Gamma API Troubleshooting Guide
While we'd love to help with all things API, keep in mind our support team can't build workflows, debug your backend code (FastAPI, Express, Django, etc.), or troubleshoot platform-specific quirks.
We can help with Gamma-specific questions about our endpoints and parameters, API authentication, error troubleshooting, credits, and verifying your request matches our documentation.
For platform-specific help, contact Zapier Support, Make Support, or N8N Support.
For more information on Gamma's API, see: developers.gamma.app
Common Error Codes
400 Bad Request
Invalid parameters
Check your request for:
Missing required fields (
inputText,textMode)Invalid parameter values
Character/token limits exceeded
Review the error message for specific validation details.
401 Unauthorized
Invalid API key
Your API key is invalid or not associated with a Pro account.
Verify you're using the
X-API-KEYheader (not Authorization)Generate a new API key at gamma.app/settings/billing
Confirm your account has an active Pro, Ultra, Teams, or Business plan
403 Forbidden
No credits available
Your account has run out of API credits.
Fix this at gamma.app/settings/billing:
Enable auto-recharge (recommended)
Purchase credits ad hoc
Upgrade to a higher tier plan
404 Not Found
Invalid generation ID
The generation ID doesn't exist or belongs to another user.
Check that you're using the correct generationId from the POST response.
422 Failed
Generation couldn't complete
The generation produced empty output.
Review your request:
Ensure
inputTexthas sufficient contentCheck that parameters align with your input
Simplify complex instructions if needed
429 Too Many Requests
Rate limit exceeded
You've hit the rate limit (50 generations/hour).
Note: The API has generous capacity. Most users never encounter this limit in normal usage.
Solutions:
Contact Gamma Support for higher capacity
Implement exponential backoff
Spread requests over time
500 Internal Server Error
Unexpected server error
A temporary server issue occurred.
Wait a moment and retry
If persistent, contact support with your
x-request-id
502 Bad Gateway
Temporary gateway issue
A temporary connection issue occurred.
Wait a moment and retry your request.
Still Need Help?
General Support: How to contact Gamma support
API Community: Join the Gamma API Slack
SSO Issues: Contact your organization's IT administrator