Explore server capabilities, recorded tools, available client configurations and practical setup considerations. Browse servers by category, or jump to remote servers and official vendor servers.
Servers can appear in several categories when their tools support several tasks. Category counts include these overlaps; the directory total counts each server once.
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Meaning of HTTP 102.
Meaning of HTTP 103.
Meaning of HTTP 200.
Meaning of HTTP 201.
Meaning of HTTP 202.
Meaning of HTTP 204.
Meaning of HTTP 206.
Meaning of HTTP 300.
Meaning of HTTP 301.
Meaning of HTTP 302.
Meaning of HTTP 303.
Meaning of HTTP 304.
Meaning of HTTP 307.
Meaning of HTTP 308.
Meaning of HTTP 400.
Meaning of HTTP 401.
Free MCP troubleshooting-preview tools; purchases stay human-directed.
Meaning of HTTP 403.
Meaning of HTTP 404.
Meaning of HTTP 405.
Meaning of HTTP 406.
Meaning of HTTP 408.
Meaning of HTTP 409.
Meaning of HTTP 410.
Meaning of HTTP 412.
Meaning of HTTP 413.
Meaning of HTTP 414.
Meaning of HTTP 415.
Meaning of HTTP 418.
Meaning of HTTP 422.
Meaning of HTTP 425.
Meaning of HTTP 426.
Meaning of HTTP 428.
Meaning of HTTP 429.
Meaning of HTTP 431.
Meaning of HTTP 451.
Meaning of HTTP 500.
Meaning of HTTP 501.
Meaning of HTTP 502.
Meaning of HTTP 503.
Meaning of HTTP 504.
Meaning of HTTP 505.
Meaning of HTTP 507.
Meaning of HTTP 511.
x402 micropayments for AI agents — credits-based, no wallets, no blockchain.
HTTP request testing from HTTPBin. No key required.
HTTP Cat MCP — wraps http.cat (free, no auth)
HTTP-date IMF-fixdate shape, value discarded
Analyze HTTP response headers -- security score, HSTS/CSP check, server detection, caching config. Score 0-100. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
http/https scheme check, URL discarded
Fetch a URL and report its status, headers, and size. Runs locally.
HTTP reason-phrase catalog size
Send one HTTP request, or one per row of a dataset, CSV or Google Sheet, and get the response back
https://doi.org/ URL shape, value discarded
Runnable example of node-candidate-mcp-server.
Remote MCP server (SEE + Streamable HTTP) implementing the MCP spec's authorization extension. Use directly from your agents, or from Cursor / Claude
HTTP status code reference MCP.
24 AI-callable tools for API testing, mocking, monitoring, security, and automation — directly from your AI assistant.
Short catalog of common HTTP status codes.
HTTP status class 1xx-5xx