Is io.github.fernsugi/x402-api safe to use?

io.github.fernsugi/x402-api has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.fernsugi/x402-api?

io.github.fernsugi/x402-api supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.fernsugi/x402-api do?

io.github.fernsugi/x402-api provides 8 tools: get_crypto_prices, get_gas_prices, get_dex_quotes, scan_token, track_whales and 3 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.fernsugi/x402-api?

io.github.fernsugi/x402-api is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is io.github.fernsugi/x402-api actively maintained?

io.github.fernsugi/x402-api is recently maintained — last commit was 68 days ago.

io.github.fernsugi/x402-api

@x402-api/mcp-server

DeFi data API for AI agents — pay-per-call via x402/USDC on Base

16/wk 8 tools GitHub npm

No known CVEs

No license

Maintained

Last commit 68d ago

Works with most clients

Transport: stdio, sse, http

8 tools · ~629 tok

Grade B · 0.3% of 200K ctx

Edit this pageView history

Finance

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "x402-api": {
      "args": [
        "@x402-api/mcp-server"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-fernsugi-x402-api)](https://mcppedia.org/s/io-github-fernsugi-x402-api)

Read me

What io.github.fernsugi/x402-api does

MCP server that gives Claude, ChatGPT, and any MCP-compatible AI agent access to pay-per-call crypto/DeFi data via the x402 protocol.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@x402-api/mcp-server' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

78/100across 5 weighted dimensions

How we score →

0255075100

−22

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @x402-api/mcp-server against OSV.dev.

Inventory

Tools (8)

Click any tool to inspect its schema.

~629 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.fernsugi/x402-api safe to use?: io.github.fernsugi/x402-api has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.fernsugi/x402-api?: io.github.fernsugi/x402-api supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.fernsugi/x402-api do?: io.github.fernsugi/x402-api provides 8 tools: get_crypto_prices, get_gas_prices, get_dex_quotes, scan_token, track_whales and 3 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.fernsugi/x402-api?: io.github.fernsugi/x402-api is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.fernsugi/x402-api actively maintained?: io.github.fernsugi/x402-api is recently maintained — last commit was 68 days ago.

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MCP Security Weekly

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Finance

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "x402-api": {
      "args": [
        "@x402-api/mcp-server"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-fernsugi-x402-api)](https://mcppedia.org/s/io-github-fernsugi-x402-api)

Read me

What io.github.fernsugi/x402-api does

MCP server that gives Claude, ChatGPT, and any MCP-compatible AI agent access to pay-per-call crypto/DeFi data via the x402 protocol.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@x402-api/mcp-server' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

@x402-api/mcp-server

MCP server that gives Claude, ChatGPT, and any MCP-compatible AI agent access to pay-per-call crypto/DeFi data via the x402 protocol.

8 tools. No API keys. AI agents pay USDC micropayments on Base, per request.

  ██╗  ██╗██╗  ██╗ ██████╗ ██████╗
   ╚██╗██╔╝██║  ██║██╔═══██╗╚════██╗
    ╚███╔╝ ███████║██║   ██║ █████╔╝
    ██╔██╗ ╚════██║██║   ██║██╔═══╝
   ██╔╝ ██╗     ██║╚██████╔╝███████╗
   ╚═╝  ╚═╝     ╚═╝ ╚═════╝ ╚══════╝

Tools

Tool	API Endpoint	Cost	Description
`get_crypto_prices`	`GET /api/price-feed`	0.001 USDC	BTC/ETH/SOL + top 24h movers
`get_gas_prices`	`GET /api/gas-tracker`	0.001 USDC	Multi-chain gas (ETH, Base, Polygon, Arbitrum)
`get_dex_quotes`	`GET /api/dex-quotes`	0.002 USDC	Swap quotes: Uniswap, SushiSwap, 1inch
`scan_token`	`GET /api/token-scanner`	0.003 USDC	Token security scan + rug-pull detection
`track_whales`	`GET /api/whale-tracker`	0.005 USDC	Holder concentration + whale alerts
`scan_yields`	`GET /api/yield-scanner`	0.005 USDC	DeFi yields: Aave, Compound, Morpho, Lido, Pendle
`get_funding_rates`	`GET /api/funding-rates`	0.008 USDC	Perp funding rates across 6 venues
`profile_wallet`	`GET /api/wallet-profiler`	0.008 USDC	Full wallet portfolio + risk profile

Quick Start

Option A: Inspect mode (no payment needed)

Just run it — any 402 responses will return human-readable payment instructions:

npx @x402-api/mcp-server

Claude will tell you what's needed when a tool requires payment.

Option B: Auto-pay mode (fully autonomous)

Install optional payment deps and set your wallet key:

npm install -g @x402-api/mcp-server
npm install -g x402-fetch viem
export X402_WALLET_PRIVATE_KEY=0x<your_private_key>
x402-api-mcp

The server will auto-pay 402 responses using USDC on Base. Make sure your wallet has USDC on Base mainnet.

Claude Desktop Integration

Add to your claude_desktop_config.json:

Without auto-pay (inspect mode)

{
  "mcpServers": {
    "x402-api": {
      "command": "npx",
      "args": ["@x402-api/mcp-server"]
    }
  }
}

With auto-pay

{
  "mcpServers": {
    "x402-api": {
      "command": "npx",
      "args": ["@x402-api/mcp-server"],
      "env": {
        "X402_WALLET_PRIVATE_KEY": "0x<your_private_key>"
      }
    }
  }
}

Config file location:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json

Environment Variables

Variable	Required	Description
`X402_WALLET_PRIVATE_KEY`	Optional	Private key for auto-pay (e.g. `0x...`). If set, x402-fetch handles payments automatically.
`X402_API_BASE_URL`	Optional	Override API URL (default: `https://x402-api.fly.dev`)

How x402 Payments Work

This API uses the x402 protocol — HTTP 402 Payment Required:

Agent calls tool → MCP server makes API request
Server returns 402 with payment details (amount, USDC address, Base network)
Auto-pay mode: x402-fetch signs and submits payment, retries request automatically
Manual mode: MCP returns 402 details so user/agent can arrange payment

Payment details:

Token: USDC on Base mainnet
Address: 0x60264c480b67adb557efEd22Cf0e7ceA792DefB7
Chain: Base (chain ID 8453)
Amount: 0.001–0.008 USDC per call (< 1 cent USD)

Tool Reference

`get_crypto_prices`

No parameters. Returns current prices for BTC, ETH, SOL + top 24h movers.

Cost: 0.00

... [View full README on GitHub](https://github.com/fernsugi/x402-api-mcp-server#readme)

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

78/100across 5 weighted dimensions

How we score →

0255075100

−22

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @x402-api/mcp-server against OSV.dev.

Inventory

Tools (8)

Click any tool to inspect its schema.

~629 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.fernsugi/x402-api safe to use?: io.github.fernsugi/x402-api has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.fernsugi/x402-api?: io.github.fernsugi/x402-api supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.fernsugi/x402-api do?: io.github.fernsugi/x402-api provides 8 tools: get_crypto_prices, get_gas_prices, get_dex_quotes, scan_token, track_whales and 3 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.fernsugi/x402-api?: io.github.fernsugi/x402-api is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.fernsugi/x402-api actively maintained?: io.github.fernsugi/x402-api is recently maintained — last commit was 68 days ago.