ToolVet
77trust / 100

Anchor

by Anchor in Onchain & crypto

x402 APIPassing, checked 4 h ago

Anchor a 32-byte hash to Base + Solana mainnet — $0.005 USDC

POST
https://api.anchor-x402.com/v1/anchor
Price
$0.005
per call in USDC
Uptime
97.1%
last 30 days
Response time
631 ms
770 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

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

How to call it

POST https://api.anchor-x402.com/v1/anchor

Each call costs $0.005 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://api.anchor-x402.com/v1/anchor
content-type: application/json

{
  "hash": "ab0898397c86fbf97c99c6f8b29e55ab697315705777ee1d106e2dcb9bd686b3",
  "note": "vendor approval batch 2026-Q2"
}

Parameters

ParameterTypeRequiredDescription
dataanyNoArbitrary JSON to be canonicalized + SHA-256'd by the server. Mutually exclusive with `hash`.
hashstringNo32-byte hex hash (64 chars, no 0x prefix). Mutually exclusive with `data`.
notestringNoOptional 200-char note returned in the response (not on-chain).

Example response

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

{
  "anchored_at": 1746820000,
  "base": {
    "explorer_url": "https://basescan.org/tx/0x7fb4d107d8c1b65b33851434c6fd178b682a143904a2bfa89ff2c1fa70974e96",
    "tx": "0x7fb4d107d8c1b65b33851434c6fd178b682a143904a2bfa89ff2c1fa70974e96"
  },
  "merkle_root": "ab0898397c86fbf97c99c6f8b29e55ab697315705777ee1d106e2dcb9bd686b3",
  "solana": {
    "explorer_url": "https://solscan.io/tx/u8rqU4oSQkkHQw93nCCtQym5crh4UjuoNvYhspLcUTEny59asrNNffpmxpgzRuZ4MXQnN5UEoCKQuDS16ZMPKW2",
    "tx": "u8rqU4oSQkkHQw93nCCtQym5crh4UjuoNvYhspLcUTEny59asrNNffpmxpgzRuZ4MXQnN5UEoCKQuDS16ZMPKW2"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.anchor-x402.com/v1/anchor' \
  -H 'content-type: application/json' \
  --data-raw '{"hash":"ab0898397c86fbf97c99c6f8b29e55ab697315705777ee1d106e2dcb9bd686b3","note":"vendor approval batch 2026-Q2"}'

# 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://api.anchor-x402.com/v1/anchor' \
  -H 'content-type: application/json' \
  --data-raw '{"hash":"ab0898397c86fbf97c99c6f8b29e55ab697315705777ee1d106e2dcb9bd686b3","note":"vendor approval batch 2026-Q2"}' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.anchor-x402.com%2Fv1%2Fanchor&method=POST
const res = await pay("https://api.anchor-x402.com/v1/anchor", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "hash": "ab0898397c86fbf97c99c6f8b29e55ab697315705777ee1d106e2dcb9bd686b3",
    "note": "vendor approval batch 2026-Q2"
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.anchor-x402.com/v1/anchor",
        json={
            "hash": "ab0898397c86fbf97c99c6f8b29e55ab697315705777ee1d106e2dcb9bd686b3",
            "note": "vendor approval batch 2026-Q2",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402571 ms$0.005
8 h agoPassed402655 ms$0.005
13 h agoPassed402605 ms$0.005
18 h agoPassed402545 ms$0.005
23 h agoPassed402653 ms$0.005
Show 10 older checks
27 h agoPassed402575 ms$0.005
32 h agoPassed402610 ms$0.005
36 h agoPassed402620 ms$0.005
40 h agoPassed402648 ms$0.005
44 h agoPassed402684 ms$0.005
2 days agoPassed402715 ms$0.005
2 days agoPassed402687 ms$0.005
2 days agoPassed402618 ms$0.005
3 days agoPassed402624 ms$0.005
3 days agoPassed402744 ms$0.005