---
title: "Validate Tool"
method: POST
path: "/admin/tool/custom/validate"
tags: ["public"]
---

# Validate Tool

`POST /admin/tool/custom/validate`

## Request body

- ValidateToolRequest
  - `definition` object, required

## Response `200`

Successful Response

- ValidateToolResponse
  - `methods` MethodSpec[], required
    - `name` string, required
    - `summary` string, required
    - `path` string, required
    - `method` string, required
    - `spec` object, required

## Other responses

- `422` — Validation Error

## Changes

- **2026-01-06** `2d941ea53eb3` — 2 info
  - api tag `public` added
  - the response property `methods` became required for the status `200`
- **2025-08-21** `9321c45d93b5` — 1 breaking, 1 info
  - the response property `methods` became optional for the status `200`
  - api tag `public` removed

[Change history](https://skmtc.dev/onyx-dot-app/apis/onyx-api/changes/admin/tool/custom/validate/post.md)

---

[API](https://skmtc.dev/onyx-dot-app/apis/onyx-api.md) · [All operations](https://skmtc.dev/onyx-dot-app/apis/onyx-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/onyx-dot-app/onyx-api/revisions/2d941ea53eb3/schema)