---
title: "Validate JSON data against a JSON Schema (drafts 2020-12, 2019-09, 7 and 4) and list each error with its data path and schema keyword."
method: POST
path: "/api/v1/json-schema-validator"
tags: ["Formatters & Validators"]
---

# Validate JSON data against a JSON Schema (drafts 2020-12, 2019-09, 7 and 4) and list each error with its data path and schema keyword.

`POST /api/v1/json-schema-validator`

## Request

- Base URL: `https://programmes.net`
- URL: `https://programmes.net/api/v1/json-schema-validator`
- Auth: none declared

JSON Schema Validator. Operations: `validate` — Validate JSON data against a JSON Schema.

## Request body

- JsonSchemaValidatorValidate: Validate JSON data against a JSON Schema.
  - `operation` 'validate', required
  - `input` string: The JSON data (instance) to validate.
  - `options` object, required
    - `schema` string, required: The JSON Schema, as JSON text. Self-contained: $ref may point inside it ($defs, definitions) but remote schemas are not fetched.
    - `draft` 'auto' | '2020-12' | '2019-09' | '7' | '4': Schema draft. "auto" reads $schema and falls back to 2020-12.

## Response `200`

The operation ran.

- object
  - `ok` unknown, required
  - `tool` 'json-schema-validator', required
  - `operation` 'validate', required
  - `result` unknown, required

## Other responses

- `400`: The request is not valid (https://programmes.net/api#invalid-request); The tool has no such operation (https://programmes.net/api#unknown-operation)
- `404`: No such tool (https://programmes.net/api#unknown-tool)
- `413`: The request or its input is too large (https://programmes.net/api#content-too-large)
- `415`: The body must be JSON (https://programmes.net/api#unsupported-media-type)
- `422`: An option is missing, of the wrong type or out of range (https://programmes.net/api#invalid-options); This call needs more CPU than one API call may use (https://programmes.net/api#refused); The operation could not process the input (https://programmes.net/api#tool-error)
- `429`: Too many requests (https://programmes.net/api#rate-limited)
- `500`: Internal error (https://programmes.net/api#internal-error)

---

[API](https://skmtc.dev/programmes/apis/programmes-net-api.md) · [All operations](https://skmtc.dev/programmes/apis/programmes-net-api/llms.txt) · [OpenAPI document](https://skmtc.dev/programmes/apis/programmes-net-api/revisions/aa939784a2e6?raw)