Coin Railz Robinhood Chain API

openapi: 3.2.0
info:
  title: Coin Railz Agent Payment Robinhood Chain API
  version: 3.0.0
  description: Production-grade x402 micropayment infrastructure for AI agents.
  contact:
    email: support@coinrailz.com
    url: https://coinrailz.com
  x-guidance: 'Use Coin Railz when an agent needs paid, structured financial or operational data without creating an account or API key. Choose the operation by its summary, description, tags, input schema, and x-price-usd. Useful starting points include first-call for a low-cost payment test; token-metadata, gas-price-oracle, wallet-risk, approval-manager, and transaction-builder for transaction preparation; compliance-check for informational risk screening; prediction-market-odds for market research; and solana-yield-finder for yield discovery.


    For a paid call, send the exact documented HTTP method, URL, content type, and JSON body without a payment header. The service returns HTTP 402 with x402Version 2 and an accepts array. Select one complete offer your wallet supports. Circle Agent Wallet and Gateway clients should prefer the eip155:5042 Arc Mainnet offer when available; Base clients can select eip155:8453. Preserve the selected offer exactly, including scheme, network, asset, amount, payTo, facilitator, resource, and any extra metadata. Sign that authorization with an x402 v2-compatible client, then retry the identical request with PAYMENT-SIGNATURE. X-PAYMENT remains available for compatible legacy clients. Do not send a standalone token transfer or construct a transaction-hash wrapper from this guidance.


    Validate required fields and constraints from each operation''s request schema before authorizing payment. Treat risk, compliance, market, yield, and investment outputs as informational analysis rather than legal, banking, or investment advice. Prices are per call and the live 402 challenge is authoritative. Responses are JSON unless the operation states otherwise.'
  x-payment-info:
    protocol: x402
    x402Version: 2
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    recipientWallet: '0xa4bbe37f9a6ae2dc36a607b91eb148c0ae163c91'
    facilitator: https://api.cdp.coinbase.com/platform/v2/x402
    supportedNetworks:
    - network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      facilitator: https://api.cdp.coinbase.com/platform/v2/x402
    - network: eip155:5042
      asset: USDC
      assetAddress: '0x3600000000000000000000000000000000000000'
      gatewayVerifier: '0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE'
      facilitator: https://gateway-api.circle.com
  x-payment-manifest: https://coinrailz.com/x402/payment-manifest.json
servers:
- url: https://coinrailz.com
  description: Current environment
- url: https://coinrailz.com
  description: Production
security:
- apiKey: []
tags:
- name: Robinhood Chain
paths:
  /x402/robinhood-token-price:
    post:
      tags:
      - Robinhood Chain
      summary: Robinhood Chain Token Price
      description: Real-time token price and pool data for any token on Robinhood Chain (eip155:4663) via Chainlink SVR feeds. Returns price, 24h change, and top liquidity pool.
      x-price-usd: 0.6
      x-featured: true
      operationId: robinhoodTokenPrice
      requestBody:
        content:
          application/json:
            schema:
              type: object
              required:
              - address
              properties:
                address:
                  type: string
                  description: Token contract address on Robinhood Chain (0x...)
      responses:
        '200':
          description: Token price, 24h change, volume, liquidity, pool count, confidence, and data source
        '402':
          description: Payment Required
  /x402/robinhood-dex-pools:
    post:
      tags:
      - Robinhood Chain
      summary: Robinhood Chain DEX Pools
      description: Top DEX liquidity pools on Robinhood Chain. Pass a token address for token-specific pools, or omit for chain-wide top pools by liquidity. Includes fee tier, 24h volume, and pool addresses.
      x-price-usd: 1.25
      x-featured: true
      operationId: robinhoodDexPools
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                token:
                  type: string
                  description: Optional token contract address to filter pools (omit for top pools chain-wide)
                minLiquidity:
                  type: number
                  description: 'Minimum pool liquidity in USD (default: 0)'
                limit:
                  type: number
                  description: 'Maximum number of pools to return (default: 20, max: 50)'
      responses:
        '200':
          description: Array of DEX pools with liquidity, volume, fee tier, and pair details
        '402':
          description: Payment Required
  /x402/robinhood-chain-stats:
    post:
      tags:
      - Robinhood Chain
      summary: Robinhood Chain Health Stats
      description: 'Chain-level health metrics for Robinhood Chain (eip155:4663): current block height, gas price, validator count, and network TPS via Chainlink on-chain reads.'
      x-price-usd: 0.75
      x-featured: false
      operationId: robinhoodChainStats
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties: {}
      responses:
        '200':
          description: 'Chain stats: latestBlock, gasPriceGwei, totalPools, totalVolume24hUSD, totalLiquidityUSD, topTokens'
        '402':
          description: Payment Required
  /x402/rh-stock-price:
    post:
      tags:
      - Robinhood Chain
      summary: Robinhood Chain Stock Price Feed
      description: Live Chainlink SVR price feeds for 35+ stock tokens (AAPL, NVDA, SPY, TSLA, META, AMZN, MSFT, GOOGL, COIN, PLTR, and more) on Robinhood Chain. 8-decimal precision. Batch up to 10 symbols per call.
      x-price-usd: 0.05
      x-featured: false
      operationId: rhStockPrice
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                symbol:
                  type: string
                  description: Single stock/ETF/crypto symbol (e.g. 'AAPL')
                symbols:
                  type: array
                  items:
                    type: string
                  description: Batch of up to 10 symbols (e.g. ['AAPL','NVDA','SPY'])
      responses:
        '200':
          description: 'prices[]: {symbol, priceUSD, updatedAt, staleSeconds, fresh, feedAddress, chainId}'
        '402':
          description: Payment Required
  /x402/rh-bridge-usdc:
    post:
      tags:
      - Robinhood Chain
      summary: Robinhood Chain Bootstrap Bridge
      description: Bridge 0.50 USDC from Base (chainId 8453) to USDG on Robinhood Chain (chainId 4663) via Across Protocol. Treasury-funded — no pre-approval required. Returns unsigned bridge calldata; USDG arrives in ~30 seconds. Ideal for bootstrapping an RH Chain agent wallet.
      x-price-usd: 0.75
      x-featured: false
      operationId: rhBridgeUsdc
      requestBody:
        content:
          application/json:
            schema:
              type: object
              required:
              - recipient
              properties:
                recipient:
                  type: string
                  description: 0x wallet address on Robinhood Chain to receive USDG
                note:
                  type: string
                  description: Optional memo for your records
      responses:
        '200':
          description: depositTx, recipient, amountBridgedUSDC, estimatedUSDGOutput, estimatedFillTimeSec, baseScan, rhScan
        '402':
          description: Payment Required
        '500':
          description: Bridge failed (e.g. treasury balance insufficient)
components:
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: X-API-KEY
      description: Prepaid credits API key (cr_live_...). Obtain via GET /api/m2m/credits/trial (free $5) or POST /api/m2m/credits/checkout/session (paid).
    bearerApiKey:
      type: http
      scheme: bearer
      description: 'Same cr_live_ key as X-API-KEY, passed as Authorization: Bearer <key>.'
    x402:
      type: apiKey
      in: header
      name: X-PAYMENT
      description: x402 protocol on-chain USDC payment. Base64url-encoded signed payment payload. See /.well-known/x402.json for facilitator details.
    mpp:
      type: http
      scheme: payment
      description: 'MPP (Machine Payments Protocol) credential. Authorization: Payment <base64-credential>. See /.well-known/mpp.json.'
externalDocs:
  description: Full x402 service catalog
  url: https://coinrailz.com/x402/catalog