{"uid":"cap_ex9wS5SFqqxyyShaZqatA","slug":"agent-bounty-radar-base-wallet-preflight-aad6e45b","name":"Agent Bounty Radar – Base Wallet Preflight","description":"Two fixed-price x402 v2 APIs on Base. Unpaid requests return HTTP 402 with PAYMENT-REQUIRED; paid retries return JSON and PAYMENT-RESPONSE.","url":"https://agent-bounty-radar-29837.alissonayres-trb.chatgpt.site/x402/base-wallet-preflight","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Public 42-character Base/EVM wallet address."}}},"responseSchema":{"type":"json","example":{"network":{"name":"Base","chain_id":8453},"balances":{"eth":"0","usdc":"0"},"address_type":"externally_owned_account","payment_readiness":{"has_outgoing_history":false,"can_cover_usdc_payment":false,"has_eth_for_direct_gas":false}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rh96nZ_O88i82H5alyAXx","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks a Base/EVM wallet address for ETH and USDC balances and determines whether it is ready to make x402 micropayments on Base.","exampleAgentPrompt":"Before I start making x402 API calls, can you preflight check my Base wallet 0xAbC1234567890abcdef1234567890AbCdEf12345 to see if it has enough USDC and ETH to actually pay for requests?","exampleUseCases":[{"title":"Agent wallet funding verification","prompt":"My AI agent uses wallet 0xAbC1234567890abcdef1234567890AbCdEf12345 on Base — can you check if it has enough USDC balance and ETH for gas before it tries to call any paid x402 APIs?"},{"title":"Onboarding wallet readiness audit","prompt":"I just set up a new Base wallet at 0xDeF9876543210fedcba9876543210FeDcBa98765 for my bot — run a preflight on it and tell me whether it's ready to make micropayments or if I need to top it up first."},{"title":"Debug failed x402 payment attempt","prompt":"My agent at 0x1111AAAbbbCCC2222ddd3333EEEfff4444AAABBB kept getting 402 errors on Base — can you check its balances and payment readiness so I know whether the problem is low USDC, no gas, or no transaction history?"}],"resultDescription":"Returns a JSON object with the Base network name and chain ID (8453), the wallet's current ETH and USDC balances as strings, the address type (e.g. externally_owned_account or contract), and a payment_readiness object indicating whether the wallet has outgoing transaction history, sufficient USDC to cover a payment, and enough ETH for direct gas coverage.","failureModes":["Invalid wallet address format (not a valid 0x 42-char hex) — API likely returns a 4xx validation error","Unpaid request returns HTTP 402 with PAYMENT-REQUIRED header; the agent must retry with a valid x402 payment","Wallet address is valid but has never been used — balances return as 0 and all readiness flags are false","Base network RPC timeout or unavailability may cause delayed or failed responses","Address is a contract rather than an EOA, which may limit payment-readiness interpretation"],"whenToPreferThis":"Use this endpoint when you need to pre-validate whether a specific Base/EVM wallet address is funded and capable of executing x402 micropayments before attempting paid API calls — especially to avoid wasted payment attempts or to diagnose why an agent wallet is failing to pay. Prefer this over on-chain RPC calls when you want a structured, opinionated readiness report rather than raw balance data, and when you are operating in the x402/Base ecosystem specifically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:37:55.613Z","isFirstParty":false}