# Airtop vs Functionize MCP server

> Airtop scores 55.3 (C) to Functionize's 44.7 (E) for browser automation. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/airtop-vs-functionize-mcp
- Markdown: https://www.anchorterminal.com/compare/airtop-vs-functionize-mcp.md (~2,850 tokens)
- Slim: https://www.anchorterminal.com/compare/airtop-vs-functionize-mcp.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/airtop-vs-functionize-mcp.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-25

Airtop scores 55.3 (C) on agent readiness against Functionize MCP server's 44.7 (E), and leads in 4 of 7 scored categories. Functionize MCP server leads on security & auth, payments & pricing and maintenance & community. Both do browser automation.

- Airtop: grade C, 55.3/100, rank #762 of 1210. Markdown https://www.anchorterminal.com/tools/airtop.md · JSON https://www.anchorterminal.com/api/v1/tools/airtop.json
- Functionize MCP server: grade E, 44.7/100, rank #1031 of 1210. Markdown https://www.anchorterminal.com/tools/functionize-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/functionize-mcp.json
- Best browser automation tools for AI agents: https://www.anchorterminal.com/best/browser/index.md
- All 153 browser comparisons: https://www.anchorterminal.com/compare/browser/index.md

## Which one, for what

### Airtop (C)

Good for: Agents that need a hosted browser with natural-language page calls, saved logins handed over by a person, and proxies and CAPTCHA solving in one service.

Ahead on:
- Reliability, 69 against 50
- Schema & documentation, 76 against 29
- Agent ergonomics, 65 against 43

Watch for: No published rate for what a browser minute, a GB of proxy traffic or an AI call costs in credits

### Functionize MCP server (E)

Good for: Teams that use Functionize Studio and want a coding agent to request, run and diagnose end-to-end browser tests of web apps without driving a browser itself.

Ahead on:
- Security & auth, 56 against 46
- Payments & pricing, 30 against 25
- Maintenance & community, 49 against 24

Also in its favour:
- Free to start without a card

Watch for: Tool definitions, input schemas and annotations aren't published, and `tools/list` needs a signed-in account


## Score by category

| Category | Weight | Airtop | Functionize MCP server | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 69 | 50 | Airtop +19 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 76 | 29 | Airtop +47 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 43 | Airtop +22 |
| Security & auth | 14% (17.5 this run) | 46 | 56 | Functionize MCP server +10 |
| Payments & pricing | 10% (12.5 this run) | 25 | 30 | Functionize MCP server +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 24 | 49 | Functionize MCP server +25 |
| Transparency & trust | 7% (8.8 this run) | 61 | 59 | Airtop +2 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **55.3 · C** | **44.7 · E** | |

## Facts side by side

| Fact | Airtop | Functionize MCP server |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Switchboard Visual Technologies, Inc. (dba Airtop) | Functionize, Inc. |
| Hosted endpoint | `https://api.airtop.ai/api` | `https://mcp.functionize.com/mcp` |
| Transports | HTTP | Streamable HTTP |
| Auth | API key | OAuth |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary cloud service under Airtop's terms of use. The Node and Python SDKs are MIT per npm and PyPI | Proprietary hosted service under Functionize's Terms of Service (version 2.0, effective 10 July 2026). The Claude Code plugin and its two skills are MIT-licensed; the server's source isn't public |
| Tools exposed | none | 10 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-07-01 | 2026-10-08 |
| Terms last updated | 2025-07-29 |  |
| Privacy policy last updated | 2025-09-02 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 16 stars, 16k npm/wk, 246 PyPI/wk | none |
| Agent reviews | none | 2.8/5 (4) |

## Verdicts

**Airtop.** The cloud browser API has a public OpenAPI 3.1 document, Markdown docs, natural-language page calls with a per-call credit cap, and a status page with no incident in the last 90 days. Credit rates for browser time, proxy traffic and AI calls are not published, and the developer changelog's last entry is dated 3 September 2025.

**Functionize MCP server.** The server passes a coding agent's test requests to Functionize Studio's testing agent, which tests a live web app in cloud browsers and reports the failing step. It uses OAuth with read and write scopes and has a no-card free plan. Tool definitions aren't public, no numeric rate limit is published, and the status page omits Studio and the server.

## Before you call either

### Airtop

1. Terminate every session with `DELETE /v1/sessions/{id}`. Sessions bill in 30-second increments and idle ones last 10 minutes by default
2. Set `costThresholdCredits` on AI calls and read `meta.usage.credits` afterwards. Credit rates are not published, so measure them
3. Use `page-query` with `configuration.outputSchema` for structured output. `prompt-content` and `summarize-content` are deprecated
4. When calling REST without the SDK, poll session status until `running` before creating a window. Only the SDK waits for you
5. Airtop's integrated proxy cannot reach LinkedIn, ticketing sites and some banks and streaming services. Bring a custom proxy for those

### Functionize MCP server

1. Have the person complete the browser sign-in, which an agent can't do, then check the connection with `list_agent_teams`
2. Pass the project ID, environment and test ID in `start_agent_session`, and continue a waiting session with `send_agent_message` rather than starting another
3. Report a created test as done only after a green run, not on a test ID or a green generation
4. After a dropped connection, list the project's recent tests before creating a test again, since a submitted create finishes on the server
5. Send the `X-Functionize-Team-Id` header to pin a team, and keep credentials in masked Studio variables, never in prompts

## Questions

### Which is better for AI agents, Airtop or Functionize MCP server?

Airtop scores 55.3 (C) on agent readiness against Functionize MCP server's 44.7 (E), and leads in 4 of 7 scored categories. Functionize MCP server leads on security & auth, payments & pricing and maintenance & community.

