IRS Internal Revenue Bulletin API
Verbatim IRS Revenue Rulings, Procedures, Notices & Treasury Decisions since 2003. Free search over 6,300+ docs; $0.01/doc via x402 on Base.
1 of 6 routes settlement-verified · $0.01 USDC/request · 6 endpoints · Data · base network · x402 protocol
Verified routes
GET /doc/{id}/full· $0.01 · 2026-09-07 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpHow to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
By Levi Painter