Grok Error Calling Moderation Service

Quick fix

1. Wait a minute and resend the same prompt. This error is usually transient — it means xAI's moderation service did not answer in time, not that your account has been flagged.
2. Check the live Grok status page. If xAI is having an incident, the moderation layer is often overloaded and retrying later is the only fix.
3. Simplify the prompt. Split multi-part requests into shorter messages and remove long pasted-in text you don't need.
4. Rephrase wording that could trip the safety filters. Graphic, sexual, or violent phrasing — even quoted or fictional — can make the moderation call fail instead of returning a clean refusal.
5. On the Grok API, treat this as a retryable server-side error: retry with exponential backoff instead of tight loops.

What this error means

Every Grok request passes through xAI's moderation service before the model generates a reply. "Error calling moderation service" appears when that check times out or errors, so the request is aborted before generation. It is different from a refusal: with a refusal, moderation worked and chose to block the prompt; here, the moderation call itself failed.

Still stuck?

If every prompt fails with this error for more than an hour while the status page shows operational, sign out and back in and try a different network. API users should confirm the error persists across regions and check the request payload for extremely long inputs.