openapi: 3.1.0
info:
  title: CoinGecko Crypto Market Data Asset Platforms Simple API
  description: The CoinGecko Crypto Market Data API provides comprehensive and reliable cryptocurrency price and market data through RESTful JSON endpoints. It offers over 70 endpoints covering real-time and historical prices, trading volumes, market capitalization, OHLCV data, exchange information, NFT metrics, derivatives data, and public treasury holdings for over 18,000 coins. The Demo API plan provides free access with 30 calls per minute to a subset of 30 publicly accessible endpoints.
  version: 3.0.1
  contact:
    name: CoinGecko Support
    url: https://support.coingecko.com
  termsOfService: https://www.coingecko.com/en/terms
servers:
- url: https://api.coingecko.com/api/v3
  description: CoinGecko Demo API Server
security:
- demoApiKeyHeader: []
- demoApiKeyQuery: []
tags:
- name: Simple
  description: Simple price and token price lookups without the overhead of full coin data responses.
paths:
  /simple/price:
    get:
      operationId: getSimplePrice
      summary: Get coin price by IDs
      description: Query the prices of one or more coins by using their unique CoinGecko coin IDs. Optionally include market cap, 24h volume, 24h change, and last updated timestamp.
      tags:
      - Simple
      parameters:
      - $ref: '#/components/parameters/coinIds'
      - $ref: '#/components/parameters/vsCurrencies'
      - name: include_market_cap
        in: query
        description: Include market cap in the response
        schema:
          type: boolean
          default: false
      - name: include_24hr_vol
        in: query
        description: Include 24-hour trading volume in the response
        schema:
          type: boolean
          default: false
      - name: include_24hr_change
        in: query
        description: Include 24-hour price change percentage in the response
        schema:
          type: boolean
          default: false
      - name: include_last_updated_at
        in: query
        description: Include last updated timestamp in the response
        schema:
          type: boolean
          default: false
      - name: precision
        in: query
        description: Decimal precision for currency price values (0-18)
        schema:
          type: string
          enum:
          - '0'
          - '1'
          - '2'
          - '3'
          - '4'
          - '5'
          - '6'
          - '7'
          - '8'
          - '9'
          - '10'
          - '11'
          - '12'
          - '13'
          - '14'
          - '15'
          - '16'
          - '17'
          - '18'
          - full
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: object
                  additionalProperties:
                    type: number
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
        '429':
          description: Rate limit exceeded
  /simple/token_price/{id}:
    get:
      operationId: getSimpleTokenPrice
      summary: Get token price by contract address
      description: Query the prices of one or more tokens by using their contract addresses on a specific asset platform. This endpoint is useful for looking up token prices when you have the contract address rather than the CoinGecko coin ID.
      tags:
      - Simple
      parameters:
      - $ref: '#/components/parameters/assetPlatformId'
      - name: contract_addresses
        in: query
        required: true
        description: Comma-separated list of token contract addresses on the specified asset platform
        schema:
          type: string
      - $ref: '#/components/parameters/vsCurrencies'
      - name: include_market_cap
        in: query
        description: Include market cap in the response
        schema:
          type: boolean
          default: false
      - name: include_24hr_vol
        in: query
        description: Include 24-hour trading volume in the response
        schema:
          type: boolean
          default: false
      - name: include_24hr_change
        in: query
        description: Include 24-hour price change percentage in the response
        schema:
          type: boolean
          default: false
      - name: include_last_updated_at
        in: query
        description: Include last updated timestamp in the response
        schema:
          type: boolean
          default: false
      - name: precision
        in: query
        description: Decimal precision for currency price values (0-18)
        schema:
          type: string
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: object
                  additionalProperties:
                    type: number
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
  /simple/supported_vs_currencies:
    get:
      operationId: getSimpleSupportedVsCurrencies
      summary: Get supported vs currencies
      description: Get the list of all supported vs currencies (fiat and crypto) that can be used in price queries.
      tags:
      - Simple
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: array
                items:
                  type: string
                  description: Currency identifier (e.g., usd, btc, eth)
  /onchain/simple/networks/{network}/token_price/{addresses}:
    get:
      operationId: getOnchainSimpleTokenPrice
      summary: Get token prices by contract addresses
      description: Get the USD prices of multiple tokens on a specific network by their contract addresses. Returns the latest price data for each requested token.
      tags:
      - Simple
      parameters:
      - $ref: '#/components/parameters/networkId'
      - name: addresses
        in: path
        required: true
        description: Comma-separated list of token contract addresses (up to 30)
        schema:
          type: string
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: object
                    properties:
                      id:
                        type: string
                      type:
                        type: string
                      attributes:
                        type: object
                        properties:
                          token_prices:
                            type: object
                            additionalProperties:
                              type: string
                              description: USD price as string
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
components:
  parameters:
    networkId:
      name: network
      in: path
      required: true
      description: The blockchain network identifier (e.g., eth, bsc, polygon_pos, solana, arbitrum, avalanche, base)
      schema:
        type: string
    coinIds:
      name: ids
      in: query
      required: true
      description: Comma-separated list of CoinGecko coin IDs (e.g., bitcoin,ethereum)
      schema:
        type: string
    vsCurrencies:
      name: vs_currencies
      in: query
      required: true
      description: Comma-separated list of target currencies (e.g., usd,eur,btc)
      schema:
        type: string
    assetPlatformId:
      name: id
      in: path
      required: true
      description: The asset platform ID (e.g., ethereum, polygon-pos, solana)
      schema:
        type: string
  securitySchemes:
    demoApiKeyHeader:
      type: apiKey
      in: header
      name: x-cg-demo-api-key
      description: CoinGecko Demo API key passed via request header. Obtain a free key from the CoinGecko developer dashboard.
    demoApiKeyQuery:
      type: apiKey
      in: query
      name: x_cg_demo_api_key
      description: CoinGecko Demo API key passed via query string parameter.
externalDocs:
  description: CoinGecko API Documentation
  url: https://docs.coingecko.com