Agent Stack Directory

About Agent Stack Directory

Agent Stack Directory is a curated list of infrastructure that AI agents depend on, organized by layer of the stack. It covers cloud browsers, code sandboxes, long-term memory, search and web data APIs, email inboxes, payments, voice platforms, integrations and auth, observability, agent frameworks and identity. It is aimed at developers and teams who are shipping agents in production rather than building demos.

The directory lists 61 tools across 11 categories and provides side-by-side comparisons for many of them. Each entry is described with a short summary of what the product does, and the site notes a recent full link check. Visitors can browse by category, filter by popular layers such as browsers or sandboxes, and subscribe to a weekly email that announces newly added tools.

What sets it apart is its focus on checked, practical listings rather than an exhaustive feed. Paid placements are labeled and kept separate from the organic list, so the core catalog stays focused on the tools themselves.