{"id":"528f12fc-5037-43be-8e57-d425af203d11","shortId":"tgeQu8","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 (employee ID 98). It is part of a broader suite of x402-protocol APIs offered by the provider, all priced at $0.02 per request and settled in USDC on the Base network. The endpoint uses the x402 payment protocol: callers receive a 402 challenge and must include an X-PAYMENT header with a valid payment proof to access the resource.\n\nThe x402 challenge specifies an \"exact\" payment scheme with a maxAmountRequired of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json. The endpoint accepts POST requests and is marked as discoverable.\n\nThe provider's landing page advertises a wide catalog of APIs spanning data/analytics, AI/ML, finance/Web3, and infrastructure utilities, all at the same $0.02 per-request price point with no API keys, no rate limits, and instant access. However, documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no substantive content, so there is no schema documentation for request bodies or response shapes beyond what the x402 challenge provides.","tags":[],"capabilities":["x402-payment","employee-ssn-lookup","usdc-base-settlement","per-request-micropayment","json-response"],"categories":["data","identity"],"synonyms":["employee SSN API","social security number lookup","employee data endpoint","x402 paid API","micropayment data access","PII retrieval API"],"warnings":["Endpoint returns sensitive PII (Social Security Numbers) — ensure compliance with applicable privacy and data protection regulations before use.","No request body schema or response schema documented; callers must discover the format experimentally.","All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no content.","The endpoint is for a single hardcoded employee ID (98); unclear if other IDs are supported or how to discover them.","No information on data provenance or whether this is real or synthetic/demo data."],"endpointUrl":"https://lowpaymentfee.com/api/v1/employees/98/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/98/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 documentation for request body schema or response shape, no OpenAPI spec, and the docs/pricing/README pages are empty. The endpoint deals with highly sensitive PII (SSN) with no visible access controls beyond payment, which is a significant 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'000':120 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':141 '0x8335':125 '20':119 '300':144 '402':88 '6':134 '98':47 'PII retrieval API' 'accept':155 'access':104,200 'address':140 'advertis':168 'ai/ml':176 'api':59,173,193 'application/json':152 'base':9,23,76,121,127 'beyond':229 'bodi':225 'broader':53 'caller':85 'catalog':171 'challeng':89,109,233 'connect':210 'content':216 'data':4,18,39 'data/analytics':175 'decim':135 'discover':162 'doc':204 'document':202,222 'employe':2,16,34,43,45 'employee SSN API' 'employee data endpoint' 'employee-ssn-lookup' 'endpoint':30,79,154 'equal':129 'exact':112 'finance/web3':177 'given':131 'header':97 'howev':201 'id':46 'includ':92 'infrastructur':179 'instant':199 'json-response' 'key':194 'land':166 'limit':197 'lowpaymentfee.com':32 'mark':160 'maxamountrequir':117 'micropay':7,21 'micropayment data access' 'mime':149 'must':91 'network':10,24,77 'number':37 'offer':60 'page':167,203 'part':50 'payment':83,96,101,113,136 'per':13,27,68,187 'per-request':186 'per-request-micropayment' 'point':190 'post':156 'price':65,189,205 'prompt':212 'proof':102 'protocol':58,84 'provid':63,164,234 'rate':196 'readm':206 'receiv':86 'record':44 'request':14,28,69,157,188,224 'resourc':106 'respons':148,227 'retriev':1,15 'return':33,207 'schema':221 'scheme':114 'second':145 'secur':36 'sent':138 'settl':71 'shape':228 'social':35 'social security number lookup' 'span':174 'specif':42 'specifi':110 'ssn':3,17,38 'substant':215 'suit':54 'timeout':146 'type':150 'unit':122 'usdc':73,124,132 'usdc-base-settlement' 'use':80 'util':180 'valid':100 'via':5,19 'wallet':211 'wide':170 'x':95 'x-payment':94 'x402':6,20,57,82,108,232 'x402 paid API' 'x402-payment' 'x402-protocol':56","prices":[{"id":"c1facab0-f558-4141-ae3e-6b5d989e4f80","listingId":"528f12fc-5037-43be-8e57-d425af203d11","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/98/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":"2026-04-21T18:32:18.079Z"}],"sources":[{"listingId":"528f12fc-5037-43be-8e57-d425af203d11","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/employees/98/ssn","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:18.079Z","lastSeenAt":"2026-04-24T04:04:41.834Z"}],"details":{"listingId":"528f12fc-5037-43be-8e57-d425af203d11","quickStartSnippet":"# 1. Probe the endpoint to get the 402 challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/employees/98/ssn\n# 2. Construct an X-PAYMENT header per x402 spec (exact scheme, USDC on Base)\n# 3. Re-send with payment proof:\ncurl -X POST https://lowpaymentfee.com/api/v1/employees/98/ssn \\\n  -H \"X-PAYMENT: <payment-proof>\"","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/98/ssn"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/employees/98/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":"Payment timeout is 300 seconds, payTo address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/employees/98/ssn"}],"useCases":["Programmatic retrieval of employee SSN for payroll or HR integrations","Agent-driven identity verification workflows requiring SSN data","Automated compliance checks that need SSN on demand"],"bestFor":["Agents or services that need on-demand SSN data without API key management","x402-compatible clients settling micropayments in USDC on Base","Low-volume, pay-per-use access to sensitive employee records"],"notFor":["Bulk data exports of many employee records (single-employee endpoint)","Users who cannot settle USDC payments on the Base network","Use cases where handling SSN data would violate privacy regulations"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:12.693Z"},"updatedAt":"2026-04-24T04:04:41.834Z"}}