Art Blocks Token Metadata API

openapi: 3.1.0
info:
  title: Art Blocks Generator Token Metadata API
  description: Returns an iframe-able live view of the generative artwork associated with a given Art Blocks token. The live view runs the artist's on-chain script in the browser using the token's deterministic hash as a seed, producing the canonical on-chain artwork output. Useful for embedding live artwork in external applications and marketplaces.
  version: 1.0.0
  contact:
    name: Art Blocks Developer Documentation
    url: https://docs.artblocks.io/developer/token-and-generator-apis/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: https://generator.artblocks.io
  description: Production (Ethereum, Arbitrum One, Base)
- url: https://generator.staging.artblocks.io
  description: Staging (Sepolia testnet)
tags:
- name: Token Metadata
  description: ERC-721 token metadata endpoints.
paths:
  /{chainId}/{contractAddress}/{tokenId}:
    get:
      operationId: getTokenMetadata
      summary: Get token metadata
      description: Returns ERC-721 token metadata for a given Art Blocks token, conforming to the OpenSea metadata standard. The response includes the live view URL (generator) and media proxy URL (static PNG) so integrators can obtain all asset links from a single call.
      tags:
      - Token Metadata
      parameters:
      - name: chainId
        in: path
        required: true
        description: Chain ID of the network. Use 1 for Ethereum, 42161 for Arbitrum One, 8453 for Base.
        schema:
          type: integer
          enum:
          - 1
          - 42161
          - 8453
          example: 1
      - name: contractAddress
        in: path
        required: true
        description: Ethereum address of the Art Blocks core contract.
        schema:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          example: '0x99a9b7c1116f9ceeb1652de04d5969cce509b069'
      - name: tokenId
        in: path
        required: true
        description: The ERC-721 token ID. For Art Blocks flagship contracts the token ID encodes the project ID (token_id = project_id * 1,000,000 + invocation).
        schema:
          type: integer
          example: 385000000
      responses:
        '200':
          description: ERC-721 token metadata conforming to the OpenSea metadata standard.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TokenMetadata'
              example:
                name: 'Chromie Squiggle #0'
                description: Simple and easily understood, the Squiggle is a rendered depiction of a Bézier curve. This project is a homage to the soul of Art Blocks.
                image: https://media-proxy.artblocks.io/1/0x059edd72cd353df5106d2b9cc5ab83a52287ac3a/0.png
                animation_url: https://generator.artblocks.io/1/0x059edd72cd353df5106d2b9cc5ab83a52287ac3a/0
                external_url: https://www.artblocks.io/token/1/0x059edd72cd353df5106d2b9cc5ab83a52287ac3a/0
                attributes:
                - trait_type: Color Palette
                  value: Pipe Dream
                - trait_type: Ends
                  value: Flat
                - trait_type: Steps
                  value: '3'
        '400':
          description: Invalid token ID or contract address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Token not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    TokenMetadata:
      type: object
      description: ERC-721 token metadata conforming to the OpenSea metadata standard.
      properties:
        name:
          type: string
          description: Name of the token/artwork.
        description:
          type: string
          description: Description of the artwork or project.
        image:
          type: string
          format: uri
          description: URL to the static PNG render from the Media Proxy API.
        animation_url:
          type: string
          format: uri
          description: URL to the live generative artwork view from the Generator API.
        external_url:
          type: string
          format: uri
          description: URL to the token detail page on artblocks.io.
        attributes:
          type: array
          description: Computed feature traits for the token.
          items:
            $ref: '#/components/schemas/Attribute'
    Error:
      type: object
      properties:
        message:
          type: string
          description: Human-readable error message.
    Attribute:
      type: object
      description: A trait attribute on the token.
      required:
      - trait_type
      - value
      properties:
        trait_type:
          type: string
          description: Name of the trait.
        value:
          oneOf:
          - type: string
          - type: number
          - type: boolean
          description: Value of the trait.
        display_type:
          type: string
          description: Optional display type hint (e.g., 'number', 'date').
externalDocs:
  description: Art Blocks Developer Documentation
  url: https://docs.artblocks.io/developer/token-and-generator-apis/