{"id":"0f9285b1-407c-463a-aa23-16c7c266b6f8","shortId":"5fmLCF","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 a transaction receipt for transaction ID 307 via a POST request. It is part of a broader platform offering multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/transactions/307/receipt` returns a JSON response and accepts payment in USDC on the Base network using the x402 exact payment scheme. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a timeout of 300 seconds.\n\nThe platform advertises a wide range of endpoints across categories including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more — all at the same $0.02 per-call price point. However, documentation 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. The exact nature of the data returned by this receipt endpoint is unclear beyond the MIME type being `application/json`.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","transaction-receipt","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 OpenAPI or schema documentation available for any endpoint on the platform","Docs, API, pricing, and README pages all render only 'Connect wallet' with no content","The specific purpose and response format of the /transactions/307/receipt endpoint is undocumented","The hardcoded transaction ID (307) in the URL suggests this may be a single-resource endpoint rather than a parameterized API","No examples of request body or response body are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/307/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/307/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 (returns 402 with a valid x402 challenge), and pricing is clear at $0.02 USDC on Base. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of this receipt endpoint is unclear. The platform lists many endpoints but provides no technical details for any of 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'/request':17,34 '0.02':16,33,78,130,172 '000':121 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':136 '20':120 '300':141 '307':49 '6':126 'Base network API' 'USDC micropayment API' 'accept':101 'across':151 'address':135 'advertis':145 'ai':67 'amount':117 'analysi':155 'analyt':66 'api':63,83,185 'application/json':234 'avail':215 'base':9,26,107,122 'base-network' 'beyond':229 'broader':59 'call':4,21,175 'categori':64,152 'classif':158 'commit':90 'connect':194 'data':65,221 'decim':127 'detail':201 'doc':184 'document':179,210 'embed':159 'enabl':38 'endpoint':7,24,39,94,150,226 'equal':129 'exact':112,217 'exampl':214 'exchang':162 'extrem':181 'feed':161 'financ':70 'geocod':164 'howev':178 'id':48 'includ':153 'infrastructur':73 'json':98 'json-response' 'key':84 'learn':69 'limit':87 'lowpaymentfee' 'lowpaymentfee.com':41 'machin':68 'max':116 'mime':231 'multipl':62 'natur':218 'network':108 'offer':61 'openapi':205 'page':189 'part':56 'pay':2,19 'pay-per-cal':1,18 'pay-per-call API' 'payment':102,113,131 'per':3,20,79,174 'per-cal':173 'per-call-pricing' 'platform':60,144 'point':177 'post':52 'price':76,160,176,186 'prompt':196 'provid':42 'rang':148 'rate':86,163 'readm':188 'receipt':6,23,45,225 'render':191 'request':53,80 'request/response':208 'requir':91,118 'respons':99 'return':96,222 'schema':209 'scheme':114 'second':142 'sent':133 'sentiment':154 'settl':12,29 'spars':182 'spec':206 'specif':93 'summar':157 'technic':200 'text':156 'timeout':139 'transact':5,22,44,47 'transaction receipt API' 'transaction-receipt' 'type':232 'unclear':228 'unit':123 'usag':213 'usdc':14,31,104,125 'usdc-settlement' 'use':109 'util':74 'valid':165 'via':10,27,50 'wallet':195 'web3':71 'wide':147 'x402':11,28,37,111 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"388ab254-ef3a-408e-a96b-08672ef23bca","listingId":"0f9285b1-407c-463a-aa23-16c7c266b6f8","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/307/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":"2026-04-18T19:25:53.776Z"}],"sources":[{"listingId":"0f9285b1-407c-463a-aa23-16c7c266b6f8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/307/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:53.776Z","lastSeenAt":"2026-04-24T11:32:47.971Z"}],"details":{"listingId":"0f9285b1-407c-463a-aa23-16c7c266b6f8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/307/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 HTTP 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/307/receipt"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/307/receipt"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 307 via programmatic pay-per-call access","Demonstrating x402 payment protocol integration on the Base network","Agent-driven micropayment workflows that need no API keys or accounts"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Micropayment use cases where $0.02/call pricing is attractive"],"notFor":["Production workloads requiring detailed API documentation and SLAs","Bulk data retrieval where per-call pricing would be cost-prohibitive","Users who need fiat-only payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.449Z"},"updatedAt":"2026-04-24T11:32:47.971Z"}}