W-2 tax data API for 2022, pay-per-request via x402 on Base network using USDC.
What it does
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.
Pricing 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.
Documentation 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.
Capabilities
Use cases
- —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
Fit
Best for
- —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
Not for
- —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
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tax/w2/2022 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>" \
-d '{}'Endpoint
Quality
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 unknown.
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
Citations
- —The endpoint returns a 402 challenge requesting 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/tax/w2/2022
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/tax/w2/2022