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X402 Wallet
Power your agent
Add this server
The publisher's own command. Not a PlugMCP endpoint.
Host a copy with our keys and logs.
Local command
npx -y @three-ws/[email protected]Credentials from the publisher
- SOLANA_SECRET_KEY — Base58 (or JSON byte-array) Solana secret key that signs payments and holds the USDC. Not needed for the read tools (find_services, inspect_endpoint, or x402_wallet with an explicit address). Treat like cash.
- SOLANA_RPC_URL — Solana mainnet RPC endpoint. Defaults to the public cluster — bring your own (Helius / Quicknode / Triton) for production traffic.
- MAX_PAY_USD — Max USD a single pay_and_call may spend. Bounds a runaway or injected payment.
- REQUIRE_CONFIRM — When on (default), pay_and_call refuses until re-issued with confirm:true. Set 0/false to disable the gate.
- THREE_WS_BASE — Base URL of the three.ws API that serves /api/bazaar/search for find_services. Override only when self-hosting.
Claude Code has no install link for a local command. Copy the command below and run it in a terminal.
shClaude Code
SOLANA_SECRET_KEY=<secret> SOLANA_RPC_URL=<value> MAX_PAY_USD=<value> REQUIRE_CONFIRM=<value> THREE_WS_BASE=<value> claude mcp add io.github.nirholas-x402-mcp -- npx -y @three-ws/x402-mcp@0.2.3Run in a terminal.
jsonClaude Desktop
{ "mcpServers": { "io.github.nirholas-x402-mcp": { "command": "npx", "args": [ "-y", "@three-ws/[email protected]" ], "env": { "SOLANA_SECRET_KEY": "<secret>", "SOLANA_RPC_URL": "<value>", "MAX_PAY_USD": "<value>", "REQUIRE_CONFIRM": "<value>", "THREE_WS_BASE": "<value>" } } }}claude_desktop_config.json
Local · npmPublisher installStep-by-step: add this in Claude
Remote URL or a command on your machine? How the two installs differ
Run on PlugMCP
Host a copy with our keys and logs.
A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.
LaunchServer facts
Local- Transport
- stdio
- Version
Tools
Tools
No tool list yet. Remote servers get one after the first health check.
FAQ