{"id":"bcceab80-f437-4638-b5e8-aee623a6741e","shortId":"mSAXpe","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 via the x402 payment protocol. The specific path `/api/v1/transactions/98/receipt` returns a receipt for transaction ID 98 in JSON format, gated behind a per-call USDC micropayment on the Base network. The x402 challenge confirms the endpoint is live and accepts exact-scheme payments of up to 20,000 base units of USDC (0.02 USD) per request.\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & ML (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payments settle in USDC on the Base L2 network.\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 usage examples available from the crawl. The specific behavior of the `/transactions/98/receipt` endpoint (what fields it returns, what inputs it expects beyond POST) is unknown beyond the x402 challenge metadata.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","transaction-receipt","json-response","per-call-billing","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment endpoint","USDC pay-per-call","Base network API","lowpaymentfee","payment receipt","crypto payment API"],"warnings":["No OpenAPI spec or schema documentation available","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content","The specific endpoint path references a hardcoded transaction ID (98); it is unclear whether this is a demo or a real resource","No request body schema or response body schema is documented anywhere","The broader platform lists many endpoints but none have documented behavior beyond a title and price"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/98/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/98/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and network, but there is zero documentation on request parameters, response schema, or what the receipt actually contains. The docs pages are empty stubs. This is effectively a stub listing with a verified payment 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'/api/v1/transactions/98/receipt':46 '/docs':174 '/pricing':176 '/readme':178 '/transactions/98/receipt':214 '0.02':10,24,92,146 '000':87 '20':86 '98':53 'Base network API' 'USDC pay-per-call' 'accept':78 'advertis':100 'ai':116 'analysi':119 'analyt':110 'api':107,151 'avail':205 'base':8,22,67,88,166 'base-network' 'behavior':211 'behind':58 'beyond':224,228 'broader':97 'call':62 'challeng':71,231 'classif':122 'commit':159 'confirm':72 'connect':184 'convers':139 'crawl':208 'crypto payment API' 'data':109,113 'detail':191 'document':169,200 'embed':123 'endpoint':6,20,30,74,142,215 'estim':133 'exact':80 'exact-schem':79 'exampl':204 'exchang':128 'expect':223 'export':114 'extrem':171 'feed':127 'field':217 'financ':124 'format':56 'gas':132 'gate':3,17,57,106 'generat':140 'geocod':137 'id':52 'infrastructur':135 'input':221 'insight':115 'json':55 'json-response' 'key':152 'l2':167 'limit':155 'list':144 'live':76 'lowpaymentfee' 'lowpaymentfee.com':32,98 'metadata':232 'metric':111 'micropay':64 'minimum':158 'ml':117 'network':68,168 'no-api-key' 'openapi':195 'page':179 'path':45 'pay':9,23 'payment':41,82,160 'payment receipt' 'per':13,27,61,94,147 'per-cal':60 'per-call-billing' 'platform':99 'post':225 'price':126 'prompt':186 'protocol':42 'provid':33 'quot':131 'rate':129,154 'receipt':5,19,36,49 'render':181 'report':112 'request':14,28,95,148 'request/response':198 'resourc':37 'return':47,219 'schema':199 'scheme':81 'sentiment':118 'settl':161 'span':108 'spars':172 'spec':196 'specif':44,210 'suit':102 'summar':121 'technic':190 'text':120 'token':130 'transact':4,18,35,51 'transaction receipt API' 'transaction-receipt' 'unit':89 'unknown':227 'usag':203 'usd':93 'usdc':12,26,63,91,163 'usdc-micropayment' 'util':136 'valid':138 'via':38 'wallet':185 'web3':125 'x402':2,16,40,70,105,230 'x402 micropayment endpoint' 'x402-gated':1,15,104 'x402-payment'","prices":[{"id":"7b048c95-4823-434a-8d57-6066c850531b","listingId":"bcceab80-f437-4638-b5e8-aee623a6741e","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/98/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":"2026-04-18T19:27:19.202Z"}],"sources":[{"listingId":"bcceab80-f437-4638-b5e8-aee623a6741e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/98/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:19.202Z","lastSeenAt":"2026-04-23T23:03:17.493Z"}],"details":{"listingId":"bcceab80-f437-4638-b5e8-aee623a6741e","quickStartSnippet":"# 1. POST to the endpoint — you'll get a 402 with payment challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/transactions/98/receipt\n\n# 2. Parse the 402 JSON, pay 20000 base-units USDC on Base to the payTo address,\n#    then re-POST with the X-PAYMENT header containing your payment proof.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/98/receipt"},{"claim":"All endpoints 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 platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction ID 98 via a single micropayment","Demonstrating x402 protocol integration for pay-per-call APIs","Programmatic access to receipt data without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need to fetch transaction receipts with crypto micropayments","Projects requiring keyless, pay-per-use API access on Base"],"notFor":["Production use requiring documented request/response schemas","Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who need fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:35.403Z"},"updatedAt":"2026-04-23T23:03:17.493Z"}}