Summary
Gives Claude tools to check SSL/TLS certificates for any domain. You get validity status, expiration dates, issuer information, certificate chain details, and security grades. Runs as a remote service at ssl-checker.api.klymax402.com and uses x402 micropayments, so you'll need to handle payment tokens for API calls. Useful when you're auditing domains, monitoring certificate health across infrastructure, or need to verify SSL configs without manually opening browsers or running openssl commands. The repository is pretty bare, just the MCP wrapper code without much documentation on the x402 payment flow or available tool schemas.
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Public tool metadata for what this MCP can expose to an agent.
1 tools
security_check_sslUse this when you need to check if a domain's SSL/TLS certificate is valid, when it expires, and who issued it. Returns structured certificate data in JSON. Returns: 1. valid (boolean) 2. expiryDate1 params
Use this when you need to check if a domain's SSL/TLS certificate is valid, when it expires, and who issued it. Returns structured certificate data in JSON. Returns: 1. valid (boolean) 2. expiryDate
Parameters* required
domainstringDomain name to check SSL certificate (e.g. example.com)
SSL Checker API
Check SSL/TLS certificate validity, expiry, issuer, chain details, and security grade for any domain. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"ssl-checker": {
"url": "https://ssl-checker.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://ssl-checker.api.klymax402.com/api/check" \
-H "Content-Type: application/json" \
-d '{"domain":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
security_check_ssl | POST | /api/check | $0.002 | Check SSL certificate for a domain |
security_check_ssl
Use this when you need to check if a domain's SSL/TLS certificate is valid, when it expires, and who issued it. Returns structured certificate data in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
domain | string | yes | Domain name to check SSL certificate (e.g. example.com) |
Example response:
{"domain":"example.com","valid":true,"expiryDate":"2026-12-15","daysRemaining":245,"issuer":{"name":"DigiCert","organization":"DigiCert Inc"},"protocol":"TLSv1.3","securityGrade":"A+"}
When to use: deploying a website, FOR monitoring certificate expiration, auditing security posture, and validating HTTPS setup.
Not for: DNS lookup (use network_lookup_dns), HTTP headers analysis (use network_analyze_headers), port scanning (use network_scan_ports).
Example agent prompts
- "Check if a domain's SSL/TLS certificate is valid, when it expires, and who issued it"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
Featured
Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Give your AI agent a complete email layer—sending, inbound inboxes, and sandbox testing.
Get 4K emails/month free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →