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7/1/2026
I Built a Free API That Detects Phishing Sites Using AI Vision - And It Catches Prompt Injection Too

I Built a Free API That Detects Phishing Sites Using AI Vision - And It Catches Prompt Injection Too

Short summary

PhishVision is a free REST API powered by GPT-4o that detects phishing sites and prompt injection attacks missed by traditional URL reputation databases. It captures full-page screenshots and extracts all visible and hidden text (including invisible payloads targeting AI agents) to analyze pages exactly as a human would. The complete source code is open-source on GitHub and the API is available free on RapidAPI—no credit card required.

  • •Uses AI vision to detect phishing and prompt injection attacks that URL reputation databases miss
  • •Captures full-page content and extracts hidden text invisible to humans but targeting AI agents
  • •Open-source tool with free RapidAPI tier and complete setup instructions provided

Generated with AI, which can make mistakes.

#ai-tools#ai-agents#open-source#product-launch
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The original title is: "PhishVision: a Vision AI API for phishing detection and hidden prompt injection discovery"
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