{"id":"d7fe0e69-771f-4163-82a0-306f9acc4d0d","shortId":"8j3DXE","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource (transaction ID 118) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/118/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.\n\nThe platform advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /api) appear to require a wallet connection and contain no additional readable content. There is no OpenAPI schema, no detailed request/response documentation, and no examples of what the receipt payload actually contains. The endpoint is confirmed live (402 challenge returned successfully).","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee","crypto payment endpoint"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","Documentation pages (/docs, /pricing, /api, /README) all require wallet connection and provide no readable content","The specific data returned by the /transactions/118/receipt endpoint is undocumented","The broader platform lists many endpoints but none have detailed documentation visible without wallet connection"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/118/receipt","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/118/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and the docs/pricing/api pages are empty (wallet-gated). The specific purpose of this receipt endpoint is unclear beyond its URL path. Effectively a stub 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'/api/v1/transactions/118/receipt':89 '/docs':167 '/pricing':168 '0.02':10,24,75,134 '000':123 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '0x8335':128 '118':40 '20':122 '2913':129 '300':151 '402':206 '6':138 'Base network API' 'USDC micropayment API' 'accept':90 'access':164 'actual':199 'addit':179 'address':145 'advertis':118,155 'ai/ml':65 'analyt':64 'api':61,157 'appear':170 'base':8,22,84,124,131 'base-network' 'behind':41 'broader':50 'call':60 'caller':103 'challeng':117,207 'confirm':204 'connect':175 'contain':177,200 'content':181 'crypto payment endpoint' 'data':63,68 'decim':139 'detail':188 'document':165,190 'endpoint':6,20,30,88,202 'equal':133 'exampl':193 'finance/web3':67 'gate':3,17 'given':135 'handl':98 'header':110 'id':39 'includ':105 'infer':66 'instant':163 'json':95 'json-response' 'key':158 'limit':161 'live':205 'lowpaymentfee' 'lowpaymentfee.com':32 'maxamountrequir':120 'must':104 'network':85 'no-api-key' 'offer':53 'openapi':185 'page':166 'part':47 'pay':9,23,58 'pay-per-cal':57 'pay-per-call' 'pay-per-request API' 'payload':198 'payment':96,109,114,141 'paywal':44 'per':13,27,59,76 'platform':51,154 'post':91 'price':73 'proof':115 'protocol':102 'provid':33 'rate':160 'readabl':180 'receipt':5,19,36,197 'request':14,28,77,92 'request/response':189 'requir':172 'resourc':37 'return':94,208 'schema':186 'second':152 'sent':143 'servic':71 'settl':79 'span':62 'specif':87 'success':209 'timeout':149 'transact':4,18,35,38 'transaction receipt API' 'transaction-receipt' 'unit':125 'usdc':12,26,81,127,136 'usdc-settlement' 'util':70 'valid':113 'varieti':55 'via':99 'wallet':174 'x':108 'x-payment':107 'x402':2,16,43,101 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"aa3a8e34-9561-4c66-acea-581b6be5b801","listingId":"d7fe0e69-771f-4163-82a0-306f9acc4d0d","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/118/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:26.161Z"}],"sources":[{"listingId":"d7fe0e69-771f-4163-82a0-306f9acc4d0d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/118/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:26.161Z","lastSeenAt":"2026-04-25T01:32:59.886Z"}],"details":{"listingId":"d7fe0e69-771f-4163-82a0-306f9acc4d0d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/118/receipt \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/118/receipt"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/118/receipt"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 118 via a micropayment-gated API","Demonstrating x402 protocol integration for pay-per-call services","Accessing financial or transactional data without traditional API key registration"],"bestFor":["Developers experimenting with x402 protocol payments","Agents that can settle USDC on Base for per-call API access","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume batch retrieval where per-call pricing is inefficient","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.097Z"},"updatedAt":"2026-04-25T01:32:59.886Z"}}