{"id":"a41a14ed-b68e-42b6-91bf-fc8f38ccff7b","shortId":"Cx32Hr","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The specific endpoint `/api/v1/claims/26` is labeled \"Premium API Access\" and is gated behind the x402 payment protocol on the Base network. Payment is settled in USDC (contract 0x8335…2913) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nThe platform advertises a no-API-key, no-rate-limit model where callers pay per request with no minimums or commitments. The x402 challenge was successfully captured with version 1, confirming the endpoint is live. However, the specific functionality behind `/api/v1/claims/26` is not documented — the description simply says \"Premium API Access\" without detailing what data or service is returned. The site's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional technical documentation or schema information.\n\nThe broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at $0.02/request. Without documentation on what `/api/v1/claims/26` specifically returns or what input it expects, callers should treat this as an exploratory endpoint. The POST method is indicated in the outputSchema.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","post-method","no-api-key","no-rate-limit"],"categories":["api-gateway","payments"],"synonyms":["x402 API","micropayment API","pay-per-call","USDC API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific functionality of /api/v1/claims/26 is undocumented — 'Premium API Access' is the only description available.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no technical content.","No request body schema or response schema is provided; callers cannot know what to send or expect back.","No OpenAPI spec or AI plugin manifest is available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/26","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/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no documentation on what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty (wallet-connect only). The specific purpose of '/api/v1/claims/26' is 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'/request':13,28,219 '0.02':12,27,95,218 '000':90 '0x8335':82 '1':133 '20':89 '2913':83 '6':100 'Base network API' 'USDC API' 'access':7,22,63,154 'across':47 'addit':180 'advertis':104 'ai/ml':50 'analysi':198 'analyt':49 'api':6,21,46,62,108,153,169 'base':9,24,74,91 'base-network' 'behind':67,143 'broader':39,187 'call':4,19 'caller':116,232 'captur':130 'categori':54 'challeng':127 'classif':201 'commit':124 'confirm':134 'connect':175 'contract':81 'convers':213 'cost':87 'crypto-paid API' 'data':48,158,194 'decim':101 'descript':149 'detail':156 'doc':166 'document':147,182,221 'embed':202 'endpoint':32,57,136,190,239 'equal':94 'estim':210 'exchang':205 'expect':231 'exploratori':238 'export':195 'feed':204 'finance/web3':51 'function':142 'gas':209 'gate':66 'generat':215 'geocod':211 'howev':139 'indic':244 'inform':185 'infrastructur':53 'input':229 'insight':196 'key':109 'label':60 'limit':113 'list':189 'live':138 'lowpaymentfee' 'lowpaymentfee.com':34 'maximum':86 'method':242 'metric':192 'micropayment API' 'minimum':122 'model':114 'network':75 'no-api-key':106 'no-rate-limit':110 'offer':41 'outputschema':247 'page':170 'part':36 'pay':2,17,43,117 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request':42 'payment':70,76 'per':3,18,44,96,118 'platform':40,103,188 'post':241 'post-method' 'premium':5,20,61,152 'premium API access' 'price':167,203 'prompt':177 'protocol':71 'quot':208 'rate':112,206 'render':172 'report':193 'request':45,97,119 'return':162,226 'say':151 'schema':184 'sentiment':197 'servic':160 'settl':78 'simpli':150 'site':164 'specif':56,141,225 'success':129 'summar':200 'technic':181 'text':199 'token':207 'treat':234 'unit':92 'usdc':15,30,80,98 'usdc-settlement' 'use':99 'valid':212 'version':132 'via':10,25 'wallet':176 'without':155,220 'x402':11,26,69,126 'x402 API' 'x402-payment'","prices":[{"id":"1e50337c-2724-49bc-ad11-574af4cbbdeb","listingId":"a41a14ed-b68e-42b6-91bf-fc8f38ccff7b","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/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:50.104Z"}],"sources":[{"listingId":"a41a14ed-b68e-42b6-91bf-fc8f38ccff7b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/26","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:50.104Z","lastSeenAt":"2026-04-23T20:32:29.685Z"}],"details":{"listingId":"a41a14ed-b68e-42b6-91bf-fc8f38ccff7b","quickStartSnippet":"# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.\n# Without payment, it returns a 402 challenge.\ncurl -X POST https://lowpaymentfee.com/api/v1/claims/26 \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/26"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/26"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without needing API keys or subscriptions","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-request services into agent workflows"],"bestFor":["Developers who want keyless, pay-as-you-go API access","AI agents with x402-compatible payment capabilities","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation before calling","High-volume use cases where per-call pricing may add up","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.397Z"},"updatedAt":"2026-04-23T20:32:29.685Z"}}