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Nostr Decode

by Tanod chainpeek in Onchain & crypto

x402 APIPassing, checked 3 h ago

chainpeek (Tanod) Nostr decoder: NIP-19 npub, note, nprofile, nevent and naddr to hex and TLV fields, and NIP-05 name@domain to a public key. Secret keys are refused. Use when an agent must turn a Nostr npub, nprofile, note, nevent or naddr into hex, or resolve a NIP-05 address.

POST https://tanod.dev/v1/nostr/decode

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
1.2 s typical, 1.2 s slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

POST https://tanod.dev/v1/nostr/decode

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://tanod.dev/v1/nostr/decode
content-type: application/json

{
  "input": "nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gpp4mhxue69uhhytnc9e3k7mgpz4mhxue69uhkg6nzv9ejuumpv34kytnrdaksjlyr9p"
}

Parameters

ParameterTypeRequiredDescription
inputstringYesA NIP-19 identifier (npub1..., note1..., nprofile1..., nevent1... or naddr1..., an optional 'nostr:' prefix is accepted) or a NIP-05 address (name@domain, or a bare domain for _@domain). Secret keys (nsec1...) are refused and never decoded.
verify_nip05string or nullNoOptional NIP-05 address (name@domain) to check against the key of an npub, nprofile, nevent (with author) or naddr: the domain's nostr.json must map the name to that key (result nip05.verified). Default: null.

Example response

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

Example response, 30 lines
{
  "hex": "3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d",
  "hex_meaning": "pubkey",
  "input_type": "nip19",
  "nostr_uri": "nostr:nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gpp4mhxue69uhhytnc9e3k7mgpz4mhxue69uhkg6nzv9ejuumpv34kytnrdaksjlyr9p",
  "npub": "npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6",
  "pubkey_hex": "3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d",
  "relays": [
    "wss://r.x.com",
    "wss://djbas.sadkb.com"
  ],
  "tlv": [
    {
      "name": "special",
      "type": 0,
      "value": "3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d"
    },
    {
      "name": "relay",
      "type": 1,
      "value": "wss://r.x.com"
    },
    {
      "name": "relay",
      "type": 1,
      "value": "wss://djbas.sadkb.com"
    }
  ],
  "type": "nprofile"
}

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://tanod.dev/v1/nostr/decode' \
  -H 'content-type: application/json' \
  --data-raw '{"input":"nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gpp4mhxue69uhhytnc9e3k7mgpz4mhxue69uhkg6nzv9ejuumpv34kytnrdaksjlyr9p"}'

# 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://tanod.dev/v1/nostr/decode' \
  -H 'content-type: application/json' \
  --data-raw '{"input":"nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gpp4mhxue69uhhytnc9e3k7mgpz4mhxue69uhkg6nzv9ejuumpv34kytnrdaksjlyr9p"}' \
  | 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%2Ftanod.dev%2Fv1%2Fnostr%2Fdecode&method=POST
const res = await pay("https://tanod.dev/v1/nostr/decode", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "input": "nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gpp4mhxue69uhhytnc9e3k7mgpz4mhxue69uhkg6nzv9ejuumpv34kytnrdaksjlyr9p"
  }),
});
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://tanod.dev/v1/nostr/decode",
        json={
            "input": "nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gpp4mhxue69uhhytnc9e3k7mgpz4mhxue69uhkg6nzv9ejuumpv34kytnrdaksjlyr9p",
        },
    )
    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
3 h agoPassed4021.2 s$0.001
7 h agoPassed4022.3 s$0.001
16 h agoPassed402267 ms$0.001