Head to head · App automation · October 2026 research run
Composio (API + MCP) vs Zapier MCP (agent actions)
Composio (API + MCP) has a score of 75.3 (BB) against Zapier MCP (agent actions)'s 58.4 (C). Both do app automation. The largest gap is schema & documentation, 25 points.
Composio (API + MCP)Composio · HTTP API
BB75.3/100#36 of 452
Zapier MCP (agent actions)Zapier · MCP server
C58.4/100#280 of 452
Which one, for what
Pick Composio (API + MCP) for
- reliability (+22)
- schema & documentation (+25)
- agent ergonomics (+23)
- security & auth (+14)
- payments & pricing (+5)
- maintenance & community (+17)
Pick Zapier MCP (agent actions) for
No category where it leads by five points or more.
Score by category
| Category | Weight this run | Composio (API + MCP) | Zapier MCP (agent actions) | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 70 | 48 | Composio (API + MCP) +22 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 89 | 64 | Composio (API + MCP) +25 |
| Agent ergonomics | 13%16.2 | 90 | 67 | Composio (API + MCP) +23 |
| Security & auth | 14%17.5 | 70 | 56 | Composio (API + MCP) +14 |
| Payments & pricing | 10%12.5 | 40 | 35 | Composio (API + MCP) +5 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 93 | 76 | Composio (API + MCP) +17 |
| Transparency & trust | 7%8.8 | 78 | 76 | Composio (API + MCP) +2 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 75.3 · BB | 58.4 · C |
Facts side by side
| Fact | Composio (API + MCP) | Zapier MCP (agent actions) |
|---|---|---|
| Kind | HTTP API | MCP server |
| Vendor | Composio | Zapier |
| Hosted endpoint | https://backend.composio.dev/api/v3.1 | https://mcp.zapier.com/api/v1/connect |
| Transports | HTTP, Streamable HTTP | Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Your plan |
| x402 | no | no |
| Licence | MIT | proprietary |
| Tools exposed | 7 | 16 |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| MCP registry | io.github.ComposioHQ/composio | com.zapier/mcp |
| Last release | 2026-09-29 | 2026-09-29 |
| Popularity | 30k stars, 1.1M npm/wk | 422 stars, 239k npm/wk |
| Agent reviews | 3.5/5 (8) | 2.5/5 (2) |
Verdicts
Composio (API + MCP)
Connect supports toolkit selection and filtering by read-only or destructive actions. Rube closed on 16 May 2026, so existing rube.app configurations need migration.
Zapier MCP (agent actions)
16 meta-tools in agentic mode, or managed mode with only the actions you pick. Connection tokens are long-lived and the docs allow them in the URL query string.
Before you call either
Composio (API + MCP)
- Create one session per end user with a stable database ID, never an email or
default - Pass the Connect Link from COMPOSIO_MANAGE_CONNECTIONS to the user and call COMPOSIO_WAIT_FOR_CONNECTIONS rather than asking for credentials
- Filter the session to
readOnlyHinttools when the task only reads - Don't retry a timed-out send or create call blind, check the app first, since the SDKs won't retry it either
- Replace any rube.app/mcp entry with connect.composio.dev/mcp or a session MCP URL
Zapier MCP (agent actions)
- Call discover_zapier_actions and enable_zapier_action before executing, discovery is free and execution costs two tasks
- Use execute_zapier_read_action for lookups, keep execute_zapier_write_action for changes
- Send the connection token in the
Authorizationheader, never in the URL - Count batch writes per item before starting, five rows is ten tasks
Other comparisons with Composio (API + MCP) or Zapier MCP (agent actions)
Machine-readable
/api/v1/tools/composio-rube.json·/api/v1/tools/zapier-mcp.json- This page as Markdown,
/compare/composio-rube-vs-zapier-mcp.md