{"id":"eed01377-4e9b-4c00-897a-a56dd92404d0","shortId":"eXVMbL","kind":"x402","title":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","tagline":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a transaction receipt (transaction ID 225) behind an x402 paywall. The provider operates a broader platform offering multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/225/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers receive a 402 challenge containing payment details (payTo address, asset contract, amount), construct an on-chain USDC payment on Base, and include the payment proof in the `X-PAYMENT` header to gain access. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are required.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the receipt payload actually contains. The endpoint is live and responding with a valid x402 challenge, but the lack of documentation makes it difficult to know what data is returned or what inputs (if any) the POST body expects.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","micropayment","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","micropayment API","USDC payment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no usable content","No OpenAPI or schema available — request body and response format are unknown","Endpoint is specific to transaction ID 225; unclear if other transaction IDs are available at similar paths","Provider platform lists many other endpoints but none were probed; their functionality is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/225/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/225/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, but documentation is essentially nonexistent — docs/pricing/API pages all show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no description of what the receipt contains or what POST body is expected. The endpoint path is specific to a single transaction ID (225), which limits general 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'0.02':11,24,67,146 '000':137 '20':136 '225':39 '402':98 '6':142 'Base network API' 'USDC payment API' 'accept':82 'access':32,130 'actual':198 'address':104 'ai':56 'amount':107,133 'analyt':55 'api':52,148,166 'asset':105 'base':8,21,76,116,138 'base-network' 'behind':40 'bodi':232 'broader':48 'caller':95 'categori':53 'chain':112 'challeng':99,210 'commit':154 'connect':175 'construct':108 'contain':100,199 'content':181 'contract':106 'data':54,222 'decim':143 'descript':192 'detail':102 'difficult':218 'doc':165 'document':157,215 'endpoint':28,80,201 'equal':145 'exampl':189 'expect':233 'extrem':162 'financ':59 'gain':129 'handl':90 'header':127 'id':38 'includ':118 'infrastructur':62 'input':227 'json':87 'key':149 'know':220 'lack':213 'learn':58 'limit':151 'live':203 'lowpaymentfee' 'lowpaymentfee.com':30 'machin':57 'make':216 'max':132 'micropay':6,19 'micropayment' 'micropayment API' 'multipl':51 'network':9,22,77 'no-api-key' 'offer':50 'on-chain':110 'openapi':185 'oper':46 'page':170 'pay-per-call API' 'pay-per-request' 'payload':197 'payment':88,101,114,120,126 'payto':103 'paywal':43 'per':12,25,68 'platform':49 'post':83,231 'price':65,167 'prompt':177 'proof':121 'protocol':94 'provid':31,45 'rate':150 'readm':169 'receipt':2,15,36,196 'receiv':96 'render':172 'request':13,26,69,84 'request/response':188 'requir':134,156 'respond':205 'retriev':3,16 'return':86,224 'schema':186 'settl':71 'site':160 'spars':163 'specif':79 'substant':180 'transact':1,14,35,37 'transaction receipt API' 'transaction-receipt' 'unit':139 'upfront':153 'usdc':73,113,141 'usdc-settlement' 'util':63 'valid':208 'via':4,17,91 'wallet':176 'web3':60 'x':125 'x-payment':124 'x402':5,18,42,93,209 'x402 API' 'x402-payment'","prices":[{"id":"6bf1557c-709f-4c3e-8bd5-d0c9f7a1e870","listingId":"eed01377-4e9b-4c00-897a-a56dd92404d0","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/225/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":"2026-04-18T18:59:23.438Z"}],"sources":[{"listingId":"eed01377-4e9b-4c00-897a-a56dd92404d0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/225/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:23.438Z","lastSeenAt":"2026-04-24T17:03:04.806Z"}],"details":{"listingId":"eed01377-4e9b-4c00-897a-a56dd92404d0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/225/receipt\n# Returns 402 with x402 challenge. Include X-PAYMENT header with USDC payment proof on Base to access.","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/225/receipt"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/225/receipt"}],"useCases":["Retrieving a receipt for transaction 225 via programmatic micropayment","Demonstrating x402 protocol integration for pay-per-request APIs","Agents autonomously purchasing transaction data without API keys"],"bestFor":["Developers experimenting with x402 protocol payments","Agents that need to fetch transaction receipts without pre-registration","Use cases requiring low-cost, keyless API access on Base"],"notFor":["Bulk retrieval of many different transaction receipts (only transaction 225 is exposed at this endpoint)","Users who need detailed API documentation or OpenAPI specs before integrating","Non-crypto workflows that cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.385Z"},"updatedAt":"2026-04-24T17:03:04.806Z"}}