{"uid":"cap_uhaOM07Iv1negebr8Z5s0","slug":"coin-railz-token-approval-transaction-generator-d1ba2bed","name":"Coin Railz Token Approval Transaction Generator","description":"Token approval transaction generator - required infrastructure for DeFi agents (B2B2C infrastructure)","url":"https://coinrailz.com/x402/approval-manager","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"query":{"type":"string","description":"Query parameter for the service"}}},"responseSchema":{"type":"application/json","format":"json","example":{"result":"Service executed successfully","service":"approval-manager","success":true,"timestamp":"2026-02-07T01:49:56.224Z"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.2","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.2/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_CWRxaAKG1D2kattZyMEJn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.2","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates ERC-20 token approval transactions required for DeFi agent interactions with smart contracts","exampleAgentPrompt":"I need to approve my USDC token spending on the Uniswap router contract before executing a swap — generate the token approval transaction for my wallet.","exampleUseCases":[{"title":"Automated liquidity provision setup","prompt":"I'm running a bot that provides liquidity on Curve Finance. I need to approve my DAI and USDC tokens so the pool contract can access them — generate those approval transactions right now."},{"title":"Batch token swap execution","prompt":"My agent is about to execute multiple swaps across different DEXes today. Can you generate approval transactions for USDT, WETH, and USDC tokens so everything is ready to go without delays?"},{"title":"Yield farming bot initialization","prompt":"I'm deploying an AI agent to farm yield on Aave. It needs approval to deposit my stablecoins into the lending protocol. Please generate the token approval transaction so my agent can start farming immediately."}],"resultDescription":"Returns a JSON object with success status, service name ('approval-manager'), a result message, and a UTC timestamp confirming the approval transaction was generated.","failureModes":["Invalid token contract address returns error","Invalid spender contract address returns error","Insufficient USDC balance for $0.20 service fee","Malformed wallet address causes transaction generation failure","Unsupported chain or token standard returns error"],"whenToPreferThis":"Use this endpoint when a DeFi agent needs to programmatically generate ERC-20 token approval transactions before executing swaps, liquidity provisions, or any smart contract interaction requiring token allowances. It is essential B2B2C infrastructure for automated trading bots and AI agents operating in DeFi environments where manual wallet approvals are not feasible.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:08:37.530Z","isFirstParty":false}