Endpoint Probe

Probe a base URL to discover its API surface: type, auth, endpoints, rate limits, CORS, and server fingerprint.

When to Use

• User gives you a base URL and asks "what API is available?" or "what endpoints does this have?"
• You need to understand an undocumented or partially-documented API before building an integration
• User asks "how does this API authenticate?" or "what auth does this endpoint need?"
• You're evaluating a third-party service and need to map its API surface
• User says "discover", "probe", "explore", or "recon" an API endpoint
• User wants to know what tools an MCP server provides before configuring it
• User asks "what does this MCP server offer?" or "what tools does MCP server X have?"

Don't use for:

• Scraping HTML page content (use website-scraping)
• QA testing of known functionality (use a QA/testing skill)
• Configuring MCP servers (use an MCP configuration skill) — this skill discovers MCP server surfaces, it doesn't configure them
• Monitoring an API over time (this is a one-shot discovery tool)