---
title: "NFT Metadata Validator"
method: POST
path: "/v1/tools/validate_nft_metadata_art209"
---

# NFT Metadata Validator

`POST /v1/tools/validate_nft_metadata_art209`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/validate_nft_metadata_art209`
- Auth: none declared

Validates NFT metadata against ERC-721 and ERC-1155 required fields plus OpenSea metadata schema recommendations. Checks required fields (name, description, image), recommended fields (external_url, animation_url, attributes), and license declaration. Returns grouped pass/fail results. Not legal advice.

**Tool URL:** https://ainumbers.co/chaingraph/art-209-nft-metadata-validator.html

## Request body

- object
  - `metadata` unknown, required

## Response `200`

Successful tool execution result

- object
  - `all_pass` false | true, required
  - `checks` object[], required
    - `detail` string, required
    - `field` string, required
    - `group` 'license' | 'recommended' | 'required', required
    - `label` string, required
    - `pass` false | true, required
    - `warn` false | true, required
  - `disclaimer` string, required
  - `fail_count` number, required
  - `field_count` number, required
  - `required_pass` false | true, required
  - `valid` false | true, required
  - `warn_count` number, required

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)