Registry Helm

{
  "charts": [
    {
      "app_version": "1.31.6",
      "description": "NGINX Open Source is a web server that can be also used as a reverse proxy, load balancer, and HTTP cache. Recommended for high-demanding sites due to its ability to provide faster content.",
      "name": "nginx",
      "official": false,
      "repository": "bitnami",
      "repository_url": "https://charts.bitnami.com/bitnami",
      "stars": 107,
      "url": "https://artifacthub.io/packages/helm/bitnami/nginx",
      "verified_publisher": true,
      "version": "25.2.1"
    },
    {
      "app_version": "1.31.6",
      "description": "Nginx is a high-performance HTTP server and reverse proxy.",
      "name": "nginx",
      "official": false,
      "repository": "cloudpirates-nginx",
      "repository_url": "oci://registry-1.docker.io/cloudpirates/nginx",
      "stars": 7,
      "url": "https://artifacthub.io/packages/helm/cloudpirates-nginx/nginx",
      "verified_publisher": true,
      "version": "0.16.12"
    },
    {
      "app_version": "1.31.1",
      "description": "Bitnami-compatible NGINX Helm chart for NiceOS",
      "name": "nginx",
      "official": false,
      "repository": "niceos",
      "repository_url": "https://helm.nice-soft.com",
      "stars": 1,
      "url": "https://artifacthub.io/packages/helm/niceos/nginx",
      "verified_publisher": true,
      "version": "1.31.1+niceos.2"
    }
  ],
  "count": 3,
  "install_hint": "helm repo add <repository> <repository_url> && helm install <release> <repository>/<name>",
  "query": "nginx",
  "source": "Artifact Hub"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/registry/helm?limit=3&q=nginx'

# 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 - 'https://saylorinnovations.com/api/registry/helm?limit=3&q=nginx' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fregistry%2Fhelm
const res = await pay("https://saylorinnovations.com/api/registry/helm?limit=3&q=nginx");
console.log(res.status, await res.text());

# 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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/registry/helm?limit=3&q=nginx")
    print(res.status_code, res.text)