x402 Developer Bundle

Who it’s for

Built for developers charging agents per call in USDC.

What’s inside

Bought separately these cost $96. Each kit is the exact, unchanged version sold on its own page.

• x402 Builder Skills: 4 agent skills to ship and test a pay-per-call x402 API ($29 alone)
• x402 Paid Agent Starter: TypeScript + Python x402 paid endpoint and paying client templates ($29 alone)
• Hermes x402 Plugin Template: Hermes Agent x402 plugin template with approval prompts and spend caps ($19 alone)
• ElizaOS MCP + x402 Plugin Template: ElizaOS plugin template for MCP tools with payment-aware actions (TypeScript, bun) ($19 alone)

What you get

One zip with every kit in components/, run_all_tests.sh (runs each kit’s own tests in place) and MANIFEST.sha256 (the sha256 of each kit’s original download).

How they fit

Build the paid endpoint (starter) -> verify settlement (skills) -> let agents pay it (Hermes/ElizaOS plugins).

Quick start

• Open the README of the kit you need first (links above). Each one runs on its own.
• ./run_all_tests.sh runs every kit's own test suite in place and prints one line per kit. Kits that need packages (npm, pip) install them into their own folder (node_modules/, .venv/); nothing is installed globally.
• MANIFEST.sha256 lists the sha256 of each kit's original download, so you can check it against a fresh copy.

Honest limits

• Each kit’s own README ‘Honest limits’ apply unchanged.
• The bundle is the same files as the individual products (no extra code), so a buyer who owns one kit is paying for the rest.
• Updates ship per kit.

Requirements

Python 3.9+ for the Python kits; Node 20+ for the TypeScript kits and bun for the ElizaOS template. Tests run offline except for package installs.

Format and license

Zip, 143 KB, v1.0, 87 files. Each kit keeps its own license: use and modify the kits for your own work and for clients you serve; do not resell, sublicense or publish the kits themselves.

FAQ

Is this the official x402 SDK?

No; it uses the public x402 packages. Not affiliated with Coinbase.

Which chains?

See each kit's README (the tests run offline, no chain needed).

Do the tests need a wallet or funds?

No.

How do I get the files?

Right after payment, Stripe’s confirmation page shows your download link.

Refunds?

Email hello@youraitools.co within 14 days if it doesn’t work and we can’t fix it.

Can I pay with crypto?

Yes. Pay the same price in USDC or USDT on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana from the "Pay with crypto" button, with no account or KYC. We check the payment on-chain and show your download links as soon as it confirms.

Pairs well with

Related

• x402 Builder Skills
• x402 Paid Agent Starter
• Hermes x402 Plugin Template
• ElizaOS MCP + x402 Plugin Template
• MCP Server Builder Bundle
• All agent templates