# Agent tool access: app actions and authentication for agents (slim)

> 3 agent tool access ranked by the Anchor benchmark. Leader Composio (API + MCP) (BB). Services that hand an agent ready-made actions across thousands of apps, with the OAuth connections and credentials handled for you. Compared on action coverage, how authorisation works per end user, what the agent sees in its context, logs and price per call. Workflow builders are compared separately.

- Full: https://www.anchorterminal.com/categories/aggregator.md (~1,250 tokens) · this version ~280 tokens · JSON https://www.anchorterminal.com/categories/aggregator.json · canonical https://www.anchorterminal.com/categories/aggregator
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

- Tools: 3 · agent-ready (BB+): 1 · accept x402: 0 · JSON: https://www.anchorterminal.com/api/v1/tools.json · by capability: https://www.anchorterminal.com/api/v1/capabilities.json
- Capabilities: automation.apps, automation.auth, automation.actions, agent.tools

| # | Tool | Grade | Score | Confidence | x402 | Auth | Where | Slim |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 36 | Composio (API + MCP) | BB | 75.3 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/composio-rube.min.md |
| 280 | Zapier MCP (agent actions) | C | 58.4 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/zapier-mcp.min.md |
| 437 | letme | F | 36.7 | medium | no | None | hosted | https://www.anchorterminal.com/tools/letme.min.md |