---
title: "schema validation | Skills We Assign For | Azendo"
description: "Schema validation at boundaries — failing fast, schema evolution, plus the Azendo roles assigned for it."
url: "https://azendo.co/skills/schema-validation/"
---

[Skills](https://azendo.co/skills/) APIs and integration 

# schema validation.

Schema validation checks that data matches an expected structure and type before it is processed, rejecting malformed input at the boundary rather than allowing it to propagate.

## Where schema validation fits on a long engagement.

Validating at the boundary is what keeps bad data out of a system. Without it, a malformed record is discovered three services later as a type error with no indication of where it entered, and tracing it back is far more expensive than rejecting it would have been.

The rejection has to be informative. A validation failure saying which field failed and why is actionable; one saying the request was invalid produces a support conversation. On a partner-facing API that difference is a meaningful proportion of integration effort on both sides.

## What an assigned team does with schema validation.

Schema evolution needs a compatibility policy. Adding an optional field is safe; making an optional field required breaks every existing producer, and doing that without a versioning story means a coordinated deployment nobody scheduled.

Stating that policy and holding it is what keeps integration boundaries stable, and it is part of the standards described in [how an assignment runs](https://azendo.co/how-it-works/).

## What we use schema validation for.

* Bad data rejected at the boundary Malformed input stopped where it entered rather than discovered downstream.
* Failures that say what was wrong Field-level messages, which materially reduce integration support effort.
* A stated compatibility policy Rules for what may change, so a schema update does not break producers.

## How schema validation capacity is assigned.

Validation is assigned inside integration capacity, with schema compatibility rules stated before external producers exist.

## Roles we assign schema validation for

* [Integration Engineer AI automation engineering](https://azendo.co/services/ai-automation-engineering/integration-engineer/)

## Service lines it sits in

* [AI automation engineering](https://azendo.co/services/ai-automation-engineering/)

Capacity is agreed as a committed monthly capacity across a discipline, not per skill.

## Related in apis and integration

* [webhooks — skill we assign for](https://azendo.co/skills/webhooks/)
* [Kafka — skill we assign for](https://azendo.co/skills/kafka/)
* [API design — skill we assign for](https://azendo.co/skills/api-design/)
* [message queues — skill we assign for](https://azendo.co/skills/message-queues/)
* [FastAPI — skill we assign for](https://azendo.co/skills/fastapi/)
* [RabbitMQ — skill we assign for](https://azendo.co/skills/rabbitmq/)
* [SQS — skill we assign for](https://azendo.co/skills/sqs/)
* [API gateways — skill we assign for](https://azendo.co/skills/api-gateways/)

## Tell us what your roadmap needs schema validation for.

A service delivery manager replies with the disciplines we would assign, the monthly capacity and what the first month looks like.

[All skills we assign for](https://azendo.co/skills/)