{"id":"24e31757-8861-4644-bed8-dc4e2df2acee","shortId":"vh3bxx","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 33) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with an exact-scheme challenge requiring up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals).\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of x402-gated APIs spanning data analytics, AI/ML inference, finance, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, the specific endpoint being listed here deals with sensitive personally identifiable information (an employee's SSN), which raises significant regulatory and ethical concerns. Documentation beyond the landing page is essentially empty (all subpages just show \"Connect wallet\"), so there is no schema documentation, no example responses, and no information about what fields the JSON response contains or what input the POST body expects.\n\nBecause the endpoint returned a well-formed 402 challenge, it is confirmed live. The x402 challenge specifies a 300-second payment timeout and targets payTo address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. No OpenAPI spec, no request/response schemas, and no usage examples are available from the crawl.","tags":[],"capabilities":["x402-payment","usdc-base","employee-data","ssn-lookup","json-response","per-request-micropayment"],"categories":["data","pii"],"synonyms":["social security number API","employee SSN lookup","PII endpoint","x402 employee data","Base USDC micropayment API","SSN retrieval"],"warnings":["This endpoint exposes Social Security Numbers — highly sensitive PII subject to strict regulations (CCPA, GDPR, HIPAA, state breach notification laws). Verify legal authorization before use.","No request body schema or response schema is documented anywhere.","All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' with no actual content.","The endpoint is hardcoded to employee ID 33; it is unclear whether other employee IDs are supported or how the broader API is structured.","No terms of service, privacy policy, or data handling documentation found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/employees/33/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/33/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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request/response schemas, no OpenAPI spec, and the docs/pricing/API pages are all blank. Additionally, the endpoint serves highly sensitive PII (SSN), which is a major regulatory red 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'000':81 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':219 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':70 '20':80 '300':211 '33':47 '402':200 '6':89 'Base USDC micropayment API' 'PII endpoint' 'SSN retrieval' 'accept':54 'address':218 'ai/ml':106 'analyt':105 'api':102,120 'avail':231 'base':9,23,65,82 'behind':48 'beyond':153 'bodi':190 'broad':96 'catalog':97 'challeng':76,201,208 'commit':127 'concern':151 'confirm':204 'connect':164 'contain':184 'contract':69 'crawl':234 'data':4,18,39,104 'deal':135 'decim':90 'document':152,171 'employe':2,16,34,43,45,142 'employee SSN lookup' 'employee-data' 'empti':159 'endpoint':30,53,131,194 'essenti':158 'ethic':150 'exact':74 'exact-schem':73 'exampl':173,229 'expect':191 'field':180 'financ':108 'form':199 'gate':101 'given':86 'host':94 'howev':128 'i.e':84 'id':46 'identifi':139 'infer':107 'inform':140,177 'input':187 'json':59,182 'json-response' 'key':121 'land':155 'limit':124 'list':133 'live':205 'lowpaymentfee.com':32,93 'micropay':7,21 'network':10,24,66 'number':37 'openapi':221 'page':156 'payment':60,213 'payto':217 'paywal':51 'per':13,27,116 'per-request-micropayment' 'person':138 'post':55,189 'price':113 'provid':92 'rais':146 'rate':123 'record':44 'regulatori':148 'request':14,28,56,117 'request/response':224 'requir':77 'respons':174,183 'retriev':1,15 'return':33,58,195 'schema':170,225 'scheme':75 'second':212 'secur':36 'sensit':137 'servic':111 'settl':62 'show':163 'signific':147 'social':35 'social security number API' 'span':103 'spec':222 'specif':42,130 'specifi':209 'ssn':3,17,38,144 'ssn-lookup' 'subpag':161 'target':216 'timeout':214 'unit':83 'usag':228 'usdc':68,87 'usdc-base' 'use':67 'util':110 'via':5,19 'wallet':165 'well':198 'well-form':197 'x402':6,20,50,100,207 'x402 employee data' 'x402-gated':99 'x402-payment'","prices":[{"id":"2cebe5ec-5a12-4cbe-af25-fc1db605106d","listingId":"24e31757-8861-4644-bed8-dc4e2df2acee","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/33/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":"2026-04-21T18:32:16.457Z"}],"sources":[{"listingId":"24e31757-8861-4644-bed8-dc4e2df2acee","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/employees/33/ssn","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:16.457Z","lastSeenAt":"2026-04-24T14:34:02.564Z"}],"details":{"listingId":"24e31757-8861-4644-bed8-dc4e2df2acee","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/employees/33/ssn \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/employees/33/ssn"},{"claim":"All APIs 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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/employees/33/ssn"}],"useCases":["Retrieving SSN for a specific employee record behind a paywall","Programmatic access to sensitive employee data for authorized HR systems","Demonstrating x402 micropayment protocol for data access"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Authorized systems needing on-demand employee PII retrieval","Agents that can settle USDC micropayments on Base"],"notFor":["Unauthorized access to personally identifiable information","Production use without verifying legal compliance (GDPR, CCPA, etc.)","Users who need detailed API documentation or schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:15.174Z"},"updatedAt":"2026-04-24T14:34:02.564Z"}}