Not Human Search vs Perspective

Not Human Search indexes websites and MCP servers by "agentic readiness" — how easily an AI agent can interact with a site via APIs, machine-readable docs, or MCP — exposing search, per-domain reports, and a live /check crawl that returns a 7-signal readiness score. It ships a public OpenAPI spec and an llms.txt file at its API root, with anonymous access to basic queries capped at a free 10-checks-per-hour rate limit, and Stripe-billed starter/pro/scale plans for higher-volume access or commerce endpoints like score monitoring and GEO score-fix services.

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.