io.github.nirholas/x402-mcp
x402 Wallet
Is the x402 Wallet MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.
Self-custodial x402 wallet for AI agents: pay any service in USDC or $THREE from your own key.
alive probed 2026-11-14 · unchanged since 2026-10-30
- Run it
- npx -y @three-ws/x402-mcp@0.2.3 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- x402-mcp 0.2.3
- Capabilities
- tools
- Instructions
- 623 characters
- Of a 1M window
- 0.2 % of a 1M context window
- Count
- 1.8k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 1.9k. The o200k_base estimate is 1.0k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/nirholas/three.ws
- Website
- https://three.ws
- Registry
- active, updated 2026-10-10 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.74×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| pay_and_call | 890 | 511 | 49 % |
| find_services | 420 | 241 | 23 % |
| inspect_endpoint | 291 | 167 | 16 % |
| x402_wallet | 227 | 130 | 12 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- three.ws Tutor io.github.nirholas/tutor-mcp · alive
- three.ws Vanity io.github.nirholas/vanity-mcp · alive
- three.ws Vision io.github.nirholas/vision-mcp · alive
- x402 Universal Payer io.github.nirholas/x402-bridge · crashed on start
- XActions io.github.nirholas/xactions · crashed on start
- Code Crawler io.github.nithin554/code-crawler · crashed on start
- io.github.nitishagar/lumen · crashed on start
- Prompt Optimizer io.github.nivlewd1/mcp-prompt-optimizer · needs env
Servers that mention x402.
- Cabrini Market Data ai.cabrini/market-data · TLS error
- Council of AI GSPC ai.councilof/gspc · alive
- ai.deskcrew/agentic · not found
- DripMetrics ai.dripmetrics/mcp · alive
- ai.edge-agents/intelligence · alive
- ai.firmbrain/x402-services · not found
- ai.iturri/market-data · alive
- Kifly — Agentic Commerce & Payments ai.kifly/mcp · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.