ToolVet
68trust / 100

Claims

by Tereno Claim Publication in Onchain & crypto

x402 APIPassing, checked 2 h ago

Publish a deterministic claim about a Base proxy and let the market try to break it. You assert that a contract's implementation slot held one address across a block range, fund a reward for whoever finds a block where it did not, and Tereno writes the claim onchain and adjudicates counterexamples by historical storage reads. If nobody collects before your deadline, you get a reproducible survival receipt: not an audit, but proof the claim stood in public with money on it.

POST
https://www.tereno.xyz/api/v1/claims
Price
$0.25
per call in USDC
Uptime
100%
last 30 days
Response time
1.3 s
1.5 s slowest 5%
Last check
Passed
2 h ago, next in 4 h

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://www.tereno.xyz/api/v1/claims

Each call costs $0.25 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://www.tereno.xyz/api/v1/claims
content-type: application/json

{
  "address": "0x1111111111111111111111111111111111111111",
  "claimType": "contract.upgrade.window.claim",
  "deadlineHours": 72,
  "fromBlock": 20000000,
  "rewardUsd": 5,
  "toBlock": 20500000,
  "wallet": "0x2222222222222222222222222222222222222222"
}

Parameters

ParameterTypeRequiredDescription
addressstringYesBase proxy contract the assertion is about.
claimTypeanyNoThe only claim type whose survival is worth a receipt.
deadlineHoursintegerYesHow long the claim stays open to challenge, 1 to 720.
fromBlockintegerYesInclusive start of the window. The window must span 1000 to 2000000 blocks.
implementationstring or nullNoOptional. Defaults to whatever the implementation slot resolves to at toBlock.
rewardUsdnumberYesWhat you will pay the first wallet that falsifies your claim. Not escrowed by Tereno.
toBlockintegerYesInclusive end of the window. Must not be in the future.
walletstringYesThe opener wallet, which must sign the request.

Example response

The provider's example. We can't check it without paying.

{
  "breadcrumbStatus": "written",
  "claim": {
    "claimId": "0xabc",
    "claimType": "contract.upgrade.window.claim",
    "status": "open"
  },
  "pricing": {
    "currency": "USDC",
    "pricePaidUsd": 0.25
  },
  "receiptUrl": "/api/v1/claims/0xabc/receipt"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.25.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.tereno.xyz/api/v1/claims' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x1111111111111111111111111111111111111111","claimType":"contract.upgrade.window.claim","deadlineHours":72,"fromBlock":20000000,"rewardUsd":5,"toBlock":20500000,"wallet":"0x2222222222222222222222222222222222222222"}'

# 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://www.tereno.xyz/api/v1/claims' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x1111111111111111111111111111111111111111","claimType":"contract.upgrade.window.claim","deadlineHours":72,"fromBlock":20000000,"rewardUsd":5,"toBlock":20500000,"wallet":"0x2222222222222222222222222222222222222222"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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 $0.25 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.25" });
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 $0.25 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.tereno.xyz%2Fapi%2Fv1%2Fclaims&method=POST
const res = await pay("https://www.tereno.xyz/api/v1/claims", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0x1111111111111111111111111111111111111111",
    "claimType": "contract.upgrade.window.claim",
    "deadlineHours": 72,
    "fromBlock": 20000000,
    "rewardUsd": 5,
    "toBlock": 20500000,
    "wallet": "0x2222222222222222222222222222222222222222"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# 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 $0.25 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.25"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.tereno.xyz/api/v1/claims",
        json={
            "address": "0x1111111111111111111111111111111111111111",
            "claimType": "contract.upgrade.window.claim",
            "deadlineHours": 72,
            "fromBlock": 20000000,
            "rewardUsd": 5,
            "toBlock": 20500000,
            "wallet": "0x2222222222222222222222222222222222222222",
        },
    )
    print(res.status_code, res.text)

Security scan

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