> ## Documentation Index
> Fetch the complete documentation index at: https://developer.affinity.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Error Codes

Here is a list of the error codes the API will return if something goes wrong (see endpoint
documentation for endpoint-specific errors):

| Error Code | Meaning |
| - | - |
| 400 | Bad Request — See endpoint documentation for more information. |
| 401 | Unauthorized — Your API key is invalid. |
| 403 | Forbidden — Insufficient rights to a resource. |
| 404 | Not Found — Requested resource does not exist. See endpoint documentation for more information. |
| 405 | Method Not Allowed — The method being used is not supported for this resource. |
| 422 | Unprocessable Entity — Malformed parameters supplied. This can also happen in cases the parameters supplied logically cannot complete the request. In this case, an appropriate error message is delivered. |
| 429 | Too Many Requests — You have exceeded the rate limit. |
| 500 | Internal Server Error — We had a problem with our server. Try again later. |
| 503 | Service Unavailable — This shouldn't generally happen. Contact us if you encounter this error. |


## Related topics

- [Delete a Reminder](https://developer.affinity.co/api-reference/2026-07-15/reminders/delete-a-reminder.md)
- [Delete a Person](https://developer.affinity.co/api-reference/2026-07-15/persons/delete-a-person.md)
- [Delete an Opportunity](https://developer.affinity.co/api-reference/2026-09-17/opportunities/delete-an-opportunity.md)


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