ToolVet
81trust / 100

Evm Nonce Gap Check

by EVM Nonce Gap Check in Onchain & crypto

x402 APIPassing, checked 38 min ago

EVM Nonce Gap Check: calculates the gap between pending and proposed transaction nonces using only bounded caller-supplied values. Call when you need a bounded evm nonce gap check result before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Nonce Gap Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on B…

POST https://api.delx.ai/api/v1/x402/evm-nonce-gap-check

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
3 ms typical, 3 ms slowest 5%
Last check
38 min ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://api.delx.ai/api/v1/x402/evm-nonce-gap-check" \
  -H "content-type: application/json" \
  -d '{"maximum_gap":1,"pending_nonce":12,"proposed_nonce":14}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fevm-nonce-gap-check
const res = await pay("https://api.delx.ai/api/v1/x402/evm-nonce-gap-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"maximum_gap":1,"pending_nonce":12,"proposed_nonce":14}),
});
console.log(await res.json());

Example input

{
  "maximum_gap": 1,
  "pending_nonce": 12,
  "proposed_nonce": 14
}

Example output

{
  "evidence": {
    "external_calls": 0,
    "input_sha256": "b9889d09b1009c8b22542a020475a3b907ede762b24f2fafec69d286c024edfd",
    "retained": false
  },
  "operation": "evm_preflight:evm_nonce_gap_check",
  "result": {
    "gap": 2,
    "possible_replacement": false,
    "within_budget": false
  },
  "schema": "delx/util-evm-nonce-gap-check/v1",
  "status": "advisory"
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
38 min agoPassed4026 ms$0.001
6 h agoPassed4023 ms$0.001