Domain Host Trust

{
  "client_request_id": null,
  "commercial": {
    "pricing_version": "domain-host-trust-v1"
  },
  "decision": {
    "reasons": [
      "OBSERVATION_UNAVAILABLE"
    ],
    "state": "UNKNOWN"
  },
  "dns_resolution": {
    "addresses": [],
    "dnssec_state": "UNKNOWN_NOT_OBSERVED"
  },
  "freshness": {
    "max_age_seconds": 300,
    "observed_at": "2026-09-27T12:00:00.000Z",
    "state": "FRESH"
  },
  "hostname": "example.org",
  "http_security_headers": {
    "present": {},
    "state": "UNKNOWN"
  },
  "metering": {
    "billable": false,
    "quantity": 0,
    "unit": "domain_host_trust_record"
  },
  "observation_scope": {
    "full_paths_checked": false,
    "global_trust_assessed": false,
    "method": "HEAD",
    "path": "/",
    "port": 443,
    "protocol": "HTTPS",
    "redirects_followed": false
  },
  "observed_at": "2026-09-27T12:00:00.000Z",
  "product_id": "foundry.domain-host-trust-record.v1",
  "provenance": [],
  "request_id": "req_domain_synthetic_contract",
  "result_state": "UNKNOWN",
  "rights": {
    "state": "GREEN_SELF_OBSERVED_PROTOCOL_FACTS",
    "third_party_reputation_feed": false,
    "whois_bulk_content": false
  },
  "run_id": "run_domain_synthetic_contract",
  "schema_version": "1.0",
  "tls_certificate_validity": {
    "state": "UNKNOWN"
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://foundry-api-production-95ae.up.railway.app/v1/domain-host-trust' \
  -H 'content-type: application/json' \
  --data-raw '{"hostname":"example.org","schema_version":"1.0"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://foundry-api-production-95ae.up.railway.app/v1/domain-host-trust' \
  -H 'content-type: application/json' \
  --data-raw '{"hostname":"example.org","schema_version":"1.0"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffoundry-api-production-95ae.up.railway.app%2Fv1%2Fdomain-host-trust&method=POST
const res = await pay("https://foundry-api-production-95ae.up.railway.app/v1/domain-host-trust", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "hostname": "example.org",
    "schema_version": "1.0"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://foundry-api-production-95ae.up.railway.app/v1/domain-host-trust",
        json={
            "hostname": "example.org",
            "schema_version": "1.0",
        },
    )
    print(res.status_code, res.text)