{"id":"eac016ff-540c-421c-be8b-8f7b01416b8d","shortId":"LAKwqq","kind":"x402","title":"Crypto coin earnings data via x402 micropayment on Base network for $0.02/request.","tagline":"Crypto coin earnings data via x402 micropayment on Base network for $0.02/request.","description":"This endpoint at lowpaymentfee.com provides finance-related earnings data for cryptocurrency coins. It is part of a broader platform offering data & analytics, AI/ML, finance/Web3, and infrastructure APIs, all accessible via the x402 payment protocol on the Base network using USDC.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact scheme — no API keys, accounts, or rate limits are required. The cost is $0.02 per request (20,000 base units of USDC on Base, which has 6 decimals). The payment is settled to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.\n\nThe specific data returned by the `/finance/COIN/earnings` endpoint is not documented in the crawled material. Based on the URL pattern, it likely returns earnings-related financial metrics for a specified coin (where COIN is a path parameter). However, no request body schema, response schema, or example payloads are available from the provider's documentation pages, which appear to require wallet connection to access.","tags":[],"capabilities":["x402-payment","usdc-base-network","finance-data","coin-earnings","micropayment","no-api-key","json-response"],"categories":["finance","crypto"],"synonyms":["cryptocurrency earnings","coin earnings API","crypto finance data","token earnings","x402 finance endpoint","pay-per-call crypto data"],"warnings":["No request or response schema documented — endpoint behavior must be inferred from URL pattern alone","Documentation pages require wallet connection and provide no public content","The path parameter 'COIN' has no documented list of valid values","No examples of successful responses available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/finance/COIN/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/COIN/earnings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear, but there is no documentation of the request body schema, response format, or what 'COIN' values are accepted. The docs pages all just show 'Connect wallet' with no actual 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'/request':13,26 '0.02':12,25,103 '000':107 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':124 '20':106 '300':130 '6':116 'accept':70 'access':56,195 'account':94 'address':123 'ai/ml':50 'analyt':49 'api':54,92 'appear':189 'avail':181 'base':9,22,64,108,113,147 'bodi':173 'broader':45 'coin':2,15,39,163,165 'coin earnings API' 'coin-earnings' 'connect':193 'cost':101 'crawl':145 'crypto':1,14 'crypto finance data' 'cryptocurr':38 'cryptocurrency earnings' 'data':4,17,36,48,134 'decim':117 'document':142,186 'earn':3,16,35,156 'earnings-rel':155 'endpoint':28,69,139 'exact':89 'exampl':178 'financ':33 'finance-data' 'finance-rel':32 'finance/web3':51 'financi':158 'handl':78 'header':85 'howev':170 'infrastructur':53 'inlin':79 'json':75 'json-response' 'key':93 'like':153 'limit':97 'lowpaymentfee.com':30 'materi':146 'maximum':127 'metric':159 'micropay':7,20 'micropayment' 'network':10,23,65 'no-api-key' 'offer':47 'page':187 'paramet':169 'part':42 'path':168 'pattern':151 'pay-per-call crypto data' 'payload':179 'payment':60,76,84,119 'per':104 'platform':46 'post':71 'protocol':61 'provid':31,184 'rate':96 'relat':34,157 'request':72,105,172 'requir':99,191 'respons':175 'return':74,135,154 'schema':174,176 'scheme':90 'second':131 'settl':121 'specif':133 'specifi':162 'timeout':128 'token earnings' 'unit':109 'url':150 'usdc':67,111 'usdc-base-network' 'use':66,86 'via':5,18,57,80 'wallet':192 'x':83 'x-payment':82 'x402':6,19,59,88 'x402 finance endpoint' 'x402-payment'","prices":[{"id":"d2a285f2-3adf-4454-bbd0-671e8a23ae41","listingId":"eac016ff-540c-421c-be8b-8f7b01416b8d","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/COIN/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":"2026-04-18T18:32:35.716Z"}],"sources":[{"listingId":"eac016ff-540c-421c-be8b-8f7b01416b8d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/finance/COIN/earnings","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:35.716Z","lastSeenAt":"2026-04-24T20:01:56.787Z"}],"details":{"listingId":"eac016ff-540c-421c-be8b-8f7b01416b8d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/finance/COIN/earnings \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint costs $0.02 per request (20000 base units USDC on Base)","source_url":"https://lowpaymentfee.com"},{"claim":"Platform advertises no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/finance/COIN/earnings"}],"useCases":["Retrieving earnings data for a specific cryptocurrency coin","Integrating coin financial metrics into trading dashboards","Automated agents querying earnings without API key management","Pay-per-use financial data access for portfolio analysis"],"bestFor":["Agents needing on-demand crypto earnings data without subscription","Developers wanting keyless API access via x402 micropayments","Low-volume or sporadic queries where per-call pricing is economical"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users without USDC on Base network","Bulk historical data exports (no batch endpoint documented)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.203Z"},"updatedAt":"2026-04-24T20:01:56.787Z"}}