---
title: "Catalog and connections"
description: "What a document may reference, and how to validate before you put."
url: https://docs.spinrun.ai/build/catalog-and-connections
markdown_url: https://docs.spinrun.ai/build/catalog-and-connections.md
---

# Catalog and connections

`GET /api/build/catalog` lists the models the workspace's plan allows, the connected apps with their tool counts, the trigger types and the limits. `GET /api/build/connections` lists the connection refs a document may name.

Validate before you put: `POST …/validate` runs the same compiler as a put and returns the list of changes it would apply, without applying any.

## Related [#related]

* [Agent document](https://docs.spinrun.ai/build/agent-document.md)
* [CLI](https://docs.spinrun.ai/cli.md)