# AI tools for writers with an API in 2026

> 5 AI tools for writers on Finder Atlas offer an API. In 2026 the top of the list is Claude, Perplexity and Otter.ai, ranked by reviews from people who use them.

- This page: https://finderatlas.com/best/writers/with-api
- Ranking: reviews on Finder Atlas first, then claimed listings, then editor-reviewed listings, then the editorial score. No paid placement.

## Tools

- [Claude](https://finderatlas.com/tools/claude): Anthropic's AI assistant for writing, analysis, coding and working with files (Freemium · Free plan, paid from $20/month · API · Web, macOS, Windows · 4.5/5 from 2 reviews)
- [Perplexity](https://finderatlas.com/tools/perplexity): AI answer engine that searches the live web and cites its sources (Freemium · Free plan, paid from $20/month · API · Web, iOS, Android)
- [Otter.ai](https://finderatlas.com/tools/otter-ai): Record, transcribe and summarize meetings, with action items and searchable AI chat (Freemium · Free plan, paid from $16.99/user/mo · API · Web, macOS, Windows)
- [Trust Me Bro](https://finderatlas.com/tools/trust-me-bro): Paste a claim, get cited research for and against it and a shareable receipt (Freemium · Free plan, paid from $9.99/month · API · Web, Chrome Extension, API)
- [Grammarly](https://finderatlas.com/tools/grammarly): AI writing assistant that corrects, rewrites and tone-checks your text across every app (Freemium · Free plan, paid from $30/month · API · Web, macOS, Windows)

## Related lists

- All 15 tools for writers: https://finderatlas.com/best/writers.md
- Free tools for writers (15): https://finderatlas.com/best/writers/free.md
- Tools with an API for writers (5): https://finderatlas.com/best/writers/with-api.md
- AI Assistants (3): https://finderatlas.com/categories/ai-assistants.md
- Audio & Speech AI (1): https://finderatlas.com/categories/audio-ai.md
- Productivity (1): https://finderatlas.com/categories/productivity.md

## FAQ

**What is the best AI tool for writers?**

Claude tops this list. Anthropic's AI assistant for writing, analysis, coding and working with files. It is freemium (free plan, paid from $20/month).

**Which AI tools for writers are free?**

Claude, Perplexity, Otter.ai, Trust Me Bro and Grammarly have a free plan, among 15 in total.

**Which AI tools for writers have an API?**

Claude, Perplexity, Otter.ai, Trust Me Bro and Grammarly offer an API.

**How is this list ranked?**

Tools with reviews on Finder Atlas come first, by rating. Then listings claimed by their makers, then listings checked by our editors, then Finder Atlas's own 0 to 10 editorial score. Nothing on the list is paid placement.