Responses API Alpha Error Handling | Basic Error Guide | OpenRouter

Alpha API

This API is in alpha stage and may have breaking changes. Use with caution in production environments.

Stateless Only

This API is stateless - each request is independent and no conversation state is persisted between requests. You must include the full conversation history in each request.

The Responses API Alpha returns structured error responses that follow a consistent format.

Error Response Format

All errors follow this structure:

1 {
2   "error": {
3     "code": "invalid_prompt",
4     "message": "Detailed error description"
5   },
6   "metadata": null
7 }

Error Codes

The API uses the following error codes:

Code	Description	Equivalent HTTP Status
`invalid_prompt`	Request validation failed	400
`rate_limit_exceeded`	Too many requests	429
`server_error`	Internal server error	500+