{"uid":"cap_Ydwj_58BSs124yIBpbeMI","slug":"testnet-eth-merchant-buy-sepolia-eth-6fbf7058","name":"Testnet ETH Merchant – Buy Sepolia ETH","description":"Buy Sepolia ETH with Base or Solana USDC at $0.05 per testnet ETH","url":"https://merchant-production-c224.up.railway.app/v1/buy/sepolia","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"amount":{"type":"string","pattern":"^[1-9][0-9]*$","description":"Whole-number amount of Sepolia ETH; 1-100"},"recipient":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"EVM payout address; optional for Base payments and required for Solana payments"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"status":"payment_pending","orderId":"00000000-0000-0000-0000-000000000000","statusUrl":"/v1/orders/00000000-0000-0000-0000-000000000000"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_nHZTy5fr67THa89buEVwp","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Purchase Sepolia testnet ETH using Base mainnet USDC at $0.05 per ETH via x402 micropayment protocol","exampleAgentPrompt":"Can you buy me 10 Sepolia testnet ETH using my Base USDC and send it to my wallet at 0xAbCd1234abcd1234abcd1234abcd1234AbCd1234?","exampleUseCases":[{"title":"Fund developer testnet wallet","prompt":"I need 50 Sepolia ETH sent to 0xDEAD000000000000000000000000000000000001 for my smart contract testing — can you buy that amount using my Base USDC?"},{"title":"Top up CI/CD test pipeline wallet","prompt":"My automated test pipeline at 0x1111111111111111111111111111111111111111 is out of Sepolia ETH, please buy 20 Sepolia ETH and send them there."},{"title":"Bootstrap a new testnet project","prompt":"I just spun up a new Ethereum Sepolia project and need 5 Sepolia ETH to deploy my contracts — buy them with USDC and send to 0xBEEF000000000000000000000000000000000002."}],"resultDescription":"Returns a JSON object with a status field (e.g. 'payment_pending'), a UUID orderId, and a statusUrl path where the agent can poll for fulfillment and confirmation that Sepolia ETH was delivered to the recipient address.","failureModes":["Invalid recipient address format (must be 0x-prefixed 40-char hex) returns validation error","Amount out of range (must be whole number 1-100) causes rejection","Insufficient USDC balance or failed x402 payment results in order not created","Testnet ETH supply temporarily unavailable may delay or fail fulfillment","Network/Railway service downtime returns HTTP 5xx"],"whenToPreferThis":"Use this endpoint when an AI agent or developer needs Sepolia testnet ETH funded via a programmable, on-chain micropayment (x402 / Base USDC) rather than using a free faucet. Ideal for automated CI/CD pipelines, agent fleets, or any workflow that needs testnet ETH on demand without manual faucet interaction. Prefer this over faucets when reliability, programmatic access, and instant payment settlement matter more than zero cost.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:36:56.370Z","isFirstParty":false}