Who maintains x402 Universal Payer?

x402 Universal Payer is maintained by nirholas, which publishes 87 MCP servers (137 total versions) tracked on MCP Toplist.

Is x402 Universal Payer listed on the Official MCP Registry?

Yes — x402 Universal Payer is listed on the Official MCP Registry.

How many versions does x402 Universal Payer have?

MCP Toplist tracks 2 versions of x402 Universal Payer, most recently published on Aug 19, 2026.

Where can I find the source code for x402 Universal Payer?

The source code for x402 Universal Payer is hosted at github.com/nirholas/three.ws.

SERVER

x402 Universal Payer

Rank #6,686

io.github.nirholas/x402-bridge

Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.

2 versions

107 GitHub stars

by nirholas (87 servers)View repository ↗

First listed

Jun 13, 2026

Last publish date

Aug 19, 2026

OVERVIEW

x402 Universal Payer is a Model Context Protocol (MCP) server published by nirholas. It ranks #6,686 of 115,460 servers tracked on MCP Toplist, and its repository has 107 GitHub stars. x402 Universal Payer is listed on Official MCP, with 2 tracked versions. It was first listed on Jun 13, 2026 and most recently updated on Aug 19, 2026.

STANDING

#6,686of 115,460 tracked serversTop 10%

Ranks ahead of 108,774 of 115,460 servers on MCP Toplist.

Recent momentum

+21GitHub stars since Jul 20 (+24%)

CONNECT

Use x402 Universal Payer

No setupRuns out of the box

No credentials or required configuration declared — add it to your MCP client and go.

npm package

claude mcp add x402-bridge -e "MCP_BRIDGE_EVM_PRIVATE_KEY=<your MCP_BRIDGE_EVM_PRIVATE_KEY>" -e "MCP_BRIDGE_SVM_PRIVATE_KEY=<your MCP_BRIDGE_SVM_PRIVATE_KEY>" -e "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC=<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>" -e "MCP_BRIDGE_MAX_TOTAL_ATOMIC=<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>" -e "MCP_BRIDGE_ALLOWED_PAYTO=<your MCP_BRIDGE_ALLOWED_PAYTO>" -e "MCP_BRIDGE_ALLOWED_HOSTS=<your MCP_BRIDGE_ALLOWED_HOSTS>" -e "MCP_BRIDGE_ALLOW_HTTP=<your MCP_BRIDGE_ALLOW_HTTP>" -e "MCP_BRIDGE_DISCOVER_LIMIT=<your MCP_BRIDGE_DISCOVER_LIMIT>" -e "MCP_BRIDGE_BAZAAR_URL=<your MCP_BRIDGE_BAZAAR_URL>" -e "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER=<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>" -e "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC=<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>" -e "X402_MCP_BRIDGE_CHANNELS_DIR=<your X402_MCP_BRIDGE_CHANNELS_DIR>" -e "RPC_URL_8453=<your RPC_URL_8453>" -- npx -y @three-ws/mcp-bridge

Replace each placeholder with your own value before saving.

npm package

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

[mcp_servers.x402-bridge.env]
MCP_BRIDGE_EVM_PRIVATE_KEY = "<your MCP_BRIDGE_EVM_PRIVATE_KEY>"
MCP_BRIDGE_SVM_PRIVATE_KEY = "<your MCP_BRIDGE_SVM_PRIVATE_KEY>"
MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC = "<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>"
MCP_BRIDGE_MAX_TOTAL_ATOMIC = "<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>"
MCP_BRIDGE_ALLOWED_PAYTO = "<your MCP_BRIDGE_ALLOWED_PAYTO>"
MCP_BRIDGE_ALLOWED_HOSTS = "<your MCP_BRIDGE_ALLOWED_HOSTS>"
MCP_BRIDGE_ALLOW_HTTP = "<your MCP_BRIDGE_ALLOW_HTTP>"
MCP_BRIDGE_DISCOVER_LIMIT = "<your MCP_BRIDGE_DISCOVER_LIMIT>"
MCP_BRIDGE_BAZAAR_URL = "<your MCP_BRIDGE_BAZAAR_URL>"
MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER = "<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>"
MCP_BRIDGE_MAX_DEPOSIT_ATOMIC = "<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>"
X402_MCP_BRIDGE_CHANNELS_DIR = "<your X402_MCP_BRIDGE_CHANNELS_DIR>"
RPC_URL_8453 = "<your RPC_URL_8453>"

