{"id":"16b049c9-3586-4ca6-99d8-b59d8f752caa","shortId":"TR9TRT","kind":"x402","title":"x402-gated loan data endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated loan data endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com provides access to a specific loan resource (loan ID 17) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 \"exact\" scheme, meaning a one-shot payment per call with no API keys, subscriptions, or rate limits required.\n\nThe broader lowpaymentfee.com platform advertises a range of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02/request price point. However, this specific listing is for the `/api/v1/loans/17` endpoint, which is described only as \"Premium API Access\" with no further documentation on what loan data it returns or what input it expects beyond a POST request.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no examples available. The endpoint accepts POST requests and returns application/json, but the actual payload structure is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","loan-data","json-api","no-api-key"],"categories":["finance","data"],"synonyms":["loan API","x402 loan endpoint","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","loan data endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No request or response schema provided; unknown what data the endpoint returns","The endpoint path '/api/v1/loans/17' targets a specific loan ID with no explanation of what loan 17 represents","No OpenAPI spec or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/17","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/loans/17","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, but there is virtually no documentation: no OpenAPI spec, no request/response schema, no examples, and no explanation of what loan data is returned. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':150 '0.02':70,149 '000':72 '17':42 '20':71 '402':55 '6':78 'Base network API' 'USDC micropayment API' 'accept':225 'access':34,169 'actual':233 'advertis':109 'ai/ml':121 'analysi':124 'analyt':120 'api':98,117,168,195 'application/json':230 'avail':222 'base':8,22,63,73 'beyond':185 'broader':106 'call':95 'challeng':56 'classif':126 'connect':204 'content':210 'convers':143 'data':5,19,119,177 'decim':79 'describ':164 'doc':194 'document':173,189 'embed':127 'endpoint':6,20,30,49,161,224 'estim':137 'exact':86 'exampl':221 'exchang':132 'expect':184 'extrem':191 'feed':131 'financ':128 'gas':136 'gate':3,17 'generat':144 'geocod':141 'howev':153 'id':41 'infer':122 'infrastructur':139 'input':182 'json-api' 'key':99 'limit':103 'list':156 'live':51 'loan':4,18,38,40,176 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':32,107 'made':82 'mean':88 'network':64 'no-api-key' 'one':91 'one-shot':90 'openapi':214 'page':199 'pay':10,24,114 'pay-per-call API' 'pay-per-request':9,23,113 'payload':234 'payment':46,58,80,93 'per':11,25,67,94,115 'platform':108 'point':152 'post':187,226 'premium':167 'price':66,130,151,196 'prompt':206 'protocol':47 'provid':33 'quot':135 'rang':111 'rate':102,133 'readm':198 'render':201 'request':12,26,68,116,188,227 'request/response':217 'requir':57,104 'resourc':39 'return':53,179,229 'schema':218 'scheme':87 'sentiment':123 'shot':92 'span':118 'spars':192 'spec':215 'specif':37,155 'structur':235 'subscript':100 'substant':209 'summar':125 'token':134 'unit':74 'unknown':237 'usdc':14,28,60,76 'usdc-base' 'util':140 'valid':142 'via':43,83 'wallet':205 'web3':129 'x402':2,16,45,85 'x402 loan endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"335ca7ec-af83-49fa-9df4-5cd36e8b19fd","listingId":"16b049c9-3586-4ca6-99d8-b59d8f752caa","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/loans/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:21.580Z"}],"sources":[{"listingId":"16b049c9-3586-4ca6-99d8-b59d8f752caa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/17","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:21.580Z","lastSeenAt":"2026-04-28T14:35:03.135Z"}],"details":{"listingId":"16b049c9-3586-4ca6-99d8-b59d8f752caa","quickStartSnippet":"# Requires an x402-compatible client to attach payment header\ncurl -X POST https://lowpaymentfee.com/api/v1/loans/17 \\\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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/17"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units of USDC, 6 decimals)","source_url":"https://lowpaymentfee.com/api/v1/loans/17"},{"claim":"Platform advertises no API keys, no rate limits, instant access, $0.02/request pricing","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/17"}],"useCases":["Retrieving loan data for loan ID 17 via a single paid API call","Integrating pay-per-request loan information into agent workflows","Accessing financial loan records without API key registration"],"bestFor":["Agents or developers needing on-demand loan data without subscription commitments","x402-compatible clients on the Base network","Micropayment-based API consumption with USDC"],"notFor":["Users needing detailed API documentation or schema before integrating","Bulk or high-volume loan data retrieval where per-request pricing is inefficient","Non-crypto users who cannot pay with USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.893Z"},"updatedAt":"2026-04-28T14:35:03.135Z"}}