openapi: 3.1.0
info:
  title: Ankr Advanced EVM NFT API
  description: 'The Ankr Advanced API (AAPI) provides a specifically-tailored collection of JSON-RPC

    methods that optimize, index, cache, and store blockchain data across multiple

    EVM-compatible blockchains. The Advanced API exposes three logical groups:

    NFT, Token, and Query.

    '
  version: 1.0.0
  contact:
    name: Ankr
    url: https://www.ankr.com
    email: support@ankr.com
  license:
    name: Ankr Terms of Service
    url: https://www.ankr.com/terms/
servers:
- url: https://rpc.ankr.com/multichain
  description: Public multichain endpoint
- url: https://rpc.ankr.com/multichain/{API_KEY}
  description: Premium multichain endpoint
  variables:
    API_KEY:
      default: API_KEY
      description: Premium Plan project API key
security:
- {}
- ApiKeyAuth: []
tags:
- name: NFT
  description: NFT methods — ownership, metadata, holders, and transfer history.
paths:
  /:
    post:
      summary: Ankr Get NFTs By Owner
      description: Returns the full list of NFTs owned by a wallet address across supported chains.
      operationId: ankrGetNFTsByOwner
      tags:
      - NFT
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AnkrGetNFTsByOwnerRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AnkrGetNFTsByOwnerResponse'
        4XX:
          $ref: '#/components/responses/ErrorResponse'
  /nft/metadata:
    post:
      summary: Ankr Get NFT Metadata
      description: Returns metadata for a specific NFT (token contract + token ID).
      operationId: ankrGetNFTMetadata
      tags:
      - NFT
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AnkrGetNFTMetadataRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
        4XX:
          $ref: '#/components/responses/ErrorResponse'
  /nft/holders:
    post:
      summary: Ankr Get NFT Holders
      description: Returns the holders of a specific NFT contract.
      operationId: ankrGetNFTHolders
      tags:
      - NFT
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AnkrGetNFTHoldersRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
        4XX:
          $ref: '#/components/responses/ErrorResponse'
  /nft/transfers:
    post:
      summary: Ankr Get NFT Transfers
      description: Returns the transfer history of a specific NFT contract or wallet.
      operationId: ankrGetNftTransfers
      tags:
      - NFT
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AnkrGetNftTransfersRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
        4XX:
          $ref: '#/components/responses/ErrorResponse'
components:
  schemas:
    AnkrBlockchain:
      type: string
      enum:
      - arbitrum
      - avalanche
      - base
      - bsc
      - eth
      - fantom
      - flare
      - gnosis
      - linea
      - optimism
      - polygon
      - scroll
      - stellar
      - story
      - syscoin
      - taiko
      - telos
      - xai
      - xlayer
    JsonRpcRequest:
      type: object
      required:
      - jsonrpc
      - method
      - id
      properties:
        jsonrpc:
          type: string
          default: '2.0'
        id:
          type: integer
          example: 1
        method:
          type: string
        params:
          type: object
    AnkrGetNftTransfersRequest:
      allOf:
      - $ref: '#/components/schemas/JsonRpcRequest'
      - type: object
        properties:
          method:
            type: string
            default: ankr_getNftTransfers
          params:
            type: object
            properties:
              blockchain:
                oneOf:
                - $ref: '#/components/schemas/AnkrBlockchain'
                - type: array
                  items:
                    $ref: '#/components/schemas/AnkrBlockchain'
              fromBlock:
                type: integer
              toBlock:
                type: integer
              walletAddress:
                type: string
              contractAddress:
                type: string
              pageSize:
                type: integer
              pageToken:
                type: string
    AnkrGetNFTsByOwnerResponse:
      type: object
      properties:
        jsonrpc:
          type: string
        id:
          type: integer
        result:
          type: object
          properties:
            owner:
              type: string
            assets:
              type: array
              items:
                type: object
                properties:
                  blockchain:
                    type: string
                  name:
                    type: string
                  tokenId:
                    type: string
                  tokenUrl:
                    type: string
                  imageUrl:
                    type: string
                  collectionName:
                    type: string
                  symbol:
                    type: string
                  contractType:
                    type: string
                  contractAddress:
                    type: string
                  traits:
                    type: array
                    items:
                      type: object
            nextPageToken:
              type: string
    AnkrGetNFTMetadataRequest:
      allOf:
      - $ref: '#/components/schemas/JsonRpcRequest'
      - type: object
        properties:
          method:
            type: string
            default: ankr_getNFTMetadata
          params:
            type: object
            properties:
              blockchain:
                $ref: '#/components/schemas/AnkrBlockchain'
              contractAddress:
                type: string
              tokenId:
                type: string
    AnkrGetNFTHoldersRequest:
      allOf:
      - $ref: '#/components/schemas/JsonRpcRequest'
      - type: object
        properties:
          method:
            type: string
            default: ankr_getNFTHolders
          params:
            type: object
            properties:
              blockchain:
                $ref: '#/components/schemas/AnkrBlockchain'
              contractAddress:
                type: string
              pageSize:
                type: integer
              pageToken:
                type: string
    JsonRpcResponse:
      type: object
      properties:
        jsonrpc:
          type: string
        id:
          type: integer
        result:
          type: object
          additionalProperties: true
    Error:
      type: object
      properties:
        jsonrpc:
          type: string
        id:
          type: integer
        error:
          type: object
          properties:
            code:
              type: integer
            message:
              type: string
            data:
              type: object
    AnkrGetNFTsByOwnerRequest:
      allOf:
      - $ref: '#/components/schemas/JsonRpcRequest'
      - type: object
        properties:
          method:
            type: string
            default: ankr_getNFTsByOwner
          params:
            type: object
            properties:
              walletAddress:
                type: string
              blockchain:
                oneOf:
                - $ref: '#/components/schemas/AnkrBlockchain'
                - type: array
                  items:
                    $ref: '#/components/schemas/AnkrBlockchain'
              pageSize:
                type: integer
              pageToken:
                type: string
  responses:
    ErrorResponse:
      description: Error response (JSON-RPC error envelope).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: query
      name: API_KEY
      description: Premium Plan API key passed as the trailing path segment.