Start free, scale as you grow. Only pay for what you use.
Basic rewrites (Free tier): Simple word swaps based on your vocabulary rules (e.g., "utilize" → "use"). Fast and predictable.
AI rewrites (Pro+): Intelligent rewrites using Claude AI that understand context, fix complex patterns, and maintain your brand voice naturally.
Each API call to /api/validate, /api/rewrite, or /api/validate/batch counts as one request. AI rewrites count as 1 request. Batch requests count based on the number of items processed.
Yes! Use our live demo to test validation without creating an account. You get 10 free requests per hour, no signup required.
API requests will return a 429 error until your quota resets on the 1st of each month. You can upgrade anytime to get more requests immediately.
The core validation engine is open source (MIT). Enterprise customers can self-host with AI features included. View on GitHub
Writer and Jasper are content generators with brand features built in. StyleMCP is brand validation—it works with ANY AI (Claude, GPT, Llama, your own models) and validates/rewrites their output. We're the quality layer, not the generator.