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

npm package

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/mcp-bridge"
      ],
      "env": {
        "MCP_BRIDGE_EVM_PRIVATE_KEY": "<your MCP_BRIDGE_EVM_PRIVATE_KEY>",
        "MCP_BRIDGE_SVM_PRIVATE_KEY": "<your MCP_BRIDGE_SVM_PRIVATE_KEY>",
        "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>",
        "MCP_BRIDGE_MAX_TOTAL_ATOMIC": "<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>",
        "MCP_BRIDGE_ALLOWED_PAYTO": "<your MCP_BRIDGE_ALLOWED_PAYTO>",
        "MCP_BRIDGE_ALLOWED_HOSTS": "<your MCP_BRIDGE_ALLOWED_HOSTS>",
        "MCP_BRIDGE_ALLOW_HTTP": "<your MCP_BRIDGE_ALLOW_HTTP>",
        "MCP_BRIDGE_DISCOVER_LIMIT": "<your MCP_BRIDGE_DISCOVER_LIMIT>",
        "MCP_BRIDGE_BAZAAR_URL": "<your MCP_BRIDGE_BAZAAR_URL>",
        "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>",
        "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>",
        "X402_MCP_BRIDGE_CHANNELS_DIR": "<your X402_MCP_BRIDGE_CHANNELS_DIR>",
        "RPC_URL_8453": "<your RPC_URL_8453>"
      }
    }
  }
}

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

npm package

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/mcp-bridge"
      ],
      "env": {
        "MCP_BRIDGE_EVM_PRIVATE_KEY": "<your MCP_BRIDGE_EVM_PRIVATE_KEY>",
        "MCP_BRIDGE_SVM_PRIVATE_KEY": "<your MCP_BRIDGE_SVM_PRIVATE_KEY>",
        "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>",
        "MCP_BRIDGE_MAX_TOTAL_ATOMIC": "<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>",
        "MCP_BRIDGE_ALLOWED_PAYTO": "<your MCP_BRIDGE_ALLOWED_PAYTO>",
        "MCP_BRIDGE_ALLOWED_HOSTS": "<your MCP_BRIDGE_ALLOWED_HOSTS>",
        "MCP_BRIDGE_ALLOW_HTTP": "<your MCP_BRIDGE_ALLOW_HTTP>",
        "MCP_BRIDGE_DISCOVER_LIMIT": "<your MCP_BRIDGE_DISCOVER_LIMIT>",
        "MCP_BRIDGE_BAZAAR_URL": "<your MCP_BRIDGE_BAZAAR_URL>",
        "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>",
        "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>",
        "X402_MCP_BRIDGE_CHANNELS_DIR": "<your X402_MCP_BRIDGE_CHANNELS_DIR>",
        "RPC_URL_8453": "<your RPC_URL_8453>"
      }
    }
  }
}

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-bridge": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/mcp-bridge"
      ],
      "env": {
        "MCP_BRIDGE_EVM_PRIVATE_KEY": "<your MCP_BRIDGE_EVM_PRIVATE_KEY>",
        "MCP_BRIDGE_SVM_PRIVATE_KEY": "<your MCP_BRIDGE_SVM_PRIVATE_KEY>",
        "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>",
        "MCP_BRIDGE_MAX_TOTAL_ATOMIC": "<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>",
        "MCP_BRIDGE_ALLOWED_PAYTO": "<your MCP_BRIDGE_ALLOWED_PAYTO>",
        "MCP_BRIDGE_ALLOWED_HOSTS": "<your MCP_BRIDGE_ALLOWED_HOSTS>",
        "MCP_BRIDGE_ALLOW_HTTP": "<your MCP_BRIDGE_ALLOW_HTTP>",
        "MCP_BRIDGE_DISCOVER_LIMIT": "<your MCP_BRIDGE_DISCOVER_LIMIT>",
        "MCP_BRIDGE_BAZAAR_URL": "<your MCP_BRIDGE_BAZAAR_URL>",
        "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>",
        "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>",
        "X402_MCP_BRIDGE_CHANNELS_DIR": "<your X402_MCP_BRIDGE_CHANNELS_DIR>",
        "RPC_URL_8453": "<your RPC_URL_8453>"
      }
    }
  }
}

