибка "Upstream request failed: Endpoint is unavailable." для подписки Go - модель LongCat 2.5 Preview Free. Без подписки, в бесплатном режиме модель работает.