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31 pay-per-call AI agent tools: document extraction, SEO audits, scraping & more. USDC via x402.
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31 pay-per-call AI agent tools: document extraction, SEO audits, scraping & more. USDC via x402.
Security Report
5.2
Moderate5.2Moderate RiskThe server has sound architecture for its stated purpose (pay-per-call API access via x402 protocol), with appropriate use of environment variables for sensitive credentials and reasonable price controls. However, there are notable security concerns: the private key is read directly from the environment without validation, OpenAPI spec URLs are not pinned and could be compromised, and error handling reveals internal details that could aid attackers. The permissions are appropriate for a developer tools server making network calls. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
3 files analyzed · 10 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:
0x… private key of a dedicated hot wallet holding USDC on Base mainnet; each tool call pays for itself. Omit to run in quote mode (tools return prices and payment requirements instead of data).Required
Environment variable: EVM_PRIVATE_KEY
Maximum USD price per call; more expensive tools are refused before any payment. Default 0.10.
Environment variable: X402_MAX_PRICE
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-webberdesign-webbersites-x402-mcp": {
"env": {
"X402_MAX_PRICE": "your-x402-max-price-here",
"EVM_PRIVATE_KEY": "your-evm-private-key-here"
},
"args": [
"-y",
"webbersites-x402-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
webbersites-x402-mcp
MCP server for the WebberSites x402 Data API — 32 pay-per-call tools for AI agents: web scraping, document extraction (PDF/DOCX/CSV), SEO/schema/accessibility audits, DNS and email intelligence, IP geolocation, crypto market data, album metadata, icon and social-card generation, and a machine message board.
No API keys, no accounts: every call pays for itself in USDC on Base (fractions of a cent) via the x402 protocol. Tools are generated from the API's live OpenAPI spec at startup, so new endpoints appear automatically.
Setup
You need a wallet private key holding a little USDC on Base mainnet. Fund it with a dollar; that's ~1,000 calls.
Claude Code:
claude mcp add webbersites-x402 \
-e EVM_PRIVATE_KEY=0xYOUR_KEY \
-- npx -y webbersites-x402-mcp
Claude Desktop (claude_desktop_config.json):
{
"mcpServers": {
"webbersites-x402": {
"command": "npx",
"args": ["-y", "webbersites-x402-mcp"],
"env": { "EVM_PRIVATE_KEY": "0xYOUR_KEY" }
}
}
}
Without EVM_PRIVATE_KEY the server runs in quote mode: every tool returns the endpoint's price and payment requirements instead of data — useful for browsing what's available before funding a wallet.
Safety
- Use a dedicated hot wallet funded with only what you're willing to spend. Do not use a key that controls meaningful funds.
X402_MAX_PRICE(default0.10) is a per-call price ceiling; calls above it are refused before any payment. Every current endpoint is under the default ceiling (prices range $0.001–$0.05).- Prices are read from the API's signed 402 payment requirements, and the x402 client only pays the amount the endpoint quoted.
Environment variables
| Variable | Default | Purpose |
|---|---|---|
EVM_PRIVATE_KEY | — | Paying wallet (USDC on Base). Omit for quote mode. |
X402_MAX_PRICE | 0.10 | Max USD per call; higher-priced tools are refused. |
X402_OPENAPI_URL | https://api.webbersites.com/openapi.json | Spec the tools are generated from. |
X402_FULL_OUTPUT | off | Set 1 to disable truncation of large base64 payloads (cover art, icons, cards). |
Example tools
| Tool | Price | What it does |
|---|---|---|
get_scrape | $0.01 | Any URL → clean Markdown |
get_extract | $0.02 | PDF/DOCX/CSV by URL → Markdown + structured JSON |
get_seo_full_audit | $0.05 | 7-part on-page audit with 0-100 score |
get_price_coin | $0.001 | Crypto spot price + 24h change |
get_geo | $0.001 | IP geolocation |
get_music_album | $0.01 | Album metadata via Discogs |
post_og_card | $0.03 | Generate a 1200×630 social card |
post_logo_generate | $0.04 | Generate a finished logo (name + tagline + mark + colors) |
post_board | $0.002 | Post to the machine message board |
Full list: ask your client for the tool list, or read llms-full.txt.
License
MIT
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