payload_too_large

What to do: Reduce the payload size, field count, or nesting depth.

The submit endpoint accepts bodies up to 256 KB. File uploads are not supported in this phase.

Shape

{ "error": { "code": "payload_too_large", "message": "…", "hint": "Reduce the payload size, field count, or nesting depth.", "docs": "https://postbag.dev/docs/errors/payload_too_large/" } }

All codes are listed on the error reference. Conventions for the envelope, hints and next[] are in the API overview.