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Missing OPENROUTER_API_KEY

Cause: OPENROUTER_API_KEY was not set. Fix: add it to .env or your deployment env vars, then restart.

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401 unauthorized

Cause: incoming key does not match ASTROLABE_API_KEY. Fix: send Authorization: Bearer <your_astrolabe_key> (or x-api-key).

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Need full JSON instead of SSE

Cause: streaming is default behavior. Fix: send "stream": false in the request body.

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Upstream OpenRouter errors

Check:
  1. Key validity and credits
  2. Model availability
  3. Request payload shape
  4. OpenRouter service status

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est_usd=n/a in logs

Cause: upstream usage fields were omitted. Fix: this is expected for some providers/responses; cost estimation requires token usage.