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

npm package

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/mcp-bridge"
      ],
      "env": {
        "MCP_BRIDGE_EVM_PRIVATE_KEY": "<your MCP_BRIDGE_EVM_PRIVATE_KEY>",
        "MCP_BRIDGE_SVM_PRIVATE_KEY": "<your MCP_BRIDGE_SVM_PRIVATE_KEY>",
        "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>",
        "MCP_BRIDGE_MAX_TOTAL_ATOMIC": "<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>",
        "MCP_BRIDGE_ALLOWED_PAYTO": "<your MCP_BRIDGE_ALLOWED_PAYTO>",
        "MCP_BRIDGE_ALLOWED_HOSTS": "<your MCP_BRIDGE_ALLOWED_HOSTS>",
        "MCP_BRIDGE_ALLOW_HTTP": "<your MCP_BRIDGE_ALLOW_HTTP>",
        "MCP_BRIDGE_DISCOVER_LIMIT": "<your MCP_BRIDGE_DISCOVER_LIMIT>",
        "MCP_BRIDGE_BAZAAR_URL": "<your MCP_BRIDGE_BAZAAR_URL>",
        "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>",
        "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>",
        "X402_MCP_BRIDGE_CHANNELS_DIR": "<your X402_MCP_BRIDGE_CHANNELS_DIR>",
        "RPC_URL_8453": "<your RPC_URL_8453>"
      }
    }
  }
}

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

npm package

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/mcp-bridge"
      ],
      "env": {
        "MCP_BRIDGE_EVM_PRIVATE_KEY": "<your MCP_BRIDGE_EVM_PRIVATE_KEY>",
        "MCP_BRIDGE_SVM_PRIVATE_KEY": "<your MCP_BRIDGE_SVM_PRIVATE_KEY>",
        "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC": "<your MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC>",
        "MCP_BRIDGE_MAX_TOTAL_ATOMIC": "<your MCP_BRIDGE_MAX_TOTAL_ATOMIC>",
        "MCP_BRIDGE_ALLOWED_PAYTO": "<your MCP_BRIDGE_ALLOWED_PAYTO>",
        "MCP_BRIDGE_ALLOWED_HOSTS": "<your MCP_BRIDGE_ALLOWED_HOSTS>",
        "MCP_BRIDGE_ALLOW_HTTP": "<your MCP_BRIDGE_ALLOW_HTTP>",
        "MCP_BRIDGE_DISCOVER_LIMIT": "<your MCP_BRIDGE_DISCOVER_LIMIT>",
        "MCP_BRIDGE_BAZAAR_URL": "<your MCP_BRIDGE_BAZAAR_URL>",
        "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER": "<your MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER>",
        "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC": "<your MCP_BRIDGE_MAX_DEPOSIT_ATOMIC>",
        "X402_MCP_BRIDGE_CHANNELS_DIR": "<your X402_MCP_BRIDGE_CHANNELS_DIR>",
        "RPC_URL_8453": "<your RPC_URL_8453>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

BADGE

Show your rank

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Markdown

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

HTML

<a href="https://mcptoplist.com/server/io.github.nirholas%2Fx402-bridge"><img src="https://mcptoplist.com/badge/io.github.nirholas%2Fx402-bridge.svg" alt="MCP Toplist: Top 10% of 115,460" /></a>

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

REGISTRIES

Listed on 1 registry

Official MCP

ORGANIZATION

nirholas

Organization

nirholas

Servers in org

Versions across org

137

Other servers by nirholas

View all nirholas servers →

VERSIONS

Available versions (2)

Version	Published
1.0.2	Aug 19, 2026
1.0.0	Jun 13, 2026

FAQ

Frequently asked questions

Who maintains x402 Universal Payer?: x402 Universal Payer is maintained by nirholas, which publishes 87 MCP servers (137 total versions) tracked on MCP Toplist.
Is x402 Universal Payer listed on the Official MCP Registry?: Yes — x402 Universal Payer is listed on the Official MCP Registry.
How many versions does x402 Universal Payer have?: MCP Toplist tracks 2 versions of x402 Universal Payer, most recently published on Aug 19, 2026.
Where can I find the source code for x402 Universal Payer?: The source code for x402 Universal Payer is hosted at github.com/nirholas/three.ws.

EXPLORE

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