Error Codes

When a call fails, the error response looks like this:

{
  "code": 100004,
  "message": "Missing parameter",
  "requestID": "request-id"
}

Common HTTP status codes:

HTTP status	Description
400	Missing parameter, malformed format, or value out of range
401	Invalid API Key
404	Template or instance not found
409	The current resource state does not allow this operation
415	File type not supported, or the request body is not multipart/form-data
500	Internal service error
501	Not supported in the current version

File errors:

Code	HTTP status	Description
`100005`	400	`source` only supports `sandbox_template`
`11900001`	500	File upload failed
`11900006`	404	File not found
`11900007`	403	File is not downloadable
`11900008`	413	File exceeds the size limit
`11900014`	415	File type not allowed
`11900019`	415	Unsupported video format
`11900023`	404	File does not exist or is being validated and is temporarily unavailable
`11900024`	400	File is not a sandbox template source
`RequestEntityTooLarge`	413	Multipart request body exceeds 50 MB

For E2B-compatible endpoints, the error structure stays close to the native E2B definitions; see the official E2B documentation for details.