nft
erc-721
erc-1155
opensea
metadata
validation
tokenization
ip licensing
json schema
on-chain

NFT Metadata Validator

Validates NFT metadata JSON against the ERC-721/ERC-1155 standard and the OpenSea metadata schema. Checks required fields (name, description, image), recommended fields (external_url, animation_url, attributes array structure), and optional license fields. Returns a pass/warn/fail verdict with per-field check results. Runs entirely client-side.

Tool URL: https://ainumbers.co/tools/528-nft-metadata-validator.html

post/v1/tools/validate_nft_metadata

Request

  • Base URL: https://ainumbers.co
  • URL: https://ainumbers.co/v1/tools/validate_nft_metadata
  • Auth: none declared

Request body

metadataobject required

NFT metadata object (parsed from JSON)

Response

Successful tool execution result

validboolean
allPassboolean
requiredPassboolean
anyWarnboolean
failCountinteger
warnCountinteger
fieldCountinteger

Changes

No recorded changes to this operation across all 1 revision of this API.