{"id":"763a18ed-7b8f-44e2-abe5-9e18c3b0cff2","shortId":"gHCdth","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides access to a transaction receipt resource (transaction ID 247) via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact payment scheme. The per-request cost is $0.02 (20,000 base units of USDC with 6 decimals).\n\nThe provider's landing page advertises a broader suite of APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, this specific listing covers only the `/api/v1/transactions/247/receipt` endpoint.\n\nDocumentation is extremely sparse: the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live — it returns a proper x402 402 challenge — but without documentation it is unclear what request body (if any) is expected or what the receipt response structure looks like.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or schema documentation available — request body and response format are unknown","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content","This endpoint is for a specific transaction ID (247); it is unclear whether other transaction IDs are available or how they are discovered","The broader API suite advertised on the landing page is not verified — only this single endpoint was probed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/247/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/247/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no example payloads. The specific purpose of this receipt endpoint is unclear beyond its URL path. Effectively a stub 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'/request':17,34 '0.02':16,33,80,139 '000':82 '0x8335':66 '20':81 '247':51 '2913':67 '402':209 '6':88 'Base network API' 'USDC micropayment API' 'access':43 'advertis':95 'ai':109 'analysi':113 'analyt':103 'api':100,144,168 'avail':198 'base':9,26,61,83 'base-network' 'bodi':219 'broader':97 'call':4,21 'challeng':210 'classif':116 'commit':152 'confirm':202 'connect':177 'contract':65 'convers':133 'cost':78 'cover':157 'crypto payment API' 'data':102,106 'decim':89 'detail':184 'doc':167 'document':162,193,213 'embed':117 'enabl':38 'endpoint':7,24,39,161,200 'estim':127 'exact':71 'exampl':196 'exchang':122 'expect':223 'export':107 'extrem':164 'feed':121 'financ':118 'gas':126 'generat':134 'geocod':131 'howev':153 'id':50 'infrastructur':129 'insight':108 'key':145 'land':93 'learn':111 'like':231 'limit':148 'list':156 'live':203 'look':230 'lowpaymentfee' 'lowpaymentfee.com':41 'machin':110 'metric':104 'minimum':151 'network':62 'no-api-key' 'openapi':188 'page':94,172 'pay':2,19 'pay-per-cal':1,18 'pay-per-call' 'pay-per-request API' 'payload':197 'payment':56,72 'per':3,20,76,140 'per-request':75 'post':54 'price':120,136,169 'prompt':179 'proper':207 'provid':42,91 'quot':125 'rate':123,147 'readm':171 'receipt':6,23,47,227 'render':174 'report':105 'request':55,77,141,218 'request/response':191 'resourc':48 'respons':228 'return':205 'schema':192 'scheme':73 'sentiment':112 'settl':12,29,58 'span':101 'spars':165 'spec':189 'specif':155 'structur':229 'suit':98 'summar':115 'technic':183 'text':114 'token':124 'transact':5,22,46,49 'transaction receipt API' 'transaction-receipt' 'unclear':216 'uniform':137 'unit':84 'usdc':14,31,64,86 'usdc-settlement' 'use':63 'util':130 'valid':132 'via':10,27,52 'wallet':178 'web3':119 'without':212 'x402':11,28,37,70,208 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"c509a557-292a-40cc-bb6d-55cec6499725","listingId":"763a18ed-7b8f-44e2-abe5-9e18c3b0cff2","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/247/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":"2026-04-18T18:59:28.216Z"}],"sources":[{"listingId":"763a18ed-7b8f-44e2-abe5-9e18c3b0cff2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/247/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:28.216Z","lastSeenAt":"2026-04-24T16:03:18.220Z"}],"details":{"listingId":"763a18ed-7b8f-44e2-abe5-9e18c3b0cff2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/247/receipt \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/247/receipt"},{"claim":"All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The provider advertises APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 247 via a single paid API call","Demonstrating x402 payment protocol integration with USDC on Base","Agent-driven pay-per-call access to financial transaction data without API key management"],"bestFor":["Developers experimenting with x402 protocol payments","AI agents needing keyless, pay-per-call API access","Applications requiring on-chain USDC micropayment settlement on Base"],"notFor":["Production workloads requiring documented request/response schemas","Bulk or high-volume transaction receipt retrieval (no batch endpoint documented)","Users who need fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.164Z"},"updatedAt":"2026-04-24T16:03:18.220Z"}}