SERVER

x402-sms-mcp

Rank #57,787

io.github.UltraStarz/x402-sms

Pay-per-call MCP server. $0.03 USDC sends one transactional SMS to a US phone number via x402.

1 version

by UltraStarz (4 servers)View repository ↗

First listed

May 14, 2026

Last publish date

May 15, 2026

PURPOSE

What you can do with x402-sms-mcp

x402-sms-mcp is a Model Context Protocol (MCP) server published by UltraStarz. It ranks #57,787 of 167,945 active servers on MCP Toplist. x402-sms-mcp is listed across 3 registries — Official MCP, PulseMCP and Glama, with 1 tracked version. It was first listed on May 14, 2026 and most recently updated on May 15, 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-sms-mcp 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-sms-mcp

DeclaredAPI keyCredentials declared

The registry listing declares required configuration before first use — typically an API key, token or connection string set via environment variables.

Declared by Glama, last synced Nov 3, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

BUYER_PRIVATE_KEY · required

INSTALLATION AND FIRST TASK

Connect x402-sms-mcp and confirm it works

npm package

claude mcp add x402-sms -e "BUYER_PRIVATE_KEY=<your BUYER_PRIVATE_KEY>" -- npx -y x402-sms-mcp

Replace each placeholder with your own value before saving.

npm package

[mcp_servers.x402-sms]
command = "npx"
args = ["-y", "x402-sms-mcp"]

[mcp_servers.x402-sms.env]
BUYER_PRIVATE_KEY = "<your BUYER_PRIVATE_KEY>"

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

npm package

{
  "mcpServers": {
    "x402-sms": {
      "command": "npx",
      "args": [
        "-y",
        "x402-sms-mcp"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "<your BUYER_PRIVATE_KEY>"
      }
    }
  }
}

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

npm package

{
  "mcpServers": {
    "x402-sms": {
      "command": "npx",
      "args": [
        "-y",
        "x402-sms-mcp"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "<your BUYER_PRIVATE_KEY>"
      }
    }
  }
}

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-sms": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "x402-sms-mcp"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "<your BUYER_PRIVATE_KEY>"
      }
    }
  }
}

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

npm package

{
  "mcpServers": {
    "x402-sms": {
      "command": "npx",
      "args": [
        "-y",
        "x402-sms-mcp"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "<your BUYER_PRIVATE_KEY>"
      }
    }
  }
}

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

npm package

{
  "mcpServers": {
    "x402-sms": {
      "command": "npx",
      "args": [
        "-y",
        "x402-sms-mcp"
      ],
      "env": {
        "BUYER_PRIVATE_KEY": "<your BUYER_PRIVATE_KEY>"
      }
    }
  }
}

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 UltraStarz

Tollkit#26,440

View all UltraStarz servers →

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

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: May 14, 2026
Latest version published: May 15, 2026
Version history: 1 version tracked (below)
Requirements evidence: Declared by Glama, last synced Nov 3, 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: Nov 3, 2026

Registry sightings

Official MCP ↗listed since May 15, 2026 · still listed
PulseMCP ↗listed since Jun 4, 2026 · still listed
Glama ↗listed since Jul 29, 2026 · still listed

Do you maintain x402-sms-mcp? to correct or enrich this profile.

VERSIONS

Available versions (1)

Version	Published
0.1.0	May 15, 2026

STANDING

#57,787of 167,945 active serversTop 50%

Ranks ahead of 110,158 of 167,945 servers on MCP Toplist.

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.UltraStarz%2Fx402-sms.svg)](https://mcptoplist.com/server/io.github.UltraStarz%2Fx402-sms)

HTML

<a href="https://mcptoplist.com/server/io.github.UltraStarz%2Fx402-sms"><img src="https://mcptoplist.com/badge/io.github.UltraStarz%2Fx402-sms.svg" alt="MCP Toplist: Top 50% of 167,945" /></a>

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

FAQ

Frequently asked questions

Who maintains x402-sms-mcp?: x402-sms-mcp is maintained by UltraStarz, which publishes 4 MCP servers (11 total versions) tracked on MCP Toplist.
Is x402-sms-mcp listed on the Official MCP Registry?: Yes — x402-sms-mcp is listed on the Official MCP Registry, alongside PulseMCP and Glama.
How many versions does x402-sms-mcp have?: MCP Toplist tracks 1 version of x402-sms-mcp, most recently published on May 15, 2026.
Where can I find the source code for x402-sms-mcp?: The source code for x402-sms-mcp is hosted at github.com/ultrastarz/x402-sms-mcp.

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