Tollbooth
https://x402toll.com/.well-known/x402.json Our Verdict
A human read this entry. That is the one thing true of everything on the list. Beyond that: the endpoint answered an x402 request when we knocked it, on the date shown. That date is the claim — not a word, a date. None of it is a delivery test. We have not paid for this and graded what came back, so read it as "we checked what is stated above," never as "this is worth the money."
56 financial, tax, and legal calculators for AI agents (income tax, self-employment/estimated tax, capital gains, LLC/entity comparison, mortgage/loan, retirement/RMD/Social Security, crypto/DeFi, sales tax). Each response includes its 2026 IRS/SSA source, a formula trace, and a reproducible SHA-256 hash, plus a free golden-vector self-check endpoint. $0.02-$1.00 USDC on Base. MCP: `npx tollbooth-x402`. ([OpenAPI](https://x402toll.com/v1/openapi.json))
Rater Grades
No independent rater grade published for this entry yet. What we publish is above: who read it, and whether its endpoint answered on a date we can show. Neither is a measurement of what it returns after payment.
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