# Best Agent tools & infrastructure agents — The Agents Index

> Source: https://theagentsindex.com/category/agent-tools (curated, quality-gated, re-verified)

What agents run on rather than what they are: MCP servers and tool APIs built for an agent to call, plus the memory, sandboxing, evaluation and orchestration layers underneath them. These are listed as tooling and never ranked against autonomous agents.

2 quality-gated agents in this category. Each name links to its answer-first markdown twin.

| Name | What it is | Pricing | API |
| --- | --- | --- | --- |
| [Browserbase](https://theagentsindex.com/browserbase.md) | Cloud browser infrastructure and APIs for building and running browser automation and AI agents | freemium | Yes |
| [SalesTouch](https://theagentsindex.com/salestouch.md) | A remote MCP server that gives AI agents like Claude and Codex direct LinkedIn outreach tools, no extension required | paid | Yes |