{"id":"5ebfdad6-9a1c-48ee-82c5-413696db6a9d","shortId":"zRCrSb","kind":"x402","title":"Mortgage data API endpoint on Base, pay-per-call via x402 with USDC.","tagline":"Mortgage data API endpoint on Base, pay-per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides access to mortgage-related data at the path `/api/v1/mortgages/96`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated via the x402 payment protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/mortgages/96` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation is extremely sparse — the docs, pricing, and API 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 mortgage data is returned or what input parameters the POST body expects. The endpoint is live (returns a proper 402 challenge), but without documentation it is unclear what data fields are available or what the `96` path segment represents (possibly a resource ID for a specific mortgage product or dataset).","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","mortgage-data","pay-per-request","json-response","post-method"],"categories":["finance"],"synonyms":["mortgage API","mortgage data endpoint","home loan API","x402 mortgage","USDC pay-per-call","lowpaymentfee mortgage","real estate finance API"],"warnings":["No documentation available — docs, pricing, and API pages render only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; request body format is unknown","The meaning of '/mortgages/96' (the path segment '96') is undocumented","This endpoint is not listed on the provider's landing page among their advertised APIs, raising questions about its status"],"endpointUrl":"https://lowpaymentfee.com/api/v1/mortgages/96","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/mortgages/96","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on request parameters, response schema, or what mortgage data is actually served. The docs/pricing/API pages are empty beyond a wallet connect prompt. This is effectively a stub 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'/request':131 '0.02':115,130 '000':104 '0x8335':109 '20':103 '2913':110 '402':202 '6':120 '96':218 'USDC pay-per-call' 'accept':89 'access':34 'across':134 'advertis':98 'ai/ml':65 'analyt':64 'api':3,17,61,139,157 'avail':214 'base':6,20,81,105,112 'base-network' 'bodi':193 'broader':49 'call':10,24 'challeng':97,203 'commit':147 'confirm':127 'connect':163 'content':169 'cost':101 'crypto':68 'data':2,16,39,63,184,211 'dataset':232 'decim':121 'descript':180 'doc':154 'document':149,206 'endpoint':4,18,30,87,136,196 'equal':114 'exampl':177 'expect':194 'extrem':151 'field':212 'financ':67 'flat':129 'gate':73 'home loan API' 'id':225 'infer':66 'input':189 'json':94 'json-response' 'key':140 'land':125 'limit':143 'live':198 'lowpaymentfee mortgage' 'lowpaymentfee.com':32,51 'maximum':100 'minimum':146 'model':133 'mortgag':1,15,37,183,229 'mortgage API' 'mortgage data endpoint' 'mortgage-data' 'mortgage-rel':36 'network':82 'offer':53 'openapi':173 'page':126,158 'paramet':190 'part':46 'path':42,219 'pay':8,22,58 'pay-per-cal':7,21 'pay-per-request':57 'payment':77 'per':9,23,59,116 'platform':50,123 'possibl':222 'post':90,192 'post-method' 'price':132,155 'product':230 'prompt':165 'proper':201 'protocol':78 'provid':33 'rate':142 'real estate finance API' 'relat':38 'render':160 'repres':221 'request':60,91,117 'request/response':176 'requir':148 'resourc':224 'return':93,186,199 'schema':174 'segment':220 'servic':71 'span':62 'spars':152 'specif':86,228 'unclear':209 'unit':106 'usdc':14,28,84,108,118 'usdc-settlement' 'use':83,119 'util':70 'varieti':55 'via':11,25,74 'wallet':164 'without':205 'x402':12,26,76,96 'x402 mortgage' 'x402-payment'","prices":[{"id":"9fca4880-03df-4689-b21a-f5dd05eeaf78","listingId":"5ebfdad6-9a1c-48ee-82c5-413696db6a9d","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/mortgages/96","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:41.455Z"}],"sources":[{"listingId":"5ebfdad6-9a1c-48ee-82c5-413696db6a9d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/mortgages/96","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:41.455Z","lastSeenAt":"2026-04-29T04:09:17.585Z"}],"details":{"listingId":"5ebfdad6-9a1c-48ee-82c5-413696db6a9d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/mortgages/96 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/mortgages/96"},{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals","source_url":"https://lowpaymentfee.com/api/v1/mortgages/96"}],"useCases":["Retrieving mortgage-related data for financial analysis or comparison tools","Integrating mortgage information into agent workflows that can settle payments via x402","Programmatic access to mortgage data without API key registration"],"bestFor":["Agents or apps that can pay per-call via x402 on Base with USDC","Developers wanting frictionless, keyless access to mortgage data","Prototyping financial tools that need on-demand mortgage information"],"notFor":["Users who need detailed documentation or schema before integrating","High-volume consumers who need bulk/batch mortgage data at lower per-unit cost","Anyone unable to transact on the Base L2 network with USDC"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:12.052Z"},"updatedAt":"2026-04-29T04:09:17.585Z"}}