ToolVet
78trust / 100

Key Convert

by nostr.halowerk.com in Documents & files

x402 APIPassing, checked 19 min ago

Takes any public NIP-19 identifier or a 64-character hex value and returns every representation it can be expressed as. A decoded nprofile or nevent yields not only the key or event id but also the relay hints, the author and the kind that the TLV form carries — precisely the fields that make a follow-up query targeted, and precisely what is lost by code that only handles npub.

POST https://nostr.halowerk.com/key-convert

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
129 ms typical, 192 ms slowest 5%
Last check
19 min ago
Next check
in 9 min

How to call it

POST https://nostr.halowerk.com/key-convert

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://nostr.halowerk.com/key-convert
content-type: application/json

{
  "input": "beispiel"
}

Parameters

ParameterTypeRequiredDescription
assumestringNoHow to read bare hex. Ignored for bech32 input, which is unambiguous. One of: pubkey, event_id, both. Default: "both".
authorstringNoAuthor public key as hex or npub, for building an nevent or naddr.
identifierstringNoThe d tag value for building an naddr. Requires author and kind.
inputstringYesnpub, note, nprofile, nevent, naddr, or 64 hex characters.
kindintegerNoEvent kind for the generated nevent or naddr.
relaysarray of stringNowss relay hints to embed in the generated nprofile, nevent or naddr.

Example response

The listing has no example response.

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://nostr.halowerk.com/key-convert' \
  -H 'content-type: application/json' \
  --data-raw '{"input":"beispiel"}'

# 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://nostr.halowerk.com/key-convert' \
  -H 'content-type: application/json' \
  --data-raw '{"input":"beispiel"}' \
  | 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%2Fnostr.halowerk.com%2Fkey-convert&method=POST
const res = await pay("https://nostr.halowerk.com/key-convert", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "input": "beispiel"
  }),
});
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://nostr.halowerk.com/key-convert",
        json={
            "input": "beispiel",
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

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19 min agoPassed402108 ms$0.001
4 h agoPassed402138 ms$0.001
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