Fireworks AI API Key Tester

Test any AI or API key in your browser — instantly see if it's valid, and why it isn't. Nothing is stored.

Test your Fireworks AI API key with the models endpoint

Data verified 2026-07-13

Key format & how to get one

Prefix: fw_ Example: fw_abc123... Fireworks AI keys start with fw_. 1. Sign in at https://fireworks.ai 2. Open Settings > API Keys 3. Create a key and copy it (starts with fw_) 4. New accounts include starter credit

How to test

  1. Copy your key from fireworks.ai (Settings > API Keys).
  2. Paste it into the tester above and click Test Key.
  3. Green means valid; red shows the exact error and fix.

Common errors

CauseFix
Invalid or revoked key.Create a new key at fireworks.ai (Settings > API Keys).
Rate limit exceeded.Wait a few seconds and retry, or upgrade your plan.

Fireworks AI API docs →

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