# 422 invalid_input

**A constraint of the input schema is not met.**

The schema is closed: an unknown field is rejected rather than ignored.

- HTTP status: 422
- Problem identifier (`type` field): `https://noryo.app/problems/transactions/invalid_input`

[← Errors — Transaction Intelligence](https://developer.noryo.app/en-GB/transaction-intelligence/errors)

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Canonical page: https://developer.noryo.app/en-GB/transaction-intelligence/errors/invalid_input