{"id":"e6e3a1e8-72e2-4fa0-bdba-52448ee08135","shortId":"S9sPC6","kind":"x402","title":"Retrieve employee SSN data via x402 micropayment on Base network for $0.02 per request.","tagline":"Retrieve employee SSN data via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns employee Social Security Number (SSN) data for a specific employee (ID 4) behind an x402 paywall. It accepts POST requests and settles payments in USDC on the Base network. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe provider lowpaymentfee.com hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. This specific endpoint is part of what appears to be a demo or sample employee data API. No OpenAPI schema, request body documentation, or response examples were found in the crawled material; the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content.\n\nGiven the sensitive nature of SSN data, consumers should exercise caution. It is unclear whether this endpoint returns real, synthetic, or placeholder data. No privacy policy, terms of service, or data-source documentation was found in the crawl.","tags":[],"capabilities":["x402-payment","usdc-base","employee-data","ssn-lookup","pay-per-call","no-api-key"],"categories":["data","identity"],"synonyms":["social security number API","employee SSN lookup","x402 employee data","micropayment SSN endpoint","Base USDC API","pay-per-request SSN"],"warnings":["Endpoint returns SSN data — highly sensitive PII. No privacy policy, compliance documentation, or data-source provenance found.","No OpenAPI schema or response examples available; request body format is unknown.","Docs, pricing, and API pages returned only 'Connect wallet' with no substantive content.","It is unclear whether the data returned is real, synthetic, or placeholder.","Endpoint path is hardcoded to employee ID 4; unclear if other IDs are supported."],"endpointUrl":"https://lowpaymentfee.com/api/v1/employees/4/ssn","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/employees/4/ssn","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 captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response documentation, no examples, and the docs pages are empty. The endpoint deals with highly sensitive PII (SSN) with zero documentation on data provenance, compliance, or whether data is real or 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'000':71 '20':70 '4':45 '6':76 'Base USDC API' 'accept':51 'advertis':66 'ai/ml':99 'analyt':98 'api':95,114,138,158 'appear':129 'base':9,23,61,72 'behind':46 'bodi':143 'broad':88 'call':94 'catalog':89 'caution':181 'challeng':65 'commit':121 'connect':164 'consum':178 'content':170 'crawl':152,209 'crypto':102 'data':4,18,39,97,137,177,193,202 'data-sourc':201 'decim':77 'demo':133 'doc':155 'document':144,204 'employe':2,16,34,43,136 'employee SSN lookup' 'employee-data' 'endpoint':30,124,187 'equal':79 'exampl':147 'exercis':180 'financ':101 'found':149,206 'given':171 'host':86 'id':44 'infer':100 'key':115 'limit':118 'lowpaymentfee.com':32,85 'materi':153 'maxamountrequir':68 'micropay':7,21 'micropayment SSN endpoint' 'natur':174 'network':10,24,62 'no-api-key' 'number':37 'openapi':140 'page':159 'part':126 'pay':92 'pay-per-cal':91 'pay-per-call' 'pay-per-request SSN' 'payment':56 'paywal':49 'per':13,27,81,93,110 'placehold':192 'polici':196 'post':52 'price':107,156 'privaci':195 'prompt':166 'provid':84 'rate':117 'real':189 'request':14,28,53,82,111,142 'respons':146 'retriev':1,15 'return':33,161,188 'sampl':135 'schema':141 'secur':36 'sensit':173 'servic':105,199 'settl':55 'social':35 'social security number API' 'sourc':203 'span':96 'specif':42,123 'ssn':3,17,38,176 'ssn-lookup' 'synthet':190 'term':197 'unclear':184 'unit':73 'usdc':58,75 'usdc-base' 'util':104 'via':5,19 'wallet':165 'whether':185 'x402':6,20,48,64 'x402 employee data' 'x402-payment'","prices":[{"id":"11234c50-6e9d-403e-b3d7-7c6c79d72ef5","listingId":"e6e3a1e8-72e2-4fa0-bdba-52448ee08135","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/employees/4/ssn","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:16.533Z"}],"sources":[{"listingId":"e6e3a1e8-72e2-4fa0-bdba-52448ee08135","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/employees/4/ssn","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:16.533Z","lastSeenAt":"2026-04-24T13:32:58.861Z"}],"details":{"listingId":"e6e3a1e8-72e2-4fa0-bdba-52448ee08135","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/employees/4/ssn \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/employees/4/ssn"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/employees/4/ssn"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers APIs across data analytics, AI/ML, finance, crypto, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving employee SSN data behind a micropayment wall","Demonstrating x402 payment protocol integration with sensitive data endpoints","Testing pay-per-call data access patterns on Base network"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing on-demand employee data lookups with crypto micropayments","Testing micropayment-gated API workflows"],"notFor":["Production identity verification (no documentation on data provenance or compliance)","Bulk SSN lookups (single employee ID hardcoded in path)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:14.994Z"},"updatedAt":"2026-04-24T13:32:58.861Z"}}