{"id":"f59d5cb4-9598-417f-896a-0accdc70d6fc","shortId":"mZJww4","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 a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/wire/79` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 exact scheme — no API keys, no rate limits, and no subscriptions required.\n\nThe broader platform advertises four categories of endpoints: 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 listed endpoints share the same $0.02/request pricing. However, the specific functionality behind the `/api/v1/wire/79` path is not documented beyond the generic \"Premium API Access\" label, so it is unclear which of these services (if any) it maps to.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, 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 detailed description of what this endpoint actually returns. Agents should be aware that while the endpoint is live and responding with a valid 402 challenge, the lack of documentation makes it difficult to know what to send or expect back.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","http-post","json-response"],"categories":["api-marketplace","misc"],"synonyms":["lowpaymentfee","low payment fee API","x402 micropayment API","pay-per-call API","USDC API access","Base network API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.","The specific functionality of /api/v1/wire/79 ('Premium API Access') is undocumented; it is unclear what data or service it provides.","No OpenAPI schema or request/response examples are available.","No robots.txt or agents.txt found on the origin."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/79","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/wire/79","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","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 documentation, no OpenAPI schema, no request/response examples, and the endpoint's actual functionality behind the 'Premium API Access' label is completely unknown. This is effectively a stub 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'/api/v1/wire/79':65,162 '/docs':192 '/pricing':194 '/readme':196 '/request':17,34,154 '0.02':16,33,76,153 '000':80 '20':79 '402':242 '6':86 'Base network API' 'USDC API access' 'access':71,172 'actual':225 'advertis':109 'agent':227 'ai':10,27,121 'analysi':125 'analyt':115 'api':4,21,41,70,97,171 'awar':230 'back':258 'base':7,24,59,81 'behind':49,160 'beyond':167 'broader':107 'call':78 'categori':111 'challeng':243 'classif':128 'connect':202 'content':208 'convers':145 'cost':73 'data':9,26,114,118 'decim':87 'descript':220 'detail':219 'difficult':250 'document':166,187,247 'embed':129 'endpoint':14,31,48,63,113,149,224,234 'estim':139 'exact':94 'exampl':216 'exchang':134 'expect':257 'export':119 'extrem':189 'feed':133 'financ':11,28,130 'four':110 'function':159 'gas':138 'gate':3,20,44 'generat':146 'generic':169 'geocod':143 'handl':90 'howev':156 'http-post' 'infrastructur':141 'insight':120 'json-response' 'key':98 'know':252 'label':173 'lack':245 'learn':123 'limit':101 'list':67,148 'live':236 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':122 'make':248 'map':185 'marketplac':42 'metric':116 'micropay':53 'network':60 'offer':8,25 'openapi':212 'page':197 'path':163 'pay-per-call API' 'payment':88 'per':51,77 'per-request':50 'per-request-micropayment' 'platform':5,22,108 'premium':69,170 'price':132,155 'prompt':204 'protocol':40 'quot':137 'rate':100,135 'render':199 'report':117 'request':52 'request/response':215 'requir':105 'respond':238 'return':226 'schema':213 'scheme':95 'send':255 'sentiment':124 'servic':181 'settl':54 'share':150 'spars':190 'specif':62,158 'subscript':104 'summar':127 'text':126 'token':136 'unclear':177 'unit':82 'usdc':56,84 'usdc-base' 'util':13,30,142 'valid':144,241 'varieti':46 'via':91 'wallet':203 'web3':131 'x402':2,19,39,93 'x402 micropayment API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"5e7777a0-48b1-4ab3-9b22-93927964fbfb","listingId":"f59d5cb4-9598-417f-896a-0accdc70d6fc","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/wire/79","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:07.105Z"}],"sources":[{"listingId":"f59d5cb4-9598-417f-896a-0accdc70d6fc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/79","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:07.105Z","lastSeenAt":"2026-04-22T05:31:50.828Z"}],"details":{"listingId":"f59d5cb4-9598-417f-896a-0accdc70d6fc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/79 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/79"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/79"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Four categories of endpoints listed: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-request for API access without API keys or subscriptions","Integrating micropayment-gated services into agent workflows on Base","Accessing data, AI, finance, or utility endpoints via x402 protocol"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Developers wanting zero-commitment, pay-as-you-go API access","Exploring x402 protocol integrations at low cost ($0.02/call)"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-throughput use cases where per-request payment overhead is impractical","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.21Z"},"updatedAt":"2026-04-22T05:31:50.828Z"}}