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NEUS APIs may return 429 or short-lived errors.
  • Use exponential backoff and respect Retry-After when the response includes it.
  • When creating proofs, avoid blind retries — confirm whether the first request succeeded before posting again.
  • For polling, space requests a few seconds apart and back off on errors.
Credits, tiers, and pay-per-use: Billing.

Billing

Credits and usage.

SDK error handling

Retries in code.

API overview

Endpoints.