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Breach detection, SIM swap, domain lookalikes, OAuth watchlist, URL scanning. Subscription or PAYG.
About
Breach detection, SIM swap, domain lookalikes, OAuth watchlist, URL scanning. Subscription or PAYG.
Security Report
4.8
Use Caution4.8High RiskThis MCP server implements security intelligence tools with proper authentication and authorization controls. The code is clean, well-documented, and handles multiple authentication modes (subscription via API key, pay-as-you-go via x402 payment proof, and discovery mode). Permissions are appropriate for its purpose as a developer security tool making HTTP API calls. No malicious patterns, credential hardcoding, or dangerous code execution issues detected. Supply chain analysis found 3 known vulnerabilities in dependencies (0 critical, 3 high severity). Package verification found 1 issue.
4 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.
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:
API Gateway base URL — https://xhh3tfrhng.execute-api.us-east-1.amazonaws.com/prod
Environment variable: RELAYSHIELD_API_URL
RapidAPI subscription key (subscription mode — all 7 tools available)Required
Environment variable: RELAYSHIELD_API_KEY
x402 payment proof — USDC on Base (pay-as-you-go mode — 4 tools, no API key needed)Required
Environment variable: RELAYSHIELD_X_PAYMENT
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-nzdsf2-gif-relayshield-mcp": {
"env": {
"RELAYSHIELD_API_KEY": "your-relayshield-api-key-here",
"RELAYSHIELD_API_URL": "your-relayshield-api-url-here",
"RELAYSHIELD_X_PAYMENT": "your-relayshield-x-payment-here"
},
"args": [
"relayshield-mcp"
],
"command": "uvx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
relayshield-mcp
mcp-name: io.github.nzdsf2-gif/relayshield-mcp
RelayShield security intelligence as an MCP server — plug breach detection, SIM swap detection, domain lookalike monitoring, OAuth supply chain watchlist, and URL/file scanning directly into Claude and any MCP-compatible AI agent.
Tools
| Tool | What it does | PAYG price |
|---|---|---|
check_breach | Email breach lookup — 13 billion+ records via HIBP | $0.10 USDC |
check_sim_swap | SIM swap / eSIM detection via live carrier data | $0.25 USDC |
check_domain_lookalikes | Typosquat and lookalike domain detection with cert transparency | $0.50 USDC |
check_oauth_watchlist | OAuth supply chain breach check — Slack, GitHub, Notion, Zapier, and more | $0.15 USDC |
scan_url | URL malware/phishing scan across 70+ engines (async) | subscription only |
scan_file | Binary malware scan across 70+ AV engines (async) | subscription only |
check_scan_result | Poll for verdict after scan_url / scan_file | free |
Access modes
Subscription — API key from RapidAPI. All 7 tools available. Free tier: 100 calls/month. Paid tiers from $29/month.
Pay-as-you-go — No API key needed. Pay per check in USDC on Base (x402 protocol). Set RELAYSHIELD_X_PAYMENT with your payment proof. 4 tools available ($0.10–$0.50/check). Call a tool with no payment set to receive pricing and payment instructions.
Discovery — Set neither key nor payment. Tool calls return payment requirements and a subscription link.
Install
pip install relayshield-mcp
Or run without installing:
uvx relayshield-mcp
Configure Claude Desktop
Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):
Subscription (RapidAPI key):
{
"mcpServers": {
"relayshield": {
"command": "relayshield-mcp",
"env": {
"RELAYSHIELD_API_URL": "https://xhh3tfrhng.execute-api.us-east-1.amazonaws.com/prod",
"RELAYSHIELD_API_KEY": "your-rapidapi-key-here"
}
}
}
}
Pay-as-you-go (x402 USDC on Base):
{
"mcpServers": {
"relayshield": {
"command": "relayshield-mcp",
"env": {
"RELAYSHIELD_API_URL": "https://xhh3tfrhng.execute-api.us-east-1.amazonaws.com/prod",
"RELAYSHIELD_X_PAYMENT": "your-x402-payment-proof-here"
}
}
}
}
Quit and relaunch Claude Desktop after editing.
Configure Claude Code (CLI)
claude mcp add relayshield \
--command relayshield-mcp \
--env RELAYSHIELD_API_URL=https://xhh3tfrhng.execute-api.us-east-1.amazonaws.com/prod \
--env RELAYSHIELD_API_KEY=your-rapidapi-key-here
Usage examples
Once configured, ask Claude:
Check whether user@example.com has been breached.
Has there been a SIM swap on +14155551234?
Check acme.com for lookalike domains.
Are any OAuth apps connected to user@example.com in a recent breach?
Scan this URL for malware: https://suspicious-link.example.com
For URL and file scans, Claude automatically polls check_scan_result every 5 seconds until the verdict is ready.
Environment variables
| Variable | Description |
|---|---|
RELAYSHIELD_API_URL | API Gateway base URL (required) |
RELAYSHIELD_API_KEY | RapidAPI subscription key (subscription mode) |
RELAYSHIELD_X_PAYMENT | x402 payment proof — USDC on Base (pay-as-you-go mode) |
Set RELAYSHIELD_API_KEY or RELAYSHIELD_X_PAYMENT — not both. API key takes priority if both are set.
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