Machine Learning — entry 018 of 24
Perspective
Perspective API, built by Google's Jigsaw team, scores text for toxicity, insults, threats, and related attributes using ML models trained on human-rated comments, returning probabilities from a JSON REST endpoint (commentanalyzer.googleapis.com). It's free and quota-gated rather than metered, but Google has announced the service will be shut down after 2026 and is only accepting quota-increase requests through February 2026. New integrations should plan for a different moderation provider before then, since Google has said it won't offer direct migration support.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score78
Authentication15/25API key required
Pricing20/20Free to use
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/perspective/"><img src="https://greatapis.com/badge/perspective.svg" alt="Scored 78 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.