Tollbooth

{
  "url": "https://x402toll.com",
  "name": "Tollbooth",
  "type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1",
  "image": "https://x402toll.com/favicon.ico",
  "payments": {
    "asset": "USDC",
    "network": "eip155:8453",
    "protocol": "x402"
  },
  "services": [
    {
      "url": "https://x402toll.com/v1/catalog",
      "name": "catalog",
      "type": "http"
    },
    {
      "url": "https://x402toll.com/v1/openapi.json",
      "name": "openapi",
      "type": "http"
    },
    {
      "url": "https://x402toll.com/.well-known/agent-card.json",
      "name": "agent-card",
      "type": "a2a"
    },
    {
      "url": "https://x402toll.com/.well-known/x402.json",
      "name": "x402-manifest",
      "type": "x402"
    },
    {
      "url": "https://x402toll.com/v1/golden/:id",
      "name": "golden-self-check",
      "type": "http"
    },
    {
      "url": "https://x402toll.com/v1/verify",
      "name": "verify-claim",
      "type": "http"
    },
    {
      "url": "https://x402toll.com/v1/spec",
      "name": "provenance-spec",
      "type": "http"
    }
  ],
  "description": "56 verified pay-per-call financial, tax, and legal calculators for AI agents. Every answer ships a formula trace, its 2026 source, and a reproducible SHA-256 hash the agent can re-derive for free — trustless verification, not \"trust my signature\".",
  "registrations": [
    {
      "agentId": null,
      "chainId": 8453,
      "registry": null
    }
  ],
  "supportedTrust": [
    {
      "name": "Golden-Vector Provenance",
      "spec": "https://x402toll.com/v1/spec",
      "type": "reproducible-provenance",
      "description": "Every answer carries a formula trace, versioned 2026 source citations, and a deterministic SHA-256 hash over {endpoint, inputs, result, method, dataVintage}. A free golden-vector endpoint lets any verifier recompute the canonical answer + hash and confirm correctness without trusting or paying the server."
    }
  ]
}