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.
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →
Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →
Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →
Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Tools
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 | $0.005 | 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
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →