Best tools for connecting AI agents to your apps
Tool platforms that let agents take actions in apps like Gmail, Slack and thousands more, with the authentication handled for you.
Ranked by score on our 100-point rubric (how we score). Scores are initial editorial estimates from public information, not hands-on tests. Pricing is labeled verified (checked on the vendor's official pricing page, with date) or unverified.
Quick picks
| # | Tool | Tier | Score |
|---|---|---|---|
| 1 | Composio Tool integrations for AI agents | A | 73 |
| 2 | Zapier MCP Connect agents to thousands of apps via MCP | A | 72 |
| 3 | Arcade Authenticated tool calling for agents | B | 65 |
The ranking
-
Managed integrations, delegated auth and sandboxed tool execution across 1,500+ apps, exposed as agent tools and MCP servers.
- Best for
- You need many authenticated app integrations for an agent.
- Skip it if
- You need only one or two integrations.
- Pricing
- Hobby $0 (100,000 tool calls/mo); Pro $29/mo with $29 usage credit ✓ verified on the official pricing page, Oct 18, 2026
- Platforms
- API · MCP · SDK
-
Exposes Zapier's app actions to any MCP client like Claude or Cursor.
- Best for
- You want your agent to act across business apps with no code.
- Skip it if
- You need high-volume, low-cost actions.
- Pricing
- Zapier Free plan; Professional from $19.99/mo ✓ verified on the official pricing page, Oct 18, 2026
- Platforms
- MCP
-
Platform for agents to take authorized actions in apps like Gmail and Slack with user-level auth.
- Best for
- You need secure, per-user OAuth actions for agents.
- Skip it if
- You are building a single-user hobby project.
- Pricing
- Free plan ($0, 2,000 auth events/mo); Team from $25/mo platform fee + usage ✓ verified on the official pricing page, Oct 18, 2026
- Platforms
- API · MCP · SDK
FAQ
What is the best AI tool for connecting AI agents to your apps?
Composio ranks first with 73/100 (A-tier). Tool integrations for AI agents. Use it when you need many authenticated app integrations for an agent. Next in our ranking: Zapier MCP (72/100, A-tier) and Arcade (65/100, B-tier).
Which AI tools for connecting AI agents to your apps have a free tier?
In our pricing data, Composio (verified), Zapier MCP (verified) and Arcade (verified) list a free tier. "Unverified" means it is an editorial summary we have not yet confirmed on the vendor's official pricing page, so check the vendor before relying on it.
Are there open-source options for connecting AI agents to your apps?
Yes. Composio is listed as open source or open weights. Check each project's license before commercial use.
How are these tools ranked?
Each tool is scored out of 100 on our public rubric: job fit (30), ease (15), value (15), momentum (15), openness and portability (10), trust and maturity (10) and a builder/gamer bonus (5). S-tier is 85+, A-tier 70–84, B-tier 55–69 and C-tier below 55. Current scores are initial editorial estimates from public information, not hands-on tests, and sponsors can't buy points.