{"id":"d2c0fd8d-c7da-4eb0-af6c-7173c8e271a7","shortId":"fkqvSG","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com is part of a broader suite of x402-protocol APIs covering data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities. The specific endpoint `/api/v1/claims/7` is listed under \"Premium API Access\" but its exact functionality is not documented beyond that label. All endpoints on the platform share the same pricing model: $0.02 per request, paid in USDC on the Base network via the x402 payment protocol.\n\nThe platform advertises a no-friction model: no API keys, no rate limits, no subscriptions, and instant access. Payment is handled per-request through the x402 challenge-response flow — callers receive a 402 response with payment details, settle in USDC on Base, and then receive the API response. The x402 challenge confirms the endpoint is live, accepting payments to address `0x1A2B...85F3` with a max amount of 20,000 base units (i.e., $0.02 USDC given 6 decimals).\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what `/api/v1/claims/7` actually returns. The broader site lists many endpoint categories (sentiment analysis, summarization, geocoding, price feeds, etc.) but this specific claims endpoint is not among them, making its purpose unclear.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","premium-api-access"],"categories":["api-gateway","misc"],"synonyms":["x402 API","pay-per-request API","USDC micropayment API","Base network API","lowpaymentfee","claims API","402 payment endpoint"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The specific endpoint /api/v1/claims/7 is not listed among the site's advertised API categories, making its purpose unknown.","No OpenAPI schema, no request body schema, and no response examples are provided.","Functionality must be discovered empirically after payment — risky for agents."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/7","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/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC per request on Base). However, there is no documentation for what /api/v1/claims/7 actually does, no request/response schema, no examples, and the docs pages are empty. The endpoint name 'Premium API Access' is generic and 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'0.02':10,28,93,183 '000':179 '0x1a2b':171 '20':178 '402':143 '402 payment endpoint' '6':186 '85f3':172 'Base network API' 'USDC micropayment API' 'accept':167 'access':6,24,72,126 'actual':224 'address':170 'advertis':110 'ai/ml':55 'among':247 'amount':176 'analysi':234 'analyt':54 'api':5,16,23,34,51,71,117,157,195 'base':8,26,101,152,180 'beyond':80 'broader':45,227 'caller':140 'categori':232 'challeng':137,161 'challenge-respons':136 'claim':243 'claims API' 'confirm':162 'connect':203 'content':209 'cover':52 'data':53,59 'decim':187 'descript':220 'detail':147 'doc':193 'document':79,188 'endpoint':38,65,84,164,231,244 'etc':239 'exact':75 'exampl':217 'extrem':190 'feed':238 'financ':57 'flow':139 'friction':114 'function':76 'gate':3,21 'geocod':236 'given':185 'handl':129 'i.e':182 'infer':56 'infrastructur':61 'instant':125 'key':17,35,118 'label':82 'limit':121 'list':68,229 'live':166 'lowpaymentfee' 'lowpaymentfee.com':40 'make':249 'mani':230 'max':175 'model':92,115 'network':102 'no-api-key' 'no-frict':112 'openapi':213 'page':198 'paid':96 'part':42 'pay':9,27 'pay-per-request API' 'payment':106,127,146,168 'per':11,29,94,131 'per-request':130 'per-request-billing' 'platform':87,109 'premium':4,22,70 'premium-api-access' 'price':91,194,237 'prompt':205 'protocol':50,107 'purpos':251 'rate':120 'readm':197 'receiv':141,155 'render':200 'request':12,30,95,132 'request/response':216 'requir':18,36 'respons':138,144,158 'return':225 'schema':214 'sentiment':233 'settl':148 'share':88 'site':228 'spars':191 'specif':64,242 'subscript':123 'suit':46 'summar':235 'unclear':252 'unit':181 'usdc':14,32,98,150,184 'usdc-base' 'util':62 'via':103 'wallet':204 'web3':58 'x402':2,20,49,105,135,160 'x402 API' 'x402-gated':1,19 'x402-payment' 'x402-protocol':48","prices":[{"id":"e1e395d0-ff40-4b71-a641-34948af20f41","listingId":"d2c0fd8d-c7da-4eb0-af6c-7173c8e271a7","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/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:04.594Z"}],"sources":[{"listingId":"d2c0fd8d-c7da-4eb0-af6c-7173c8e271a7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/7","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:04.594Z","lastSeenAt":"2026-04-22T05:31:04.642Z"}],"details":{"listingId":"d2c0fd8d-c7da-4eb0-af6c-7173c8e271a7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/7 \\\n  -H \"Content-Type: application/json\"\n# Returns 402 with x402 payment challenge; attach X-PAYMENT header after settling USDC on Base.","exampleRequest":null,"exampleResponse":{"error":"X-PAYMENT header is required","accepts":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/claims/7","description":"Premium API Access","maxAmountRequired":"20000","maxTimeoutSeconds":300}],"x402Version":1},"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns 402 with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/7"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a premium data or service endpoint with per-call USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to undocumented claims data"],"bestFor":["Developers or agents wanting frictionless, keyless API access via x402","Micropayment-based API consumption on Base L2","Exploring x402 protocol integrations"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Production workloads requiring well-documented request/response schemas","Anyone needing free or fiat-only payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:19.706Z"},"updatedAt":"2026-04-22T05:31:04.642Z"}}