{"id":"fe7dfb20-cf84-4528-bf8c-a594d94a973f","shortId":"UpMYZ4","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API platform that gates a variety of endpoints behind per-request USDC micropayments on the Base network. The specific endpoint at `/api/v1/accounts/180` is listed as \"Premium API Access\" and requires up to $0.02 in USDC per call (maxAmountRequired of 20,000 base units with 6 decimals = $0.02). Payment is made via the x402 exact scheme with no API keys, no rate limits, and no subscriptions required.\n\nThe broader platform advertises four categories of APIs: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request. The platform settles payments in USDC on the Base L2 network.\n\nDocumentation is extremely sparse — the docs, pricing, API, 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 detailed documentation for what the `/api/v1/accounts/180` endpoint actually returns. The endpoint is live and responds with a valid x402 402 challenge, but the actual functionality behind this specific path is unclear from available materials.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","json-response","post-method"],"categories":["api-platform","finance","ai"],"synonyms":["low payment fee","x402 api","micropayment api","pay-per-request api","base usdc api","402 payment api"],"warnings":["No documentation available — all doc/pricing/API pages render only 'Connect wallet' with no content","The specific purpose and response format of /api/v1/accounts/180 is unknown; 'Premium API Access' is the only description","No OpenAPI schema or request/response examples are provided","No robots.txt or agents.txt found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/180","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/accounts/180","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 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no documentation, no request/response examples, and the specific purpose of /api/v1/accounts/180 is entirely unclear. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':17,34 '0.02':16,33,74,88,154 '000':82 '20':81 '402':219 '402 payment api' '6':86 'access':69 'actual':207,223 'advertis':111 'ai':10,27,123 'analysi':127 'analyt':117 'api':4,21,41,68,99,115,175 'avail':232 'base':7,24,57,83,165 'base usdc api' 'base-network' 'behind':49,225 'broader':109 'call':78 'categori':113 'challeng':220 'classif':130 'connect':183 'content':189 'convers':147 'data':9,26,116,120 'decim':87 'detail':200 'doc':173 'document':168,201 'embed':131 'endpoint':14,31,48,61,150,206,210 'estim':141 'exact':95 'exampl':197 'exchang':136 'export':121 'extrem':170 'feed':135 'financ':11,28,132 'four':112 'function':224 'gas':140 'gate':3,20,44 'generat':148 'geocod':145 'infrastructur':143 'insight':122 'json-response' 'key':100 'l2':166 'learn':125 'limit':103 'list':65,152 'live':212 'low payment fee' 'lowpaymentfee.com':35 'machin':124 'made':91 'materi':233 'maxamountrequir':79 'metric':118 'micropay':54 'micropayment api' 'network':58,167 'no-api-key' 'offer':8,25 'openapi':193 'page':178 'path':228 'pay-per-request api' 'payment':89,160 'per':51,77,155 'per-request':50 'per-request-billing' 'platform':5,22,42,110,158 'post-method' 'premium':67 'price':134,174 'prompt':185 'protocol':40 'quot':139 'rate':102,137 'readm':177 'render':180 'report':119 'request':52,156 'request/response':196 'requir':71,107 'respond':214 'return':208 'schema':194 'scheme':96 'sentiment':126 'settl':159 'spars':171 'specif':60,227 'subscript':106 'substant':188 'summar':129 'text':128 'token':138 'unclear':230 'unit':84 'usdc':53,76,162 'usdc-micropayment' 'util':13,30,144 'valid':146,217 'varieti':46 'via':92 'wallet':184 'web3':133 'x402':2,19,39,94,218 'x402 api' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"69c253d9-cc15-46f2-afec-1c49782ed1e1","listingId":"fe7dfb20-cf84-4528-bf8c-a594d94a973f","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/accounts/180","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:30.716Z"}],"sources":[{"listingId":"fe7dfb20-cf84-4528-bf8c-a594d94a973f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/180","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:30.716Z","lastSeenAt":"2026-04-22T18:31:13.908Z"}],"details":{"listingId":"fe7dfb20-cf84-4528-bf8c-a594d94a973f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/180 \\\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 returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/180"},{"claim":"The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/180"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Pay-as-you-go access to data, AI, finance, or utility endpoints"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Applications requiring free or fiat-only payment methods","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.012Z"},"updatedAt":"2026-04-22T18:31:13.908Z"}}