{"uid":"cap_Pd-KnDjaD-qHr9qiRX-cp","slug":"build-token-purchase-5-usdc-x420-dev-1b4bd15b","name":"BUILD Token Purchase - $5 USDC (x420.dev)","description":"Buy 5 USDC worth of BUILD tokens 0xa8b9cc8f89C1dAb497fEA439848c020F64DB1b07","url":"https://build.x420.dev/api/puff-5","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"message":"string","tokensReceived":"string","usdcAmountPaid":"string","sendTransactionHash":"string | null","swapTransactionHash":"string | null"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"5","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8RwqzfgJCkqNIslGg1WJo","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Purchases $5 USDC worth of BUILD tokens (0xa8b9cc8f89C1dAb497fEA439848c020F64DB1b07) on-chain and returns transaction details","exampleAgentPrompt":"Buy me $5 worth of BUILD tokens (contract 0xa8b9cc8f89C1dAb497fEA439848c020F64DB1b07) using USDC on x420.dev and show me the transaction hashes.","exampleUseCases":null,"resultDescription":"Returns a JSON object with a confirmation message, the amount of BUILD tokens received, the USDC amount paid, and optionally the send and swap transaction hashes on-chain.","failureModes":["Insufficient USDC balance to cover the $5 payment — payment rejected","Token liquidity too low to complete the swap — swap fails","Network congestion causes transaction timeout — null transaction hashes returned","Invalid or expired payment authorization — 402 Payment Required error","Smart contract error during swap — swapTransactionHash is null with error message"],"whenToPreferThis":"Use this endpoint when you want to purchase exactly $5 USDC worth of BUILD tokens in a single on-chain transaction via x420.dev. Prefer the sibling $1 endpoint for smaller purchases. Choose this when you want a larger single-call token acquisition without manually constructing a swap transaction.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:37:54.123Z","isFirstParty":false}