{"id":"d161dd10-271e-438f-9511-ce22ecb29c0f","shortId":"qYtUPA","kind":"x402","title":"Pay-per-call employee data API on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call employee data API on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to employee data (specifically employee record #137) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nThe provider lowpaymentfee.com hosts a broader catalog of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payments are handled entirely through the x402 protocol on the Base L2 network.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The specific data returned by the /api/v1/employees/137 endpoint is unknown beyond the fact that it serves application/json. The endpoint is confirmed live (returns a valid 402 challenge).","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","employee-data","json-api","pay-per-call","no-api-key"],"categories":["data"],"synonyms":["employee API","employee record lookup","paid data endpoint","x402 API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'","No OpenAPI or schema definition; request body format and response structure are unknown","The purpose and content of the /api/v1/employees/137 endpoint is undocumented — it is unclear what employee data is returned or whether this is sample/demo data","No robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/employees/137","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/137","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the actual data returned by this employee endpoint is completely undocumented. This is effectively a stub 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'/api/v1/employees/137':206 '/docs':168 '/pricing':169 '/readme':172 '/request':17,34 '0.02':16,33,83,136 '000':78 '0x8335':70 '137':47 '20':77 '2913':71 '402':225 '6':88 'Base network API' 'USDC micropayment API' 'accept':54 'access':40 'ai/ml':106 'analysi':109 'analyt':105 'api':7,24,102,141 'application/json':216 'avail':199 'base':9,26,65,79,160 'base-network' 'beyond':210 'broader':95 'call':4,21,101 'catalog':96 'challeng':226 'classif':111 'commit':149 'confirm':220 'connect':178 'contract':69 'convers':128 'cost':75 'data':6,23,43,104,202 'decim':89 'detail':185 'document':163,194 'embed':112 'employe':5,22,42,45 'employee API' 'employee record lookup' 'employee-data' 'endpoint':36,131,207,218 'entir':153 'equal':82 'estim':122 'exampl':197 'exchang':117 'extrem':165 'fact':212 'feed':116 'financ':113 'gas':121 'generat':129 'geocod':126 'handl':152 'host':93 'infer':107 'infrastructur':124 'json':59 'json-api' 'key':142 'l2':161 'limit':145 'live':221 'lowpaymentfee' 'lowpaymentfee.com':38,92 'maximum':74 'minimum':148 'network':66,162 'no-api-key' 'openapi':189 'page':173 'paid data endpoint' 'pay':2,19,99 'pay-per-cal':1,18,98 'pay-per-call' 'payload':198 'payment':51,60,150 'per':3,20,84,100,137 'post':55 'price':115,133 'prompt':180 'protocol':52,157 'provid':39,91 'quot':120 'rate':118,144 'record':46 'render':175 'request':56,85,138 'request/response':192 'return':58,203,222 'schema':193 'sentiment':108 'serv':215 'settl':12,29,62 'span':103 'spars':166 'spec':190 'specif':44,201 'summar':110 'technic':184 'token':119 'uniform':134 'unit':80 'unknown':209 'usdc':14,31,68,86 'usdc-settlement' 'use':67,87 'util':125 'valid':127,224 'via':10,27,48 'wallet':179 'web3':114 'x402':11,28,50,156 'x402 API' 'x402-payment'","prices":[{"id":"3a54a645-c5b8-4896-aa6b-c00e07eded18","listingId":"d161dd10-271e-438f-9511-ce22ecb29c0f","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/137","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:14.303Z"}],"sources":[{"listingId":"d161dd10-271e-438f-9511-ce22ecb29c0f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/employees/137","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:14.303Z","lastSeenAt":"2026-04-25T04:03:57.604Z"}],"details":{"listingId":"d161dd10-271e-438f-9511-ce22ecb29c0f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/employees/137 \\\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":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/employees/137"},{"claim":"All endpoints 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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/employees/137"}],"useCases":["Retrieving employee record data on a per-call payment basis","Demonstrating x402 payment protocol integration for data APIs","Agent-driven data retrieval with automatic crypto micropayments"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need on-demand employee data without API key management","Low-volume, pay-as-you-go data access on Base"],"notFor":["Bulk employee data retrieval (no documented batch endpoints)","Users who need detailed API documentation or response schema guarantees","Non-crypto users who cannot settle payments on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:18.158Z"},"updatedAt":"2026-04-25T04:03:57.604Z"}}