US 2024 tax return data via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides access to 2024 US tax return data through the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per request. The platform emphasizes simplicity: no subscriptions, no minimums, and instant access via the x402 protocol on the Base L2 network.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what fields the tax returns endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data content and required POST body are unknown.
Capabilities
Use cases
- —Retrieving 2024 US tax return data programmatically
- —Integrating tax data into financial analysis workflows
- —Agent-driven tax document retrieval with per-call micropayments
Fit
Best for
- —Developers needing on-demand tax return data without subscription commitments
- —AI agents that can settle x402 payments on Base
- —Low-volume or sporadic tax data lookups at $0.02 per call
Not for
- —Users who need detailed API documentation or schema before integrating
- —Bulk tax data retrieval where per-call pricing may add up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tax/returns/2024 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts USDC on Base. However, there is zero documentation on request format, response schema, or what tax data is actually returned. The docs/pricing/README pages are all blank beyond a wallet connect prompt. Without any schema, examples, or substantive documentation, this is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI schema or request/response examples provided.
- —The nature of the tax return data (scope, fields, source) is completely undocumented.
- —It is unclear whether this endpoint returns real IRS data, synthetic data, or something else entirely.
- —Tax data may be subject to regulatory requirements (e.g., IRS data handling, PII protections) that are not addressed anywhere on the site.
Citations
- —Endpoint returns a valid x402 402 challenge with USDC on Base networkhttps://lowpaymentfee.com/api/v1/tax/returns/2024
- —Price is $0.02 per request across all APIs on the platformhttps://lowpaymentfee.com
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/tax/returns/2024
- —No API keys, no rate limits, instant access advertisedhttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages render only 'Connect wallet'https://lowpaymentfee.com/docs