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Trust & reliability scores for x402 endpoints: free ecosystem stats, paid per-endpoint scores.
Trust & reliability scores for x402 endpoints: free ecosystem stats, paid per-endpoint scores.
Well-structured MCP server with proper authentication for paid operations and appropriate permission scoping. The server uses environment variables for sensitive credentials, implements payment authorization via EIP-3009 signatures (not storing keys), and has clear separation between free and paid endpoints. Minor code quality improvements around error handling and input validation, but no security vulnerabilities. Supply chain analysis found 2 known vulnerabilities in dependencies (2 critical, 0 high severity). Package verification found 1 issue.
5 files analyzed · 8 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
This plugin requests these system permissions. Most are normal for its category.
Set these up before or after installing:
Environment variable: X402_PRIVATE_KEY
Environment variable: X402_MAX_USD
Environment variable: X402_TRUST_API_BASE
Environment variable: X402_TIMEOUT_MS
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-jonasfuchss-x402-trust-mcp": {
"env": {
"X402_MAX_USD": "your-x402-max-usd-here",
"X402_TIMEOUT_MS": "your-x402-timeout-ms-here",
"X402_PRIVATE_KEY": "your-x402-private-key-here",
"X402_TRUST_API_BASE": "your-x402-trust-api-base-here"
},
"args": [
"-y",
"x402-trust-mcp"
],
"command": "npx"
}
}
}From the project's GitHub README.
An MCP server that lets your agent check the trust & reliability of x402 endpoints before paying them.
Backed by x402.fuchss.app, which monitors the entire x402 ecosystem on Base 24/7: uptime probes, 402-envelope spec compliance, advertised-price history, and real on-chain USDC settlement volume per endpoint.
Agents increasingly pay x402 endpoints autonomously. But ~⅔ of listed x402 endpoints are unreachable and ~⅓ of the reachable ones serve non-compliant payment envelopes. Before your agent sends USDC to an unknown endpoint, ask: is it alive, compliant, and does anyone actually pay it?
| Tool | Cost | Description |
|---|---|---|
x402_ecosystem_stats | free | Aggregate state of the x402 ecosystem (listings, reachability, compliance, 30d settlement volume). |
x402_trust_leaderboard | free | Top-25 most trustworthy x402 endpoints. |
x402_trust_score | paid | Trust score (0-100, grade A-F) for a specific endpoint, with full breakdown + flags. |
x402_endpoint_history | paid | Observation time-series for a specific endpoint (listings, price changes, probes). |
Paid tools cost a few tenths of a cent, charged over x402 (USDC on Base). If you
set X402_PRIVATE_KEY, the server auto-pays within your X402_MAX_USD
limit; otherwise it returns the price quote for your host to pay.
Add to your MCP client config (e.g. Claude Desktop claude_desktop_config.json):
{
"mcpServers": {
"x402-trust": {
"command": "npx",
"args": ["-y", "x402-trust-mcp"]
}
}
}
To enable autonomous payment for the paid tools, add a funded Base USDC wallet:
{
"mcpServers": {
"x402-trust": {
"command": "npx",
"args": ["-y", "x402-trust-mcp"],
"env": {
"X402_PRIVATE_KEY": "0xYOUR_BASE_WALLET_KEY",
"X402_MAX_USD": "0.05"
}
}
}
}
| Var | Default | Description |
|---|---|---|
X402_TRUST_API_BASE | https://x402.fuchss.app | API base URL. |
X402_PRIVATE_KEY | (unset) | Base wallet private key (0x…). Enables auto-pay for paid tools. |
X402_MAX_USD | 0.05 | Per-call auto-pay ceiling. |
X402_TIMEOUT_MS | 20000 | Request timeout. |
The free tools work with no configuration at all.
X402_PRIVATE_KEY is a hot wallet — fund it with only what you're willing to
spend on trust lookups. The key never leaves your machine; it signs EIP-3009
payment authorizations locally.
MIT
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