# Agent tool access compared head to head

> 28 head-to-head comparisons of agent tool access platforms for AI agents, grouped by the job each pair shares, with benchmark scores for both sides.

- Canonical: https://www.anchorterminal.com/compare/aggregator/
- Markdown: https://www.anchorterminal.com/compare/aggregator/index.md (~1,250 tokens)
- Slim: https://www.anchorterminal.com/compare/aggregator/index.min.md (~1,180 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/aggregator/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

- Ranked table: https://www.anchorterminal.com/categories/aggregator.md
- Shortlist and picks by need: https://www.anchorterminal.com/best/aggregator/index.md

## Ranked

1. [Composio (API + MCP)](https://www.anchorterminal.com/tools/composio-rube.md) BB 75.1
2. [Merge Agent Handler](https://www.anchorterminal.com/tools/merge-agent-handler.md) B 69.5
3. [StackOne](https://www.anchorterminal.com/tools/stackone.md) B 69.1
4. [One](https://www.anchorterminal.com/tools/one.md) B 66.6
5. [Unified.to MCP Server](https://www.anchorterminal.com/tools/unified-to-mcp.md) C 61.9
6. [Zapier MCP (agent actions)](https://www.anchorterminal.com/tools/zapier-mcp.md) C 58.1
7. [Smithery](https://www.anchorterminal.com/tools/smithery.md) D 50.7
8. [letme](https://www.anchorterminal.com/tools/letme.md) F 36.4

## App automation

- [Composio (API + MCP) vs Merge Agent Handler](https://www.anchorterminal.com/compare/composio-rube-vs-merge-agent-handler.md): BB 75.1 vs B 69.5
- [Composio (API + MCP) vs One](https://www.anchorterminal.com/compare/composio-rube-vs-one.md): BB 75.1 vs B 66.6
- [Composio (API + MCP) vs Smithery](https://www.anchorterminal.com/compare/composio-rube-vs-smithery.md): BB 75.1 vs D 50.7
- [Composio (API + MCP) vs StackOne](https://www.anchorterminal.com/compare/composio-rube-vs-stackone.md): BB 75.1 vs B 69.1
- [Composio (API + MCP) vs Unified.to MCP Server](https://www.anchorterminal.com/compare/composio-rube-vs-unified-to-mcp.md): BB 75.1 vs C 61.9
- [Composio (API + MCP) vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/composio-rube-vs-zapier-mcp.md): BB 75.1 vs C 58.1
- [Merge Agent Handler vs One](https://www.anchorterminal.com/compare/merge-agent-handler-vs-one.md): B 69.5 vs B 66.6
- [Merge Agent Handler vs Smithery](https://www.anchorterminal.com/compare/merge-agent-handler-vs-smithery.md): B 69.5 vs D 50.7
- [Merge Agent Handler vs StackOne](https://www.anchorterminal.com/compare/merge-agent-handler-vs-stackone.md): B 69.5 vs B 69.1
- [Merge Agent Handler vs Unified.to MCP Server](https://www.anchorterminal.com/compare/merge-agent-handler-vs-unified-to-mcp.md): B 69.5 vs C 61.9
- [Merge Agent Handler vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/merge-agent-handler-vs-zapier-mcp.md): B 69.5 vs C 58.1
- [One vs Smithery](https://www.anchorterminal.com/compare/one-vs-smithery.md): B 66.6 vs D 50.7
- [One vs StackOne](https://www.anchorterminal.com/compare/one-vs-stackone.md): B 66.6 vs B 69.1
- [One vs Unified.to MCP Server](https://www.anchorterminal.com/compare/one-vs-unified-to-mcp.md): B 66.6 vs C 61.9
- [One vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/one-vs-zapier-mcp.md): B 66.6 vs C 58.1
- [Smithery vs StackOne](https://www.anchorterminal.com/compare/smithery-vs-stackone.md): D 50.7 vs B 69.1
- [Smithery vs Unified.to MCP Server](https://www.anchorterminal.com/compare/smithery-vs-unified-to-mcp.md): D 50.7 vs C 61.9
- [Smithery vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/smithery-vs-zapier-mcp.md): D 50.7 vs C 58.1
- [StackOne vs Unified.to MCP Server](https://www.anchorterminal.com/compare/stackone-vs-unified-to-mcp.md): B 69.1 vs C 61.9
- [StackOne vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/stackone-vs-zapier-mcp.md): B 69.1 vs C 58.1
- [Unified.to MCP Server vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/unified-to-mcp-vs-zapier-mcp.md): C 61.9 vs C 58.1

## Tool access for agents

- [Composio (API + MCP) vs letme](https://www.anchorterminal.com/compare/composio-rube-vs-letme.md): BB 75.1 vs F 36.4
- [letme vs Merge Agent Handler](https://www.anchorterminal.com/compare/letme-vs-merge-agent-handler.md): F 36.4 vs B 69.5
- [letme vs One](https://www.anchorterminal.com/compare/letme-vs-one.md): F 36.4 vs B 66.6
- [letme vs Smithery](https://www.anchorterminal.com/compare/letme-vs-smithery.md): F 36.4 vs D 50.7
- [letme vs StackOne](https://www.anchorterminal.com/compare/letme-vs-stackone.md): F 36.4 vs B 69.1
- [letme vs Unified.to MCP Server](https://www.anchorterminal.com/compare/letme-vs-unified-to-mcp.md): F 36.4 vs C 61.9
- [letme vs Zapier MCP (agent actions)](https://www.anchorterminal.com/compare/letme-vs-zapier-mcp.md): F 36.4 vs C 58.1