ToolVet
78trust / 100

Email Reply

by SiteCheck in Email & messaging

x402 APIPassing, checked 2 h ago

Drafts a reply (subject and body) to a received e-mail (max 10,000 characters) for an intent: accept, decline, ask-information, follow-up or custom with your own instructions. Tone formal, neutral or friendly; language as requested. Dates, numbers and names that are not in the inputs appear as placeholders such as [date]. Read it before sending.

POST
https://api.sitecheck-api.workers.dev/api/email/reply
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
35 ms
35 ms slowest 5%
Last check
Passed
2 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.sitecheck-api.workers.dev/api/email/reply

Each call costs $0.002 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.sitecheck-api.workers.dev/api/email/reply
content-type: application/json

{
  "email": "Hi, could you confirm if you can attend the review meeting on Thursday at 10?",
  "intent": "accept",
  "language": "en",
  "tone": "friendly"
}

Parameters

ParameterTypeRequiredDescription
emailstringYesThe e-mail you received (max 10,000 characters)
instructionsstringNoYour own instructions (max 500 characters), required for intent custom
intentstringYesaccept, decline, ask-information, follow-up or custom
languagestringNoLanguage code or name of the reply, default en
tonestringNoformal, neutral (default) or friendly

Example response

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

{
  "body": "Hi, yes, I can attend the review meeting on Thursday at 10. I'm looking forward to it.",
  "checkedAt": "2026-10-15T18:21:19.057Z",
  "intent": "accept",
  "language": "en",
  "note": "Draft only: check every placeholder and fact before sending.",
  "subject": "Re: Review Meeting on Thursday",
  "tone": "friendly"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.sitecheck-api.workers.dev/api/email/reply' \
  -H 'content-type: application/json' \
  --data-raw '{"email":"Hi, could you confirm if you can attend the review meeting on Thursday at 10?","intent":"accept","language":"en","tone":"friendly"}'

# 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.sitecheck-api.workers.dev/api/email/reply' \
  -H 'content-type: application/json' \
  --data-raw '{"email":"Hi, could you confirm if you can attend the review meeting on Thursday at 10?","intent":"accept","language":"en","tone":"friendly"}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Femail%2Freply&method=POST
const res = await pay("https://api.sitecheck-api.workers.dev/api/email/reply", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "email": "Hi, could you confirm if you can attend the review meeting on Thursday at 10?",
    "intent": "accept",
    "language": "en",
    "tone": "friendly"
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
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.sitecheck-api.workers.dev/api/email/reply",
        json={
            "email": "Hi, could you confirm if you can attend the review meeting on Thursday at 10?",
            "intent": "accept",
            "language": "en",
            "tone": "friendly",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed40235 ms$0.002