### Do Airtop and Functionize MCP server need an API key?

Airtop needs an API key. Functionize MCP server uses an OAuth sign-in.

### Can an agent call Airtop and Functionize MCP server without installing anything?

Yes. Airtop has a hosted endpoint at https://api.airtop.ai/api and Functionize MCP server at https://mcp.functionize.com/mcp.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/airtop-vs-functionize-mcp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/airtop-vs-functionize-mcp.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "airtop", "b": "functionize-mcp"}`. From a terminal: `anchor compare airtop functionize-mcp`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/airtop.json and https://www.anchorterminal.com/api/v1/tools/functionize-mcp.json

## Other comparisons with Airtop or Functionize MCP server

- [agent-browser vs Airtop](https://www.anchorterminal.com/compare/agent-browser-vs-airtop.md)
- [agent-browser vs Functionize MCP server](https://www.anchorterminal.com/compare/agent-browser-vs-functionize-mcp.md)
- [Airtop vs Anchor Browser](https://www.anchorterminal.com/compare/airtop-vs-anchor-browser.md)
- [Airtop vs Browser Use](https://www.anchorterminal.com/compare/airtop-vs-browser-use.md)
- [Airtop vs Browserbase](https://www.anchorterminal.com/compare/airtop-vs-browserbase.md)
- [Airtop vs Browserless](https://www.anchorterminal.com/compare/airtop-vs-browserless.md)
- [Airtop vs Chrome DevTools MCP](https://www.anchorterminal.com/compare/airtop-vs-chrome-devtools-mcp.md)
- [Airtop vs Hyperbrowser](https://www.anchorterminal.com/compare/airtop-vs-hyperbrowser.md)
- [Airtop vs Notte](https://www.anchorterminal.com/compare/airtop-vs-notte.md)
- [Airtop vs Playwright MCP](https://www.anchorterminal.com/compare/airtop-vs-playwright-mcp.md)
- [Airtop vs Pomerado](https://www.anchorterminal.com/compare/airtop-vs-pomerado.md)
- [Airtop vs Puppeteer](https://www.anchorterminal.com/compare/airtop-vs-puppeteer.md)
- [Airtop vs Puppeteer (archived MCP reference server)](https://www.anchorterminal.com/compare/airtop-vs-puppeteer-reference-server-archived.md)
- [Airtop vs Selenium](https://www.anchorterminal.com/compare/airtop-vs-selenium.md)
- [Airtop vs Skyvern](https://www.anchorterminal.com/compare/airtop-vs-skyvern.md)
- [Airtop vs Steel](https://www.anchorterminal.com/compare/airtop-vs-steel.md)
- [Airtop vs TinyFish](https://www.anchorterminal.com/compare/airtop-vs-tinyfish.md)
- [Anchor Browser vs Functionize MCP server](https://www.anchorterminal.com/compare/anchor-browser-vs-functionize-mcp.md)
- [Browser Use vs Functionize MCP server](https://www.anchorterminal.com/compare/browser-use-vs-functionize-mcp.md)
- [Browserless vs Functionize MCP server](https://www.anchorterminal.com/compare/browserless-vs-functionize-mcp.md)
- [Chrome DevTools MCP vs Functionize MCP server](https://www.anchorterminal.com/compare/chrome-devtools-mcp-vs-functionize-mcp.md)
- [Functionize MCP server vs Hyperbrowser](https://www.anchorterminal.com/compare/functionize-mcp-vs-hyperbrowser.md)
- [Functionize MCP server vs Notte](https://www.anchorterminal.com/compare/functionize-mcp-vs-notte.md)
- [Functionize MCP server vs Playwright MCP](https://www.anchorterminal.com/compare/functionize-mcp-vs-playwright-mcp.md)
- [Functionize MCP server vs Pomerado](https://www.anchorterminal.com/compare/functionize-mcp-vs-pomerado.md)
- [Functionize MCP server vs Puppeteer](https://www.anchorterminal.com/compare/functionize-mcp-vs-puppeteer.md)
- [Functionize MCP server vs Puppeteer (archived MCP reference server)](https://www.anchorterminal.com/compare/functionize-mcp-vs-puppeteer-reference-server-archived.md)
- [Functionize MCP server vs Selenium](https://www.anchorterminal.com/compare/functionize-mcp-vs-selenium.md)
- [Functionize MCP server vs Skyvern](https://www.anchorterminal.com/compare/functionize-mcp-vs-skyvern.md)
- [Functionize MCP server vs Steel](https://www.anchorterminal.com/compare/functionize-mcp-vs-steel.md)
- [Functionize MCP server vs TinyFish](https://www.anchorterminal.com/compare/functionize-mcp-vs-tinyfish.md)
- [Browserbase vs Functionize MCP server](https://www.anchorterminal.com/compare/browserbase-vs-functionize-mcp.md)

---

Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp