Metlo API Security

What it does

Metlo's open source API security platform lets you Discover, Inventory, Test, and Protect your APIs. Metlo observes your traffic to automatically discover and report API attacks and leaky APIs in real-time so you can block them before a breach occurs.

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  Metlo (YC S21) – An Open Source API Security Tool2022 · github.com · ▲34

  Metlo - An Open Source API Security Tool Hey folks! Excited to share what we’ve been working on for the last couple months. Metlo is a self hosted, open source first API security platform that inventories, tests and protects your API endpoints: - We inventory your endpoints by scanning API traffic and detecting all your endpoints along with the sensitive data they contain. - We generate information your security team may find useful like Open API Specs and risk scores for each endpoint. - After this we discover vulnerabilities like unauthenticated endpoints returning sensitive data or…

• QC
  Quickly Create Security Tests for All Your APIs (YC S21)2023 · ▲15

  Hey everyone, excited to share something we’ve been working on the last few months! For context, Metlo is an open source API Security tool[0] we launched here on HN a couple months ago[1]. After working with a few customers over the last couple months, we realized there was a gap in other API testing solutions; especially when it comes to writing security tests. So we decided to completely gut and revamp our testing product - sharing that with you all today! Most Automated API Scanners only find generic vulnerabilities like misconfigured HSTS/CORS Headers and miss vulns specific to your…

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  API RadarJan 2026 · apiradar.live · ▲77

  We built API Radar to track exposed API keys from OpenAI, Claude, Gemini, and other major providers—in real time—from public GitHub repositories. Why? Leaked AI keys are everywhere. They power bots, cost companies thousands, and even expose user data. But no one had a clean dashboard to see the leaks as they happen — until now. What you’ll find: Full redacted + raw API key leaks Real-time feed of exposed repos Leaderboards by author, repo, and provider Filtering by provider (OpenAI, Claude, Gemini, etc.) Timeline of key exposure trends Built for security researchers, devs, and AI companies…

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