{"id":"ad3d3f9f-f74f-4a59-a28f-7c55bc02c484","shortId":"T9Yq84","kind":"x402","title":"Transaction earnings data via x402 micropayment on Base network, $0.02/request in USDC.","tagline":"Transaction earnings data via x402 micropayment on Base network, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides finance-related transaction earnings data behind an x402 paywall. It is part of a broader platform offering Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure APIs, all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/finance/TXN/earnings` sits under the Finance & Web3 category. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 per call. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation beyond the landing page 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 schema, no request/response examples, and no description of what fields the earnings endpoint accepts or returns. The endpoint name suggests it returns earnings or revenue data for a given transaction identifier (\"TXN\" likely being a path parameter placeholder), but this is speculative. The platform advertises instant access with no API keys and no rate limits, relying entirely on per-request x402 micropayments for access control.","tags":[],"capabilities":["x402-paywall","usdc-payment","base-network","finance-data","transaction-earnings","per-request-micropayment","no-api-key","json-response"],"categories":["finance","crypto"],"synonyms":["transaction earnings API","finance earnings endpoint","TXN earnings","x402 finance API","micropayment finance data","USDC pay-per-call API","lowpaymentfee earnings"],"warnings":["No OpenAPI or request/response schema available — input and output formats are unknown","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content","The 'TXN' path segment may be a placeholder for a transaction identifier, but this is unconfirmed","Endpoint functionality is entirely inferred from the URL path; no authoritative description exists"],"endpointUrl":"https://lowpaymentfee.com/api/v1/finance/TXN/earnings","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/finance/TXN/earnings","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 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request parameters or response format, and no examples. The endpoint path suggests transaction earnings data but the actual functionality is unverified. Docs pages are empty beyond a wallet-connect 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'/request':11,24 '0.02':10,23,63,114 '000':106 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':97 '20':105 '6':111 'TXN earnings' 'USDC pay-per-call API' 'accept':119,170 'access':203,221 'advertis':101,201 'ai':52 'analyt':51 'api':59,68,136,206 'application/json':124 'base':8,21,92,107 'base-network' 'behind':38 'beyond':127 'broader':47 'call':116 'categori':86 'challeng':100 'commit':75 'connect':145 'contract':96 'control':222 'data':3,16,37,50,182 'decim':112 'descript':163 'detail':152 'doc':135 'document':126 'earn':2,15,36,168,179 'endpoint':28,79,118,169,174 'entir':213 'equal':113 'exampl':160 'extrem':132 'field':166 'financ':33,55,84 'finance earnings endpoint' 'finance-data' 'finance-rel':32 'given':185 'identifi':187 'infrastructur':58 'instant':202 'json-response' 'key':69,207 'land':129 'learn':54 'like':189 'limit':72,211 'lowpaymentfee earnings' 'lowpaymentfee.com':30 'machin':53 'maxamountrequir':103 'micropay':6,19,219 'micropayment finance data' 'name':175 'network':9,22,93 'no-api-key' 'offer':49 'openapi':156 'page':130,140 'paramet':193 'part':44 'path':192 'payment':87 'paywal':41 'per':64,115,216 'per-request':215 'per-request-micropayment' 'placehold':194 'platform':48,200 'post':120 'price':61,137 'prompt':147 'provid':31 'rate':71,210 'readm':139 'relat':34 'reli':212 'render':142 'request':65,121,217 'request/response':159 'requir':76 'respons':125 'return':123,172,178 'revenu':181 'schema':157 'settl':89 'sit':81 'spars':133 'specif':78 'specul':198 'suggest':176 'technic':151 'transact':1,14,35,186 'transaction earnings API' 'transaction-earnings' 'txn':188 'unit':108 'usdc':13,26,95 'usdc-payment' 'use':94 'via':4,17 'wallet':146 'web3':56,85 'x402':5,18,40,99,218 'x402 finance API' 'x402-paywall'","prices":[{"id":"85fecb60-5adb-40ed-b158-87958931220b","listingId":"ad3d3f9f-f74f-4a59-a28f-7c55bc02c484","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/finance/TXN/earnings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:55.183Z"}],"sources":[{"listingId":"ad3d3f9f-f74f-4a59-a28f-7c55bc02c484","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/finance/TXN/earnings","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:55.183Z","lastSeenAt":"2026-04-24T12:02:46.863Z"}],"details":{"listingId":"ad3d3f9f-f74f-4a59-a28f-7c55bc02c484","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/finance/TXN/earnings \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{}'","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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/finance/TXN/earnings"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/finance/TXN/earnings"},{"claim":"Platform pricing is $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 offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving earnings or revenue data associated with a specific transaction","Programmatic access to financial transaction metrics without API key management","Agent-driven finance data retrieval with automatic micropayment settlement"],"bestFor":["Developers wanting keyless, pay-per-call access to transaction earnings data","AI agents that can settle x402 payments on Base for financial data","Projects needing low-friction access to finance endpoints without subscriptions"],"notFor":["Users needing well-documented request/response schemas before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:52.279Z"},"updatedAt":"2026-04-24T12:02:46.863Z"}}