{"id":"a4c630cd-ea0b-43de-b104-883259142aa4","shortId":"e94J7j","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","tagline":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource behind an x402 paywall. The specific path `/api/v1/transactions/158/receipt` returns a receipt for transaction 158 in JSON format, payable via USDC on the Base network. The x402 challenge confirms the endpoint is live and accepts exact-scheme payments.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-request 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 endpoints are listed at $0.02 per request, settled in USDC on Base, with no API keys, no rate limits, and no minimum commitments required.\n\nHowever, the specific endpoint being listed here — the transaction receipt — has a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02. Documentation beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so there is no schema documentation, no example request/response payloads, and no detailed API reference available. The actual content returned by the receipt endpoint is unknown beyond its declared MIME type of application/json.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No API documentation available — all doc pages return only 'Connect wallet'","No request or response schema provided for this endpoint","The endpoint is for a specific transaction ID (158); unclear if other transaction IDs are available or how they are discovered","The broader platform lists many API categories but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/158/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/158/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 (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation beyond the landing page — no OpenAPI spec, no request/response schemas, no examples. The specific resource (transaction 158 receipt) is narrow and unexplained. All doc/pricing/API sub-pages return only 'Connect wallet' with no 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'0.02':128,172 '000':163 '158':51 '20':162 '6':168 'Base network API' 'USDC micropayment API' 'accept':71 'actual':206 'advertis':80 'ai':97 'analysi':101 'analyt':91 'api':88,138,202 'application/json':221 'avail':204 'base':8,22,60,135,164 'base-network' 'behind':38 'beyond':174,215 'broader':77 'call':12,26 'challeng':64 'classif':104 'commit':146 'confirm':65 'connect':187 'content':207 'convers':121 'data':90,94 'decim':169 'declar':217 'detail':201 'document':173,194 'embed':105 'empti':180 'endpoint':6,20,30,67,124,151,212 'equal':171 'essenti':179 'estim':115 'exact':73 'exact-schem':72 'exampl':196 'exchang':110 'export':95 'feed':109 'financ':106 'format':54 'gas':114 'gate':3,17 'generat':122 'geocod':119 'howev':148 'infrastructur':117 'insight':96 'json':53 'json-response' 'key':139 'land':176 'learn':99 'limit':142 'list':126,153 'live':69 'lowpaymentfee' 'lowpaymentfee.com':32,78 'machin':98 'maxamountrequir':160 'metric':92 'mime':218 'minimum':145 'network':61 'no-api-key' 'page':177,184 'paid':9,23 'path':44 'pay':85 'pay-per-call API' 'pay-per-request':84 'payabl':55 'payload':198 'payment':75 'paywal':41 'per':11,25,86,129 'per-cal':10,24 'platform':79 'price':108 'provid':33 'quot':113 'rate':111,141 'receipt':5,19,36,48,157,211 'refer':203 'report':93 'request':87,130 'request/response':197 'requir':147 'resourc':37 'return':46,208 'schema':193 'scheme':74 'sentiment':100 'settl':131 'show':186 'span':89 'specif':43,150 'sub':183 'sub-pag':182 'suit':82 'summar':103 'text':102 'token':112 'transact':4,18,35,50,156 'transaction receipt API' 'transaction-receipt' 'type':219 'unit':165 'unknown':214 'usdc':14,28,57,133,167 'usdc-settlement' 'util':118 'valid':120 'via':56 'wallet':188 'web3':107 'x402':2,16,40,63 'x402 payment endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"5bc03510-d4f0-4576-bf16-cf9ede8beeea","listingId":"a4c630cd-ea0b-43de-b104-883259142aa4","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/158/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":"2026-04-18T18:58:39.402Z"}],"sources":[{"listingId":"a4c630cd-ea0b-43de-b104-883259142aa4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/158/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:39.402Z","lastSeenAt":"2026-04-24T22:32:56.229Z"}],"details":{"listingId":"a4c630cd-ea0b-43de-b104-883259142aa4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/158/receipt\n# Returns 402 with x402 challenge; attach X-PAYMENT header with signed USDC payment on Base to complete.","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","source_url":"https://lowpaymentfee.com/api/v1/transactions/158/receipt"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/158/receipt"}],"useCases":["Retrieving a transaction receipt for transaction 158 via programmatic payment","Demonstrating x402 protocol payment flows on Base","Agent-driven micropayment API consumption without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need to fetch transaction receipts without pre-registration","Use cases requiring keyless, pay-per-call API access on Base"],"notFor":["Production workloads requiring documented schemas and SLAs","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":"2026-02-17T23:13:43.456Z"},"updatedAt":"2026-04-24T22:32:56.229Z"}}