HTTP status codes, explained.
Plus the tools to debug them.
A reference page for every status code from 100 to 511, ten fast developer tools that respect your privacy, and an MCP server so your AI assistant can run the same checks.
Developer tools
No sign-up, no tracking.
Network & HTTP
Inspect any public URL through our edge proxy — nothing is stored.
- URL Status CheckerCheck any URL's status code, response time and headers instantly.
- Redirect Chain TracerFollow a URL through every redirect hop to its final destination.
- Security Headers ScannerScan any site for six critical security headers and get a grade.
- CORS TesterSimulate a CORS preflight and see exactly why it's allowed or blocked.
- DNS LookupResolve A, MX, TXT, CNAME and NS records via DNS-over-HTTPS.
Encode & decode
Decode tokens, convert Base64 and tidy JSON.
Free test endpoints
Public, CORS-open endpoints for test suites, monitors and demos.
Give your AI assistant these tools
The HttpStatus MCP server exposes nine read-only tools — status checks, redirect tracing, security-header and CORS audits, DNS, TLS, JWT decoding and test-endpoint generation — to Claude, Cursor and any MCP client. Remote, OAuth-protected, nothing to install.
Set up the MCP serverCursor / Claude Code config
{
"mcpServers": {
"httpstatus": {
"url": "https://mcp.httpstatus.com/mcp"
}
}
}Endpoint: https://mcp.httpstatus.com/mcp