Tollbooth X402 MCP server

Read from the package source without running it. The installed server may list more.

• tollbooth_catalog

  List every Tollbooth paid endpoint at x402toll.com — verified calculators for tax, crypto/DeFi, lending, real estate, retirement, and business — with x402 prices, input schemas, methods, and golden-vector evidence. Free.

• tollbooth_golden

  Free verifiability check: returns a tool's published golden vector — for most tools, machine-checkable {sampleInputs, expectedResult, expectedResponseHash}. POST the sampleInputs to the paid endpoint and confirm the result + hash match to verify our math without trusting us.

• tollbooth_gvp_check

  Neutral Golden-Vector Provenance check for ANY service's answer (not just Tollbooth's). Pass a GVP response object plus the inputs it was computed from; this recomputes the response's OWN sha256 over {endpoint, inputs, result, method, dataVintage} and reports whether it is self-consistent and GVP-1 complete (formula trace + data vintage + reproducible hash), with a "self-consistent · reproducible"

• tollbooth_how_to_paywrite action

  How an agent pays a Tollbooth endpoint with x402 (v2) on Base: the 402 flow, the PAYMENT-SIGNATURE header, and client library pointers. Free.

• tollbooth_preview

  Free coarse preview of a Tollbooth tool (rounded headline figure only; the paid endpoint returns the full verified breakdown). Previewable tools include paycheck, self-employment-tax, capital-gains-tax, mortgage-affordability, llc-cost, debt-plan, impermanent-loss.

• tollbooth_quote

  See the exact price AND the response shape BEFORE you pay. Give a tool id (e.g. "paycheck", see tollbooth_catalog) or a full paid path ("/v1/paycheck") and this decodes the endpoint's HTTP 402 x402 challenge — returning the amount in USDC atomic units + USD, asset, network, payTo, timeout, the resource URL, and (when discoverable) example input + paid-response shape. Nothing is spent. Call this fi

• tollbooth_recommend

  Given a plain-English need (e.g. "how much tax on my bonus", "required minimum distribution"), returns the Tollbooth tools most likely to answer it, ranked, with their x402 prices and URLs. Free.

• tollbooth_spec

  The open provenance standard Tollbooth implements and authors — the rules a verified-computation service follows so agents can trust and re-derive its answers. Free.

• tollbooth_verify

  Confirm or deny a claimed answer — from ANY source (another model, a spreadsheet, a competitor) — against Tollbooth's verified engine, for free. It returns ONLY whether the claim matches and which field NAMES were wrong; it NEVER reveals the correct value, so you can check a number you got elsewhere without getting the answer for free. Pass the same inputs the answer was computed from plus the cla

• tollbooth_verify_hash

  Free provenance check: re-derives the SHA-256 response hash of a previous Tollbooth paid response from its inputs and reports whether it matches (detects tampering).

• Code scan2 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancelast push 74 days ago12/15
• Maintainer identityregistry namespace matches repository owner6/10

Safety score

85/100

higher than 80% of 1,761 Finance servers

Tools

10

the typical Finance server has 8

Tools that change things

10%

typical: 0%. Fewer write tools means less an agent can break

Downloads a week

40

more than 34% of 421 Finance servers with a package

Tollbooth X402: common questions

Is Tollbooth X402 MCP server safe?

Yes, by our scan: it is graded A (85/100). Read the Tollbooth X402 safety report

How do I install Tollbooth X402?

It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.

Does Tollbooth X402 need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Tollbooth X402 maintained?

The last commit was 113 days ago (2026-07-13). The latest release is v0.6.0.

What can I use instead of Tollbooth X402?

Servers from other publishers that do the same job: Blockrun MCP server, Agent402.Tools: pay-per-call web tools MCP server and three.ws Agent Payments MCP server.

How does Tollbooth X402 compare with other Finance MCP servers?

safety score 85/100 (higher than 80% of 1,761 Finance servers); tools 10 (the typical Finance server has 8); tools that change things 10% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.