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Clean web reader for AI agents. Pays $0.002/call in USDC on Base via x402. No API keys.
About
Clean web reader for AI agents. Pays $0.002/call in USDC on Base via x402. No API keys.
Security Report
6.2
Moderate6.2Moderate RiskThis is a well-designed MCP server with strong security practices. The server properly validates the wallet private key, uses environment variables for credential storage (never hardcoded), and implements appropriate input validation via Zod. The x402 payment integration and private key handling follow cryptographic best practices. Minor code quality observations around error handling breadth and response validation do not materially impact security. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
3 files analyzed · 6 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Base-network wallet private key (0x-prefixed, 64 hex chars). Fund the wallet with a small amount of USDC on Base to pay $0.002 per call. Create one at https://app.coinbase.com or any Base-compatible wallet.Required
Environment variable: SKIM_WALLET_PRIVATE_KEY
Optional cap on per-call price in USD (default 0.01). Requests that would cost more than this are rejected without payment.
Environment variable: SKIM_MAX_PRICE_USD
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-jessiejanie-skim402": {
"env": {
"SKIM_MAX_PRICE_USD": "your-skim-max-price-usd-here",
"SKIM_WALLET_PRIVATE_KEY": "your-skim-wallet-private-key-here"
},
"args": [
"-y",
"skim-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
skim-mcp
MCP (Model Context Protocol) server for Skim — clean web reader for AI agents. Pays $0.002 per call in USDC on Base over the x402 protocol. No signup. No API keys. No monthly bills.
Give your agent the ability to read any URL and get back clean, agent-ready Markdown (no nav, no ads, no boilerplate) plus structured metadata (title, byline, published date, language, excerpt).
What you need
- Node.js 18+
- A Base wallet private key with a small amount of USDC in it. A dollar funds ~500 reads. Use a fresh wallet — not your personal one.
Don't have one? Create a key with
cast wallet new(Foundry) or any EVM wallet, then send USDC to it on Base mainnet from Coinbase, an exchange, or another wallet.
Install in Claude Desktop
Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS)
or %APPDATA%\Claude\claude_desktop_config.json (Windows):
{
"mcpServers": {
"skim": {
"command": "npx",
"args": ["-y", "skim-mcp"],
"env": {
"SKIM_WALLET_PRIVATE_KEY": "0xYOUR_BASE_WALLET_PRIVATE_KEY"
}
}
}
}
Restart Claude Desktop. You'll see a new read_url tool. Ask Claude to read
any article and it'll fetch it through Skim and pay automatically.
Install in Cursor
Edit ~/.cursor/mcp.json (or the in-app Settings → MCP panel):
{
"mcpServers": {
"skim": {
"command": "npx",
"args": ["-y", "skim-mcp"],
"env": {
"SKIM_WALLET_PRIVATE_KEY": "0xYOUR_BASE_WALLET_PRIVATE_KEY"
}
}
}
}
Install in Cline / Continue / Zed
All MCP-compatible clients use the same shape. Run the binary as:
npx skim-mcp
with the same SKIM_WALLET_PRIVATE_KEY env var.
Tools
read_url
Reads any URL and returns clean Markdown plus a YAML frontmatter block with metadata.
Input:
{ "url": "https://example.com/article" }
Output (text):
---
title: Example article
byline: Jane Doe
published: 2025-01-15
lang: en
excerpt: A short summary...
---
# Example article
The cleaned article body in Markdown...
Environment variables
| Variable | Required | Default | Notes |
|---|---|---|---|
SKIM_WALLET_PRIVATE_KEY | yes | — | Hex private key for the Base wallet that pays for reads. With or without 0x prefix. |
SKIM_MAX_PRICE_USD | no | 0.01 | Maximum USD per call. Caps how much the wallet will sign for in a single read. Skim is currently $0.002/call, well under this. |
SKIM_API_URL | no | https://skim402.com | Override the API base URL. Mostly for development. |
Security
- Use a dedicated wallet, not your personal one. Fund it with only as much USDC as you're willing to spend.
- The private key never leaves your machine. It's only used locally to sign EIP-3009 payment authorizations consumed by the Skim API.
- Sweep the receive side periodically if you're running Skim yourself.
How it works
- The MCP server receives a
read_urlcall from your AI agent. - It POSTs to
https://skim402.com/api/v1/read. - The server replies
402 Payment Requiredwith x402 payment details. x402-fetchsigns an EIP-3009 USDC transfer authorization using your wallet, attaches it as theX-PAYMENTheader, and retries.- Skim verifies + settles via the Coinbase CDP facilitator and returns the cleaned content.
End-to-end latency is typically <2 seconds.
Links
- Skim — https://skim402.com
- x402 protocol — https://x402.org
- Model Context Protocol — https://modelcontextprotocol.io
License
MIT
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