# X402 Mcp Stellar

> MCP server to enable x402 payments on the Stellar network

- **Type:** MCP server
- **Install:** `agentstack add mcp-jamesbachini-x402-mcp-stellar`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [jamesbachini](https://agentstack.voostack.com/s/jamesbachini)
- **Installs:** 0
- **Category:** [Finance & Payments](https://agentstack.voostack.com/c/finance-and-payments)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [jamesbachini](https://github.com/jamesbachini)
- **Source:** https://github.com/jamesbachini/x402-mcp-stellar

## Install

```sh
agentstack add mcp-jamesbachini-x402-mcp-stellar
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# x402 Stellar MCP Server

Local MCP server (stdio) that can call x402-protected HTTP resources and automatically pay in Stellar USDC.

## Features

- Payment flow (`stellar:testnet` or `stellar:pubnet`)
- Default testnet configuration
- Mainnet-ready via env switch
- Optional OpenZeppelin facilitator auth via env
- No resource whitelist: URL is provided at tool call time

## Tools Exposed

- `x402_wallet_info`: shows active wallet address/network/config
- `x402_facilitator_supported`: checks configured facilitator `/supported` endpoint
- `fetch_paid_resource`: generic paid fetch (`url`, `method`, optional body/headers)

## Prerequisites

- Node.js 20+
- A Stellar wallet funded with testnet XLM + testnet USDC
- x402 resource server running (your `app/index.js` demo)
- x402 facilitator running on `http://localhost:4022`

## Setup

```bash
npm install
cp .env.example .env
```

### Testnet 
For testnet you'll need to run a facilitator locally on port 4022. I'd recommend using the one included in the coinbase x402 repo:
https://github.com/coinbase/x402/tree/main/examples/typescript/facilitator/advanced

Update `.env` with your wallet key:

```dotenv
STELLAR_SECRET_KEY=S...
STELLAR_NETWORK=stellar:testnet
```

### Pubnet

For mainnet you'll just need an OpenZeppelin API Key for the relayer. You can get one here (Thank you for making this easy):
https://channels.openzeppelin.com/gen

```dotenv
STELLAR_NETWORK=stellar:pubnet
STELLAR_RPC_URL=https://rpc.lightsail.network/
X402_FACILITATOR_URL=https://channels.openzeppelin.com/x402
X402_FACILITATOR_API_KEY=
```

`X402_FACILITATOR_API_KEY` is optional in general, but required for OpenZeppelin channels.
When set, `fetch_paid_resource` auto-adds `Authorization: Bearer ` for requests under `X402_FACILITATOR_URL` (unless you provide `Authorization` explicitly).

## Run

```bash
npm run dev
```

The MCP server runs over stdio for Claude/Codex integrations.

## Add To Claude / Codex

Use an MCP entry like (don't forget to change the path/):

### Codex

```bash
codex mcp add x402-stellar -- npm --silent --prefix /absolute/path/to/x402-mcp-stellar run dev
```

### Claude Code
```bash
claude mcp add x402-stellar -- npm --silent --prefix /absolute/path/to/x402-mcp-stellar run dev
```

### Claude Desktop (untested)

```json
{
  "mcpServers": {
    "x402-stellar": {
      "command": "npm",
      "args": ["--silent", "--prefix", "/absolute/path/to/x402-mcp-stellar", "run", "dev"]
    }
  }
}
```

This server loads `.env` from the project directory (`/absolute/path/to/x402-mcp-stellar/.env`).

## Claude Usage

After loading the MCP server, you can ask:

`Can you fetch the resource at http://localhost:3000/my-service, use the x402-stellar MCP server to pay for it, and print the response?`

The tool call will pass that full URL at runtime; no URL allowlist or hardcoded endpoint is required in this MCP server.

## Notes

- `@x402/stellar` is not currently published on npm, so this repo vendors the Stellar mechanism under `src/stellar`.
- Default testnet Soroban RPC is used automatically.
- Mainnet requires `STELLAR_RPC_URL`.

## License

MIT

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [jamesbachini](https://github.com/jamesbachini)
- **Source:** [jamesbachini/x402-mcp-stellar](https://github.com/jamesbachini/x402-mcp-stellar)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** yes
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-jamesbachini-x402-mcp-stellar
- Seller: https://agentstack.voostack.com/s/jamesbachini
- Browse the marketplace: https://agentstack.voostack.com/browse

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