{"id":"1f17ab76-3de4-4e42-8b4a-c62a49535ed1","shortId":"kLuw9Y","kind":"x402","title":"Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to a specific loan record (ID 49) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nThe provider lowpaymentfee.com hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are advertised at $0.02 per request with no API keys, no rate limits, and no minimum commitments — payment is handled entirely through the x402 protocol.\n\nDocumentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The specific purpose and schema of the /api/v1/loans/49 endpoint is not documented on the landing page (it does not appear in the listed API catalog), so its exact data content is unknown. The endpoint is confirmed live via a valid 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","loan-data","json-response","no-api-key"],"categories":["finance","data"],"synonyms":["loan API","loan data endpoint","x402 API","pay-per-request API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet'","The /api/v1/loans/49 endpoint is not listed in the provider's own API catalog on the landing page","No request or response schema is documented; payload structure is unknown","No OpenAPI or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/49","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/49","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and this specific loans/49 endpoint isn't even listed in the provider's own catalog. Effectively a stub 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'/api/v1/loans/49':200 '/docs':161 '/pricing':163 '/readme':165 '/request':17,34 '0.02':16,33,83,134 '000':78 '0x8335':70 '20':77 '2913':71 '402':233 '49':47 '6':88 'Base network API' 'USDC micropayment API' 'accept':54 'access':40 'advertis':132 'ai/ml':106 'analyt':105 'api':102,139,216 'appear':212 'avail':192 'base':9,26,65,79 'base-network' 'broad':95 'call':4,21,101 'catalog':96,217 'challeng':234 'classif':110 'commit':147 'confirm':228 'connect':171 'content':222 'contract':69 'convers':127 'cost':75 'data':6,23,104,221 'decim':89 'detail':178 'document':156,187,204 'embed':111 'endpoint':7,24,36,130,201,226 'entir':151 'equal':82 'estim':121 'exact':220 'exampl':190 'exchang':116 'extrem':158 'feed':115 'financ':112 'gas':120 'generat':128 'geocod':125 'handl':150 'host':93 'id':46 'infer':107 'infrastructur':123 'json':59 'json-response' 'key':140 'land':207 'limit':143 'list':215 'live':229 'loan':5,22,44 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':38,92 'maximum':74 'minimum':146 'network':66 'no-api-key' 'openapi':182 'page':166,208 'pay':2,19,99 'pay-per-cal':1,18,98 'pay-per-call' 'pay-per-request API' 'payload':191 'payment':51,60,148 'per':3,20,84,100,135 'post':55 'price':114 'prompt':173 'protocol':52,155 'provid':39,91 'purpos':195 'quot':119 'rate':117,142 'record':45 'render':168 'request':56,85,136 'request/response':185 'return':58 'schema':186,197 'sentiment':108 'settl':12,29,62 'span':103 'spars':159 'spec':183 'specif':43,194 'summar':109 'technic':177 'token':118 'unit':80 'unknown':224 'usdc':14,31,68,86 'usdc-settlement' 'use':67,87 'util':124 'valid':126,232 'via':10,27,48,230 'wallet':172 'web3':113 'x402':11,28,50,154 'x402 API' 'x402-payment'","prices":[{"id":"bf3040bc-9309-4976-aa2b-b0cebde24312","listingId":"1f17ab76-3de4-4e42-8b4a-c62a49535ed1","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/49","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:40.994Z"}],"sources":[{"listingId":"1f17ab76-3de4-4e42-8b4a-c62a49535ed1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/49","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:40.994Z","lastSeenAt":"2026-04-28T13:33:35.519Z"}],"details":{"listingId":"1f17ab76-3de4-4e42-8b4a-c62a49535ed1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/49 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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/loans/49"},{"claim":"All listed APIs are 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":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/49"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan record data on-demand with per-call USDC micropayments","Integrating loan information into agent workflows without API key management","Programmatic access to financial loan data settled on Base L2"],"bestFor":["Agents or apps needing keyless, pay-per-call access to loan data","Developers experimenting with x402 payment protocol integrations","Scenarios requiring no-commitment, no-rate-limit API access"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Bulk retrieval of many loan records (no batch endpoint documented)","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.008Z"},"updatedAt":"2026-04-28T13:33:35.519Z"}}