x402 Universal Payer
Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.
Install and compare this MCP server
Use this profile to copy client config, check auth requirements, review tools and resources, and compare related MCP servers before adding it to an AI client.
- Install
- npx -y @three-ws/mcp-bridge
- Clients
- Claude, Cursor, VS Code, Codex
- Transport
- STDIO
- Auth
- Not captured
- Capabilities
- 0 tools, 0 resources, 0 prompts
- Related
- XActions, Pump SDK MCP Server, Robinhood Crypto
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Install
Connection
- Transport
- STDIO
- Command
npx -y @three-ws/mcp-bridge- Environment
{ "MCP_BRIDGE_EVM_PRIVATE_KEY": "YOUR_SECRET_VALUE", "MCP_BRIDGE_SVM_PRIVATE_KEY": "YOUR_SECRET_VALUE", "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "100000", "MCP_BRIDGE_MAX_TOTAL_ATOMIC": "1000000", "MCP_BRIDGE_ALLOWED_PAYTO": "YOUR_VALUE_HERE", "MCP_BRIDGE_ALLOWED_HOSTS": "YOUR_VALUE_HERE", "MCP_BRIDGE_ALLOW_HTTP": "0", "MCP_BRIDGE_DISCOVER_LIMIT": "20", "MCP_BRIDGE_BAZAAR_URL": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "5", "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "5000000", "X402_MCP_BRIDGE_CHANNELS_DIR": "~/.x402-mcp-bridge/channels", "RPC_URL_8453": "YOUR_VALUE_HERE" }
Claude Desktop
Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.
{
"mcpServers": {
"io-github-nirholas-x402-bridge": {
"command": "npx",
"args": [
"-y",
"@three-ws/mcp-bridge"
],
"env": {
"MCP_BRIDGE_EVM_PRIVATE_KEY": "YOUR_SECRET_VALUE",
"MCP_BRIDGE_SVM_PRIVATE_KEY": "YOUR_SECRET_VALUE",
"MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "100000",
"MCP_BRIDGE_MAX_TOTAL_ATOMIC": "1000000",
"MCP_BRIDGE_ALLOWED_PAYTO": "YOUR_VALUE_HERE",
"MCP_BRIDGE_ALLOWED_HOSTS": "YOUR_VALUE_HERE",
"MCP_BRIDGE_ALLOW_HTTP": "0",
"MCP_BRIDGE_DISCOVER_LIMIT": "20",
"MCP_BRIDGE_BAZAAR_URL": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
"MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "5",
"MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "5000000",
"X402_MCP_BRIDGE_CHANNELS_DIR": "~/.x402-mcp-bridge/channels",
"RPC_URL_8453": "YOUR_VALUE_HERE"
}
}
}
}Config location
- macOS
~/Library/Application Support/Claude/claude_desktop_config.json- Windows
%APPDATA%\Claude\claude_desktop_config.json
Auth
Package transportNo remote HTTP endpoint is advertised. Use the package or stdio setup shown in Install.
Tools & Resources
No public tools, resources, or prompts captured yet. Use Auth when this server requires credentials.
Tools
No tools captured yet.
Resources
No resources captured yet.
Prompts
No prompts captured yet.
Questions
What is x402 Universal Payer?+
x402 Universal Payer is an MCP server for Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.. It supports STDIO transport.
How do I install x402 Universal Payer?+
Use the generated config in Install. This server runs with npx -y @three-ws/mcp-bridge; add any required environment variables before starting your client.
How do I add x402 Universal Payer to Claude Desktop?+
Choose the Claude Desktop tab in Install and copy the config for npx -y @three-ws/mcp-bridge. Add required environment variables before starting Claude Desktop.
How do I add x402 Universal Payer to Claude Code?+
Choose the Claude Code tab in Install and copy the config for npx -y @three-ws/mcp-bridge. Add required environment variables before starting Claude Code.
How do I use x402 Universal Payer with Codex?+
Choose the Codex tab in Install and copy the config for npx -y @three-ws/mcp-bridge. Add required environment variables before starting Codex.
How do I add x402 Universal Payer to Cursor or VS Code?+
Choose the Cursor or VS Code tab in Install and copy the config for npx -y @three-ws/mcp-bridge. Add required environment variables before starting Cursor or VS Code.
What endpoint and transport does x402 Universal Payer use?+
x402 Universal Payer uses STDIO transport. Use the package or command config in Install.
What tools and resources does x402 Universal Payer expose?+
x402 Universal Payer inventory is listed when the MCP endpoint exposes tools, resources, or prompts. Some servers require auth first.
Does x402 Universal Payer require authentication?+
x402 Universal Payer does not advertise a verified auth requirement. If discovery fails, it may still need provider login, an API key, a bearer token, or a session header.
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Profile notes
- Package: Npm @three-ws/mcp-bridge v1.0.1
- Environment variable: MCP_BRIDGE_EVM_PRIVATE_KEY (secret)
- Environment variable: MCP_BRIDGE_SVM_PRIVATE_KEY (secret)
- Environment variable: MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC (default 100000)
- Environment variable: MCP_BRIDGE_MAX_TOTAL_ATOMIC (default 1000000)
- Environment variable: MCP_BRIDGE_ALLOWED_PAYTO
- Environment variable: MCP_BRIDGE_ALLOWED_HOSTS
- Environment variable: MCP_BRIDGE_ALLOW_HTTP (default 0)
- Environment variable: MCP_BRIDGE_DISCOVER_LIMIT (default 20)
- Environment variable: MCP_BRIDGE_BAZAAR_URL (default https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources)
- Environment variable: MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER (default 5)
- Environment variable: MCP_BRIDGE_MAX_DEPOSIT_ATOMIC (default 5000000)
- Environment variable: X402_MCP_BRIDGE_CHANNELS_DIR (default ~/.x402-mcp-bridge/channels)
- Environment variable: RPC_URL_8453
Packages
| Package | Registry | Version | Inputs |
|---|---|---|---|
@three-ws/mcp-bridgestdio | npm | 1.0.1 | Env: MCP_BRIDGE_EVM_PRIVATE_KEY secret Env: MCP_BRIDGE_SVM_PRIVATE_KEY secret Env: MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC Env: MCP_BRIDGE_MAX_TOTAL_ATOMIC Env: MCP_BRIDGE_ALLOWED_PAYTO Env: MCP_BRIDGE_ALLOWED_HOSTS Env: MCP_BRIDGE_ALLOW_HTTP Env: MCP_BRIDGE_DISCOVER_LIMIT Env: MCP_BRIDGE_BAZAAR_URL Env: MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER Env: MCP_BRIDGE_MAX_DEPOSIT_ATOMIC Env: X402_MCP_BRIDGE_CHANNELS_DIR Env: RPC_URL_8453 |
Details
- Version
- 1.0.1
- Repository
- https://github.com/nirholas/three.ws
- Website
- https://three.ws
- Updated
- Jul 20, 2026