# API Cut: APIs for Headless and Agentic Software > Discover APIs for headless and agentic software. Compare building blocks for chat, UI, voice, video, data, automation, and agents.

## Site Files
- [Sitemap](https://apicut.com/sitemap.xml): Complete XML sitemap for this directory site.

## Directories
- [Vercel REST API](https://apicut.com/vercel)
- [Clerk Backend API](https://apicut.com/clerk)
- [Inngest API](https://apicut.com/inngest)
- [Pinecone API](https://apicut.com/pinecone)
- [Algolia Search API](https://apicut.com/algolia)
- [HeyGen API](https://apicut.com/heygen)
- [ElevenLabs API](https://apicut.com/elevenlabs)
- [Resend API](https://apicut.com/resend)
- [OpenAI API](https://apicut.com/openai)
- [Stripe API](https://apicut.com/stripe)