{"id":"c75401d7-b668-4ff9-ad83-bad8b47ae379","shortId":"3SD4eJ","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 record (ID 197) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled in USDC on the Base network using the x402 \"exact\" scheme.\n\nThe x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). The provider's landing page confirms a flat $0.02/request pricing model across all their API endpoints, with no API keys, no rate limits, and instant access.\n\nThe broader lowpaymentfee.com platform offers additional endpoint categories including data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, gas estimates), and infrastructure utilities (geocoding, validation, conversion). All endpoints share the same $0.02 per-request pricing. Documentation pages beyond the landing page were largely empty (showing only a \"Connect wallet\" prompt), so detailed request/response schemas for this specific SSN endpoint are not available.","tags":[],"capabilities":["x402-payment","usdc-base","employee-data","ssn-lookup","per-request-micropayment","json-response","post-method"],"categories":["data","pii"],"synonyms":["social security number API","employee SSN lookup","PII endpoint","employee data API","x402 data access","micropayment SSN","Base USDC API"],"warnings":["This endpoint exposes Social Security Numbers (PII/regulated data). Verify compliance with applicable privacy laws (e.g., HIPAA, state SSN protection statutes) before use.","No API documentation, OpenAPI spec, or response schema is available — the docs, API, pricing, and README pages all returned only a 'Connect wallet' prompt.","It is unclear whether this is real employee data or synthetic/demo data. Exercise extreme caution.","The endpoint path is hardcoded to employee ID 197; it is unknown whether other employee IDs are supported.","No authentication or authorization mechanism beyond payment is documented, raising concerns about access control for sensitive data."],"endpointUrl":"https://lowpaymentfee.com/api/v1/employees/197/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/197/ssn","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page, and the endpoint serves highly sensitive PII (SSN) with no visible compliance or authorization framework. The specific employee ID (197) is hardcoded in the URL, and it's unclear whether other IDs are supported or what the response format looks 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'0.02':12,26,92,106,162 '000':81 '0x8335':86 '197':46 '20':80 '2913':87 '6':96 'Base USDC API' 'PII endpoint' 'accept':53 'access':124 'across':110 'addit':130 'advertis':76 'ai/ml':136 'analysi':139 'analyt':135 'api':113,117 'avail':193 'base':9,23,66,82,89 'behind':47 'beyond':169 'broader':126 'categori':132 'challeng':75 'classif':141 'confirm':103 'connect':179 'convers':156 'data':4,18,39,134,144 'decim':97 'detail':183 'document':167 'embed':142 'employe':2,16,34,43 'employee SSN lookup' 'employee data API' 'employee-data' 'empti':175 'endpoint':30,52,114,131,158,190 'equal':91 'estim':150 'exact':71 'exchang':147 'feed':146 'finance/web3':143 'flat':105 'gas':149 'geocod':154 'id':45 'includ':133 'infer':137 'infrastructur':152 'instant':123 'json':58 'json-response' 'key':118 'land':101,171 'larg':174 'limit':121 'lowpaymentfee.com':32,127 'maxamountrequir':78 'micropay':7,21 'micropayment SSN' 'model':109 'network':10,24,67 'number':37 'offer':129 'page':102,168,172 'payment':59 'paywal':50 'per':13,27,164 'per-request':163 'per-request-micropayment' 'platform':128 'post':54 'post-method' 'price':108,145,166 'prompt':181 'provid':99 'rate':120,148 'record':44 'request':14,28,55,165 'request/response':184 'retriev':1,15 'return':33,57 'schema':185 'scheme':72 'secur':36 'sentiment':138 'settl':61 'share':159 'show':176 'social':35 'social security number API' 'specif':42,188 'ssn':3,17,38,189 'ssn-lookup' 'summar':140 'unit':83 'usd':93 'usdc':63,85,94 'usdc-base' 'use':68,95 'util':153 'valid':155 'via':5,19 'wallet':180 'x402':6,20,49,70,74 'x402 data access' 'x402-payment'","prices":[{"id":"58ea020c-6b0f-4e49-bc18-f1821e6f6b1b","listingId":"c75401d7-b668-4ff9-ad83-bad8b47ae379","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/197/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":"2026-04-21T18:32:15.930Z"}],"sources":[{"listingId":"c75401d7-b668-4ff9-ad83-bad8b47ae379","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/employees/197/ssn","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:15.930Z","lastSeenAt":"2026-04-24T17:34:04.324Z"}],"details":{"listingId":"c75401d7-b668-4ff9-ad83-bad8b47ae379","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/employees/197/ssn \\\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 x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/employees/197/ssn"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving employee SSN for payroll or HR verification workflows","Programmatic access to sensitive employee identifiers behind a paywall","Agent-driven identity verification requiring SSN data"],"bestFor":["Automated HR or payroll systems needing on-demand SSN retrieval","AI agents that can settle x402 USDC payments on Base","Low-volume, pay-per-use access to sensitive employee records"],"notFor":["Bulk SSN lookups (no documented batch endpoint)","Users without a Base-compatible USDC wallet","Applications requiring detailed API documentation or OpenAPI specs (docs are sparse)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:15.875Z"},"updatedAt":"2026-04-24T17:34:04.324Z"}}