{"id":"8e70d5f2-8c13-46d7-a13c-c8af482fbce8","shortId":"LNeuMW","kind":"x402","title":"x402-gated premium API endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at `/api/v1/claims/49` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific endpoint is labeled \"Premium API Access\" and accepts POST requests, returning JSON responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 exact payment scheme.\n\nThe platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments required. The x402 challenge captured for this endpoint shows a `maxAmountRequired` of 20000 base units, which at 6 decimals for USDC equals $0.02, consistent with the site's stated pricing. The payment timeout is 300 seconds.\n\nHowever, the specific functionality of the `/api/v1/claims/49` endpoint is unclear. The site's landing page lists various API categories (analytics, AI, finance, utilities) but does not include a \"claims\" endpoint in its public catalog. There is no OpenAPI schema, no detailed documentation, and no request/response examples available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. As a result, the actual data or service returned by this endpoint cannot be confirmed from available materials.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific functionality of /api/v1/claims/49 is unknown — it does not appear in the site's public API catalog","No documentation, OpenAPI schema, or request/response examples are available","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content","The 'claims' path segment does not match any of the advertised API categories on the landing page"],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/49","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/claims/49","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/claims/49 is not described anywhere in the crawled material. The docs pages are empty. This is effectively a stub 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'0.02':10,24,101,140 '0x8335':88 '20000':130 '2913':89 '300':152 '6':135 'Base network API' 'USDC micropayment endpoint' 'accept':72 'access':70 'across':104 'actual':223 'advertis':98 'ai':55,174 'analyt':54,173 'api':5,19,51,69,109,171,203 'avail':200,235 'base':8,22,83,131 'base-network' 'cannot':231 'captur':122 'catalog':187 'categori':172 'challeng':121 'claim':182 'collect':42 'commit':117 'confirm':233 'connect':212 'consist':141 'content':218 'contract':87 'crypto-paid API' 'data':53,224 'decim':136 'detail':194 'doc':202 'document':195 'endpoint':6,20,30,65,106,125,161,183,230 'equal':139 'exact':93 'exampl':199 'financ':58,175 'flat':100 'function':157 'gate':3,17 'howev':154 'includ':180 'infrastructur':61 'json':76 'json-response' 'key':110 'label':67 'land':167 'learn':57 'limit':113 'list':169 'lowpaymentfee' 'lowpaymentfee.com':37 'machin':56 'materi':236 'maxamountrequir':128 'minimum':116 'network':84 'offer':40 'openapi':191 'page':168,207 'part':34 'pay':9,23,48 'pay-per-call API' 'pay-per-request':47 'payment':78,94,149 'per':11,25,49,102 'platform':38,97 'post':73 'post-method' 'premium':4,18,68 'premium API access' 'price':147,204 'prompt':214 'protocol':46 'public':186 'rate':112 'readm':206 'request':12,26,50,74,103 'request/response':198 'requir':118 'respons':77 'result':221 'return':75,209,227 'schema':192 'scheme':95 'second':153 'servic':226 'settl':80 'show':126 'site':144,165 'span':52 'specif':64,156 'state':146 'substant':217 'timeout':150 'unclear':163 'unit':132 'usdc':14,28,86,138 'usdc-settlement' 'use':85 'util':62,176 'various':170 'via':90 'wallet':213 'web3':59 'x402':2,16,45,92,120 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':44","prices":[{"id":"170dee5a-e4a9-4308-9b2b-3b0190a4d0e1","listingId":"8e70d5f2-8c13-46d7-a13c-c8af482fbce8","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/claims/49","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:52.537Z"}],"sources":[{"listingId":"8e70d5f2-8c13-46d7-a13c-c8af482fbce8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/49","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:52.537Z","lastSeenAt":"2026-04-22T10:01:46.293Z"}],"details":{"listingId":"8e70d5f2-8c13-46d7-a13c-c8af482fbce8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/49 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units in USDC on Base with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/claims/49"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/49"}],"useCases":["Accessing a premium data or service endpoint with per-request USDC micropayments","Integrating pay-as-you-go API calls into agent workflows without API key management","Testing x402 protocol payment flows on the Base network"],"bestFor":["Developers experimenting with x402 pay-per-request protocols","Agent systems that need keyless, on-demand API access via crypto micropayments","Low-volume consumers who prefer pay-per-use over subscriptions"],"notFor":["Users who need detailed documentation or well-defined schemas before integration","High-volume production workloads requiring guaranteed SLAs and rate limit transparency","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.274Z"},"updatedAt":"2026-04-22T10:01:46.293Z"}}