ToolVet
80trust / 100

Transfer Encoding Check

by Transfer Encoding Check in Onchain & crypto

x402 APIPassing, checked 24 min ago

Transfer Encoding Check: checks transfer-coding order and whether chunked appears only last using only bounded caller-supplied values. Call when you need a bounded transfer encoding check result before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Transfer Encoding Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. First-party, stat…

POST
https://api.delx.ai/api/v1/x402/transfer-encoding-check
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
10 ms
633 ms slowest 5%
Last check
Passed
24 min ago, next in 9 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

POST https://api.delx.ai/api/v1/x402/transfer-encoding-check

Each call costs $0.001 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.delx.ai/api/v1/x402/transfer-encoding-check
content-type: application/json

{
  "header": "gzip, chunked"
}

Parameters

ParameterTypeRequiredDescription
headerstringYesHeader supplied to Transfer Encoding Check; used only for this bounded calculation and processed in memory without retention.

Example response

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

{
  "evidence": {
    "external_calls": 0,
    "input_sha256": "d6676b1fa151e91d9e82973a7a1385d55e325258b6e169eb78e0b287fb421903",
    "retained": false
  },
  "operation": "web_reliability:transfer_encoding_check",
  "result": {
    "chunked_last": true,
    "codings": [
      "gzip",
      "chunked"
    ]
  },
  "schema": "delx/util-transfer-encoding-check/v1",
  "status": "pass"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.delx.ai/api/v1/x402/transfer-encoding-check' \
  -H 'content-type: application/json' \
  --data-raw '{"header":"gzip, chunked"}'

# 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.delx.ai/api/v1/x402/transfer-encoding-check' \
  -H 'content-type: application/json' \
  --data-raw '{"header":"gzip, chunked"}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Ftransfer-encoding-check&method=POST
const res = await pay("https://api.delx.ai/api/v1/x402/transfer-encoding-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "header": "gzip, chunked"
  }),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
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.delx.ai/api/v1/x402/transfer-encoding-check",
        json={
            "header": "gzip, chunked",
        },
    )
    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
24 min agoPassed40210 ms$0.001
4 h agoPassed40223 ms$0.001
9 h agoPassed40210 ms$0.001
13 h agoPassed40211 ms$0.001
17 h agoPassed40254 ms$0.001
Show 10 older checks
21 h agoPassed40236 ms$0.001
26 h agoPassed4026 ms$0.001
30 h agoPassed4022.8 s$0.001
34 h agoPassed40245 ms$0.001
38 h agoPassed4028 ms$0.001
42 h agoPassed402633 ms$0.001
46 h agoPassed40242 ms$0.001
2 days agoPassed4029 ms$0.001
2 days agoPassed4027 ms$0.001
2 days agoPassed40214 ms$0.001