Developer Releases Sub-Millisecond Prompt Injection Detection API for AI Apps

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A developer has built and published a prompt injection detection API that returns results in under one millisecond, targeting security vulnerabilities in AI applications. The API, available on RapidAPI, scans user input for threats including classic jailbreaks, Base64-encoded payloads, Unicode spoofing, zero-width character attacks, and multilingual injections. Rather than using machine learning, the tool relies on regex-based pattern matching, which the developer argues offers lower latency, predictable false-positive rates, and full auditability. The API responds with a risk score, severity classification, and a sanitized version of the flagged text. The developer has released it on a free tier and is seeking community feedback on additional injection patterns to cover.

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