{"id":"0545cdba-4f0f-459d-a3a8-758f57005d25","shortId":"JBdc3R","kind":"x402","title":"W-2 tax data API for 2022, pay-per-request via x402 on Base network using USDC.","tagline":"W-2 tax data API for 2022, pay-per-request via x402 on Base network using USDC.","description":"This endpoint at lowpaymentfee.com provides access to W-2 tax data for the 2022 tax year. It is part of a broader platform offering various pay-per-request APIs across data analytics, AI/ML, finance, and infrastructure categories. The endpoint accepts POST requests and is gated by the x402 payment protocol, settling on the Base network in USDC.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The platform advertises instant access with no minimums.\n\nDocumentation is extremely sparse. The specific input schema for the W-2 2022 tax endpoint is not documented in the crawled material, and the docs, API, pricing, and README pages all resolve to a wallet-connect prompt with no additional content. The exact fields expected in the POST body and the structure of the response are unknown from available sources.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","tax-data","w2-2022","pay-per-request","no-api-key"],"categories":["finance","tax"],"synonyms":["W-2 tax form","2022 tax data","wage and tax statement","IRS W2","tax calculation API","payroll tax","income tax API"],"warnings":["No documentation available for the W-2 2022 endpoint's input or output schema","All doc/pricing/README pages resolve to a wallet-connect prompt with no content","It is unclear what data this endpoint actually returns or what POST body it expects","Tax data APIs may be subject to regulatory requirements depending on jurisdiction"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tax/w2/2022","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/tax/w2/2022","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/request in USDC on Base). However, there is no documentation of the request/response schema for this specific tax endpoint, no OpenAPI spec, and the docs pages are empty. The actual functionality and data returned are entirely 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'0.02':97 '000':101 '20':100 '2022':7,25,50,152 '2022 tax data' '6':107 'IRS W2' 'W-2 tax form' 'accept':77 'access':42,136 'across':67 'addit':180 'advertis':134 'ai/ml':70 'analyt':69 'api':5,23,66,110,165 'attach':120 'avail':199 'base':15,33,91,102 'base-network' 'bodi':189 'broader':58 'caller':118 'categori':74 'commit':115 'connect':176 'content':181 'crawl':160 'data':4,22,47,68 'decim':108 'doc':164 'document':140,157 'endpoint':38,76,154 'exact':183 'expect':185 'extrem':142 'field':184 'financ':71 'gate':82 'header':125 'income tax API' 'infrastructur':73 'input':146 'instant':135 'key':111 'limit':113 'lowpaymentfee.com':40 'materi':161 'minimum':139 'network':16,34,92 'no-api-key' 'offer':60 'page':169 'part':55 'pay':9,27,63 'pay-per-request':8,26,62 'payment':86,124,130 'payroll tax' 'per':10,28,64,98 'platform':59,133 'post':78,188 'price':95,166 'prompt':177 'proof':131 'protocol':87 'provid':41 'rate':112 'readm':168 'request':11,29,65,79,99 'requir':117 'resolv':171 'respons':195 'schema':147 'settl':88 'simpli':119 'sourc':200 'spars':143 'specif':145 'structur':192 'tax':3,21,46,51,153 'tax calculation API' 'tax-data' 'unit':103 'unknown':197 'usdc':18,36,94,105 'usdc-settlement' 'use':17,35 'valid':128 'various':61 'via':12,30 'w':1,19,44,150 'w2-2022' 'wage and tax statement' 'wallet':175 'wallet-connect':174 'x':123 'x-payment':122 'x402':13,31,85,129 'x402-payment' 'year':52","prices":[{"id":"c9d997f1-c683-4ac2-b20e-c6f019182ce7","listingId":"0545cdba-4f0f-459d-a3a8-758f57005d25","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/tax/w2/2022","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:59.665Z"}],"sources":[{"listingId":"0545cdba-4f0f-459d-a3a8-758f57005d25","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tax/w2/2022","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:59.665Z","lastSeenAt":"2026-04-26T15:33:15.264Z"}],"details":{"listingId":"0545cdba-4f0f-459d-a3a8-758f57005d25","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tax/w2/2022 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/tax/w2/2022"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/tax/w2/2022"}],"useCases":["Retrieving W-2 tax information for the 2022 tax year","Automating tax form data lookups in financial applications","Integrating 2022 wage/tax data into accounting workflows"],"bestFor":["Developers needing on-demand W-2 2022 tax data without subscription commitments","Agents that can pay per-call via x402 on Base","Applications requiring programmatic access to tax form information"],"notFor":["Users who need bulk historical tax data across many years at volume discounts","Anyone without access to USDC on Base network for payment","Use cases requiring detailed documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.095Z"},"updatedAt":"2026-04-26T15:33:15.264Z"}}