X402 Wallet

Name: X402 Wallet
Author: nirholas

nirholas/three.ws

89 repo stars
Updated July 28, 2026
nirholas/three.ws

Gives an AI agent a self-custodial wallet to discover, inspect, and pay any x402 service in USDC on Solana, with spend caps and a confirm gate.

About

x402 Wallet is a self-custodial MCP wallet that lets an AI agent discover, inspect, and pay any x402 service in USDC on Solana. A solo builder reaches for it when they want an agent to autonomously pay for API calls or services, while guardrails like a per-payment USD cap and a required confirm step bound the risk of a runaway or injected payment. Read-only discovery tools work without a key.

Self-custodial x402 wallet for agents
Discover, inspect, and pay services in USDC
Per-call max-spend cap
Confirm-gate before any payment
Runs on Solana over stdio via npx

X402 Wallet by the numbers

Data as of Jul 28, 2026 (Skillselion catalog sync)

terminal

claude mcp add --env SOLANA_SECRET_KEY=YOUR_SOLANA_SECRET_KEY --env SOLANA_RPC_URL=YOUR_SOLANA_RPC_URL --env MAX_PAY_USD=YOUR_MAX_PAY_USD --env REQUIRE_CONFIRM=YOUR_REQUIRE_CONFIRM --env THREE_WS_BASE=YOUR_THREE_WS_BASE x402-mcp -- npx -y @three-ws/x402-mcp

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