# X_OUTBOUND_BODY_INVALID

## Means

an outbound HTTP response did not match its schema

## Typical cause

json(schema) on an outbound() answer refused the body: the vendor changed its shape, or the schema is wrong. meta.issues names the rejected paths

## Fix

edit the schema passed to `answer.json(schema)` for `meta.vendor`, or ask the vendor whether the response changed

[Core and runtime](/error-codes#core-and-runtime)