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Webhook Verify
by Webhook signature verify in Security & trust
x402 APIPassing, checked 5 h ago
Verify a webhook's HMAC signature against the correct per-provider scheme: GitHub (X-Hub-Signature-256, sha256=hex), Stripe (Stripe-Signature t/v1 over "<t>.<body>" with replay tolerance), Shopify (X-Shopify-Hmac-Sha256, base64), Slack (X-Slack-Signature, v0:<ts>:<body> with replay tolerance). Constant-time comparison; the secret is never echoed. Pass the RAW request body string - signatures are over the raw bytes. Deterministic.
POST https://agent402.tools/api/webhook-verify
Last 30 days
All checks passedSome failedAll failedNot checked
- Uptime
- 100%
- Response time
- 192 ms typical, 192 ms slowest 5%
- Last check
- 5 h ago
- Next check
- any minute now
How to call it
# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/webhook-verify" \
-H "content-type: application/json" \
-d '{"payload":"{\"hello\":\"world\"}","provider":"github","secret":"it's a secret","signature":"sha256=8d4063f0a81aa1531d9891a028a68cf2bb537ecdf0e82557674d71e168d570f9"}'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%2Fagent402.tools%2Fapi%2Fwebhook-verify
const res = await pay("https://agent402.tools/api/webhook-verify", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({"payload":"{\"hello\":\"world\"}","provider":"github","secret":"it's a secret","signature":"sha256=8d4063f0a81aa1531d9891a028a68cf2bb537ecdf0e82557674d71e168d570f9"}),
});
console.log(await res.json());Example input
{
"payload": "{\"hello\":\"world\"}",
"provider": "github",
"secret": "it's a secret",
"signature": "sha256=8d4063f0a81aa1531d9891a028a68cf2bb537ecdf0e82557674d71e168d570f9"
}Example output
{
"provider": "github",
"reason": "signature matches the recomputed HMAC for this payload and secret",
"scheme": "X-Hub-Signature-256: sha256=hex(HMAC-SHA256(secret, rawBody))",
"valid": true
}Security scan
- No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 5 h ago | Passed | 402 | 192 ms | $0.001 |