x402tool

Pay for APIs with x402-protected on Solana, from the command line.

x402tool is like curl for x402 APIs. Hit any x402-protected endpoint, and the CLI handles the payment and retries automatically.

# See what it costs
x402tool GET https://jupiter.api.corbits.dev/tokens/v2/recent --dry-run

# Pay and get the response
x402tool GET https://jupiter.api.corbits.dev/tokens/v2/recent --keypair auth.json

Install

npm install -g x402tool

Node.js v18+.

Quick Start

1. Preview what you'll pay — always start here:

x402tool GET https://api.example.com/data --dry-run

2. Make the request — add your Solana keypair:

x402tool GET https://api.example.com/data --keypair ~/.config/solana/auth.json

That's it. The CLI detects the 402 response, submits a Solana payment, and retries with proof.

Usage

POST with a body

x402tool POST https://triton.api.corbits.dev \
  --keypair auth.json \
  --body '{"jsonrpc":"2.0","id":1,"method":"getBalance","params":["corzHctjX9Wtcrkfxz3Se8zdXqJYCaamWcQA7vwKF7Q"]}'

Query parameters

x402tool GET "https://jupiter.api.corbits.dev/ultra/v1/order" \
  --query inputMint=So11111111111111111111111111111111111111112 \
  --query outputMint=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v \
  --query amount=20000000 \
  --query taker=YOUR_WALLET_ADDRESS

Custom headers

Use repeatable headers with either Key: Value or key=value:

x402tool GET https://api.example.com/data \
  --header "x-api-key: abc123" \
  --header x-client-id=my-agent

Save to file

x402tool GET https://api.example.com/data -o response.json

Path must be under the current directory.

Agent / script mode

--json gives machine-readable output. --quiet suppresses wallet and timing logs.

x402tool GET https://api.example.com/data --dry-run --json --quiet
x402tool POST https://api.example.com/action --keypair auth.json --quiet -o result.json

Timeout

Default is 30s. Override in milliseconds:

x402tool GET https://api.example.com/slow --timeout 60000

Real-World Examples

These use Corbits x402-protected APIs.

Jupiter — preview costs

x402tool GET "https://jupiter.api.corbits.dev/ultra/v1/order" \
  --dry-run \
  --query inputMint=So11111111111111111111111111111111111111112 \
  --query outputMint=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v \
  --query amount=20000000 \
  --query taker=YOUR_WALLET_ADDRESS

Jupiter — paid request

x402tool GET https://jupiter.api.corbits.dev/tokens/v2/recent \
  --keypair ~/.config/solana/auth.json

Triton RPC — dry-run

x402tool POST https://triton.api.corbits.dev \
  --dry-run \
  --body '{"jsonrpc":"2.0","id":1,"method":"getBalance","params":["corzHctjX9Wtcrkfxz3Se8zdXqJYCaamWcQA7vwKF7Q"]}'

Triton RPC — with payment

x402tool POST https://triton.api.corbits.dev \
  --keypair ~/.config/solana/auth.json \
  --body '{"jsonrpc":"2.0","id":1,"method":"getBalance","params":["corzHctjX9Wtcrkfxz3Se8zdXqJYCaamWcQA7vwKF7Q"]}'

MetEngine — trending prediction markets

x402tool GET https://agent.metengine.xyz/api/v1/markets/trending \
  --keypair ~/.config/solana/auth.json \
  -o result.json

CoinGecko — simple price (multiple query params)

x402tool GET "https://pro-api.coingecko.com/api/v3/x402/simple/price" \
  --keypair ~/.config/solana/auth.json \
  --query vs_currencies=usd --query symbols=btc,eth,sol --query include_market_cap=true

Keypair

Standard Solana keypair format — a JSON array of numbers. Must be under cwd or home.

solana-keygen new -o my-keypair.json

How It Works

1. You make a request (GET or POST).
2. If the API returns 402, the CLI parses payment requirements via @x402/core.
3. It signs and submits a Solana transaction with @x402/svm.
4. It retries the original request with the payment proof attached.

With --dry-run, it stops at step 2 and shows you the requirements.

The network (mainnet/devnet) is determined by the API's payment response, not by a CLI flag.

Options

Flag	What it does
--keypair <path>	Solana keypair for payment
--dry-run	Preview costs, don't pay
--body <json>	JSON body (POST only)
--query <k=v>	Query param (repeatable)
--header <header>	HTTP header (repeatable)
--rpc-url <url>	Solana RPC (or SOLANA_RPC_URL env)
--json	Machine-readable output
--quiet	Suppress extra logs
--timeout <ms>	Request timeout (default: 30000)
-o, --output <path>	Write response to file

Features

• Automatic Solana payment on 402 responses
• Dry-run mode to preview costs
• GET and POST with optional JSON body
• Agent-friendly JSON and quiet modes
• Configurable timeout, query params, output path
• URL scheme and keypair path validation

Development

git clone https://github.com/pratikbuilds/x402-cli.git
cd x402-cli
npm install
npm run build
node dist/index.js GET <url>

Contributing

Fork, branch, commit, push, open a PR.

License

MIT — see LICENSE.