SERVER

x402 Wallet

Rank #7,985

io.github.nirholas/x402-mcp

Self-custodial x402 wallet for AI agents: pay any service in USDC or $THREE from your own key.

4 versions

235 GitHub stars

by nirholas (95 servers)View repository ↗

First listed

Jun 23, 2026

Last publish date

Oct 10, 2026

PURPOSE

What you can do with x402 Wallet

x402 Wallet is a Model Context Protocol (MCP) server published by nirholas. It ranks #7,985 of 144,396 active servers on MCP Toplist, and its repository has 235 GitHub stars. x402 Wallet is listed on Official MCP, with 4 tracked versions. It was first listed on Jun 23, 2026 and most recently updated on Oct 10, 2026.

Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.

CAPABILITIES AND LIMITATIONS

What x402 Wallet can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

REQUIREMENTS

What you need before using x402 Wallet

DeclaredNo credentialsNo credentials declared

The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.

Declared by the Official MCP Registry, last synced Oct 16, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

SOLANA_SECRET_KEY · optional
SOLANA_RPC_URL · optional
MAX_PAY_USD · optional
REQUIRE_CONFIRM · optional
THREE_WS_BASE · optional

INSTALLATION AND FIRST TASK

Connect x402 Wallet and confirm it works

npm package

claude mcp add x402-mcp -e "SOLANA_SECRET_KEY=<your SOLANA_SECRET_KEY>" -e "SOLANA_RPC_URL=<your SOLANA_RPC_URL>" -e "MAX_PAY_USD=<your MAX_PAY_USD>" -e "REQUIRE_CONFIRM=<your REQUIRE_CONFIRM>" -e "THREE_WS_BASE=<your THREE_WS_BASE>" -- npx -y @three-ws/x402-mcp

Replace each placeholder with your own value before saving.

npm package

[mcp_servers.x402-mcp]
command = "npx"
args = ["-y", "@three-ws/x402-mcp"]

[mcp_servers.x402-mcp.env]
SOLANA_SECRET_KEY = "<your SOLANA_SECRET_KEY>"
SOLANA_RPC_URL = "<your SOLANA_RPC_URL>"
MAX_PAY_USD = "<your MAX_PAY_USD>"
REQUIRE_CONFIRM = "<your REQUIRE_CONFIRM>"
THREE_WS_BASE = "<your THREE_WS_BASE>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/x402-mcp"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "<your SOLANA_SECRET_KEY>",
        "SOLANA_RPC_URL": "<your SOLANA_RPC_URL>",
        "MAX_PAY_USD": "<your MAX_PAY_USD>",
        "REQUIRE_CONFIRM": "<your REQUIRE_CONFIRM>",
        "THREE_WS_BASE": "<your THREE_WS_BASE>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/x402-mcp"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "<your SOLANA_SECRET_KEY>",
        "SOLANA_RPC_URL": "<your SOLANA_RPC_URL>",
        "MAX_PAY_USD": "<your MAX_PAY_USD>",
        "REQUIRE_CONFIRM": "<your REQUIRE_CONFIRM>",
        "THREE_WS_BASE": "<your THREE_WS_BASE>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "x402-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/x402-mcp"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "<your SOLANA_SECRET_KEY>",
        "SOLANA_RPC_URL": "<your SOLANA_RPC_URL>",
        "MAX_PAY_USD": "<your MAX_PAY_USD>",
        "REQUIRE_CONFIRM": "<your REQUIRE_CONFIRM>",
        "THREE_WS_BASE": "<your THREE_WS_BASE>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/x402-mcp"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "<your SOLANA_SECRET_KEY>",
        "SOLANA_RPC_URL": "<your SOLANA_RPC_URL>",
        "MAX_PAY_USD": "<your MAX_PAY_USD>",
        "REQUIRE_CONFIRM": "<your REQUIRE_CONFIRM>",
        "THREE_WS_BASE": "<your THREE_WS_BASE>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/x402-mcp"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "<your SOLANA_SECRET_KEY>",
        "SOLANA_RPC_URL": "<your SOLANA_RPC_URL>",
        "MAX_PAY_USD": "<your MAX_PAY_USD>",
        "REQUIRE_CONFIRM": "<your REQUIRE_CONFIRM>",
        "THREE_WS_BASE": "<your THREE_WS_BASE>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

First successful task

After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.

ALTERNATIVES

When to choose another server

Other servers by nirholas

View all nirholas servers →

No task-specific alternatives are catalogued for x402 Walletyet; the list above is its publisher's other servers.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Jun 23, 2026
Latest version published: Oct 10, 2026
Version history: 4 versions tracked (below)
Requirements evidence: Declared by the Official MCP Registry, last synced Oct 16, 2026. Not independently verified by MCP Toplist.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Oct 10, 2026

Registry sightings

Official MCP ↗listed since Jul 24, 2026 · still listed

Do you maintain x402 Wallet? to correct or enrich this profile.

VERSIONS

Available versions (4)

Version	Published
0.2.3	Oct 10, 2026
0.2.2	Aug 19, 2026
0.2.1	Jul 20, 2026
0.1.0	Jun 23, 2026

STANDING

#7,985of 144,396 active serversTop 10%

Ranks ahead of 136,411 of 144,396 servers on MCP Toplist.

Recent momentum

+149GitHub stars since Jul 20 (+173%)

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.nirholas%2Fx402-mcp.svg)](https://mcptoplist.com/server/io.github.nirholas%2Fx402-mcp)

HTML

<a href="https://mcptoplist.com/server/io.github.nirholas%2Fx402-mcp"><img src="https://mcptoplist.com/badge/io.github.nirholas%2Fx402-mcp.svg" alt="MCP Toplist: Top 10% of 144,396" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Who maintains x402 Wallet?: x402 Wallet is maintained by nirholas, which publishes 95 MCP servers (226 total versions) tracked on MCP Toplist.
Is x402 Wallet listed on the Official MCP Registry?: Yes — x402 Wallet is listed on the Official MCP Registry.
How many versions does x402 Wallet have?: MCP Toplist tracks 4 versions of x402 Wallet, most recently published on Oct 10, 2026.
Where can I find the source code for x402 Wallet?: The source code for x402 Wallet is hosted at github.com/nirholas/three.ws.

Used in projects

Do you run this server?

Community projects list the MCP servers behind real agents and apps. Publish yours and this page will link to it.

EXPLORE

All MCP Servers Official MCP Servers GitHub MCP Servers Best MCP Servers Most Active MCP Servers New MCP Servers Best New MCP Servers