{"id":"c25e1936-442c-4b27-81f8-45e63ca9688b","shortId":"JWr3dm","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 marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/stripe/charges/185` is listed as \"Premium API Access\" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme with no API keys, rate limits, or upfront commitments 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 the same $0.02/request price point.\n\nHowever, the specific endpoint being listed here (`/api/v1/stripe/charges/185`) does not clearly map to any of the documented API categories. Its path suggests it may relate to Stripe charge operations, but no documentation describes its input parameters or response format. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without an OpenAPI schema, request/response examples, or detailed documentation, the actual functionality of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","no-api-key","http-post"],"categories":["payments","api-marketplace"],"synonyms":["x402 api","micropayment api","pay-per-request","usdc api access","base network api","lowpaymentfee","stripe charges api"],"warnings":["No OpenAPI or schema documentation available for this endpoint","All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' with no content","The endpoint path /api/v1/stripe/charges/185 does not correspond to any of the advertised API categories on the homepage","No request body schema or response format documented — actual functionality is unclear","No input/output examples available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/185","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/stripe/charges/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns 402 with a valid x402 challenge), and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no meaningful documentation (all doc pages return only 'Connect wallet'), and the endpoint path does not match any of the advertised API categories. The actual functionality is 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'/request':17,34,160 '0.02':16,33,78,92,159 '000':84 '20':83 '6':90 'access':45,73 'actual':230 'advertis':114 'ai':10,27,126 'analysi':130 'analyt':120 'api':4,21,41,72,103,118,180,204 'base':7,24,61,85 'base network api' 'behind':51 'broader':112 'call':80 'categori':116,181 'charg':190 'classif':133 'clear':173 'commit':109 'connect':213 'content':219 'convers':150 'cost':75 'data':9,26,119,123 'decim':91 'describ':195 'detail':227 'doc':203 'document':179,194,228 'embed':134 'endpoint':14,31,50,65,153,166,234 'estim':144 'exact':99 'exampl':225 'exchang':139 'export':124 'feed':138 'financ':11,28,135 'format':201 'four':115 'function':231 'gas':143 'gate':3,20,44 'generat':151 'geocod':148 'howev':163 'http-post' 'infrastructur':146 'input':197 'insight':125 'key':104 'learn':128 'limit':106 'list':69,155,168 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':127 'made':95 'map':174 'marketplac':42 'maxamountrequir':81 'may':186 'metric':121 'micropay':55 'micropayment api' 'network':62 'no-api-key' 'offer':8,25 'openapi':222 'oper':191 'page':208 'paramet':198 'path':183 'pay-per-request' 'payment':93 'per':53,79 'per-request':52 'per-request-micropayment' 'platform':5,22,113 'point':162 'premium':71 'price':137,161,205 'prompt':215 'protocol':40 'quot':142 'rate':105,140 'readm':207 'relat':187 'remain':235 'report':122 'request':54 'request/response':224 'requir':110 'respons':200 'return':210 'schema':223 'scheme':100 'sentiment':129 'settl':56 'specif':64,165 'stripe':189 'stripe charges api' 'substant':218 'suggest':184 'summar':132 'text':131 'token':141 'unclear':236 'unit':86 'upfront':108 'usdc':58,88 'usdc api access' 'usdc-base' 'util':13,30,147 'valid':149 'varieti':48 'via':96 'wallet':214 'web3':136 'without':220 'x402':2,19,39,98 'x402 api' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"f8ca5c3f-7c10-4c6e-8b1d-04d80edaa437","listingId":"c25e1936-442c-4b27-81f8-45e63ca9688b","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/stripe/charges/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:03.472Z"}],"sources":[{"listingId":"c25e1936-442c-4b27-81f8-45e63ca9688b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/185","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:03.472Z","lastSeenAt":"2026-04-22T20:01:24.605Z"}],"details":{"listingId":"c25e1936-442c-4b27-81f8-45e63ca9688b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/185 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/185"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, rate limits, or minimums","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/185"}],"useCases":["Paying per-request for API access without needing API keys or subscriptions","Programmatic access to gated endpoints using USDC micropayments on Base","Agent-driven API consumption with x402 payment protocol"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over traditional API key management"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:56.475Z"},"updatedAt":"2026-04-22T20:01:24.605Z"}}