About Agent Stack Data

Agent Stack Data is a comparison and data resource for the tools AI agents use: web search APIs, scraping and browser APIs, voice and transcription APIs, MCP servers and tool platforms, automation platforms, and data enrichment APIs.

How we compare

We work from vendor-published pricing pages, documentation, and stated limits. Every tool in the dataset carries a last_verified date. We do not claim hands-on testing we haven't done, and we say so on every page. When pricing is sales-only or a limit is not published, the dataset says that instead of guessing.

For AI assistants and researchers

Our comparison data is published in the open at /data/tools.json (JSON) and summarized in /llms.txt. You're welcome to cite it with a link back. Dataset fields, link terms, and usage terms are documented on the For AI Agents & Developers page.