ToolVet
80trust / 100

Bytes Hex Encode

by Delx Bytes Hex Encode in Onchain & crypto

x402 APIPassing, checked 24 min ago

Encode bounded UTF-8 text to hex or inspect hex byte length without RPC — call when encoding bounded UTF-8 to hex or inspecting hex length. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain…

POST
https://api.delx.ai/api/v1/x402/bytes-hex-encode
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
11 ms
51 ms slowest 5%
Last check
Passed
24 min ago, next in 4 min

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

POST https://api.delx.ai/api/v1/x402/bytes-hex-encode

Each call costs $0.003 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/bytes-hex-encode
content-type: application/json

{
  "text": "delx"
}

Parameters

ParameterTypeRequiredDescription
textstringNoUTF-8 text to encode, chunk, index, or analyze (caller-supplied only).

Example response

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

{
  "byte_length": 4,
  "hex": "0x64656c78",
  "mode": "text_to_hex",
  "schema": "delx/util-bytes-hex-encode/v1",
  "truncated": false,
  "valid": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

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/bytes-hex-encode' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"delx"}'

# 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/bytes-hex-encode' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"delx"}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fbytes-hex-encode&method=POST
const res = await pay("https://api.delx.ai/api/v1/x402/bytes-hex-encode", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "text": "delx"
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
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/bytes-hex-encode",
        json={
            "text": "delx",
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

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24 min agoPassed40212 ms$0.003
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9 h agoPassed40221 ms$0.003
13 h agoPassed40224 ms$0.003
17 h agoPassed40212 ms$0.003
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21 h agoPassed40211 ms$0.003
26 h agoPassed4027 ms$0.003
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2 days agoPassed40251 ms$0.003