xAI Grok 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 xAI Grok API key (api.x.ai) with the models endpoint. Note: xAI Grok is NOT the same as Groq — if you have a gsk_ key, use the Groq tester instead.
Data verified 2026-07-13
Key format & how to get one
Prefix: xai- Example: xai-abc123... xAI Grok keys start with xai- and are used at api.x.ai. This is not Groq (gsk_ keys at console.groq.com). 1. Sign in at https://console.x.ai 2. Open API Keys and create a key 3. Copy the key (starts with xai-) 4. xAI Grok (api.x.ai) is different from Groq (console.groq.com)
How to test
- Copy your key from console.x.ai (it starts with xai-).
- Paste it into the tester above and click Test Key.
- Green means valid; red shows the error. A 400/401 often means a Groq key was used by mistake.
Common errors
| Cause | Fix |
|---|---|
| The key is malformed, or you're using a Groq (gsk_) key by mistake. | Use an xai- key from console.x.ai. For gsk_ keys, use the Groq tester. |
| Invalid or revoked xAI key. | Create a new key at console.x.ai and paste it here. |
| Rate limit exceeded. | Wait a few seconds and retry. |
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