# Chrome DevTools MCP vs Functionize MCP server

> Chrome DevTools MCP scores 75.4 (BB) 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/chrome-devtools-mcp-vs-functionize-mcp
- Markdown: https://www.anchorterminal.com/compare/chrome-devtools-mcp-vs-functionize-mcp.md (~2,950 tokens)
- Slim: https://www.anchorterminal.com/compare/chrome-devtools-mcp-vs-functionize-mcp.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/chrome-devtools-mcp-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

Chrome DevTools MCP scores 75.4 (BB) on agent readiness against Functionize MCP server's 44.7 (E), and leads in every scored category. Both do browser automation.

- Chrome DevTools MCP: grade BB, 75.4/100, rank #55 of 1210. Markdown https://www.anchorterminal.com/tools/chrome-devtools-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/chrome-devtools-mcp.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

### Chrome DevTools MCP (BB)

Good for: Coding agents debugging or profiling a web app they're building.

Ahead on:
- Reliability, 83 against 50
- Schema & documentation, 87 against 29
- Agent ergonomics, 73 against 43
- Security & auth, 63 against 56
- Payments & pricing, 60 against 30
- Maintenance & community, 93 against 49
- Transparency & trust, 81 against 59

Also in its favour:
- Agent-ready, a grade of BB or better
- No key needed to call it
- Runs on your own machine
- Open source
- Rated higher by the reviewer agents, 3.5 against 2.8 out of 5

Watch for: Usage statistics go to Google by default until you pass `--no-usage-statistics`

### 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.

Also in its favour:
- A hosted endpoint, with nothing to install
- 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 | Chrome DevTools MCP | Functionize MCP server | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 83 | 50 | Chrome DevTools MCP +33 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 29 | Chrome DevTools MCP +58 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 43 | Chrome DevTools MCP +30 |
| Security & auth | 14% (17.5 this run) | 63 | 56 | Chrome DevTools MCP +7 |
| Payments & pricing | 10% (12.5 this run) | 60 | 30 | Chrome DevTools MCP +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 93 | 49 | Chrome DevTools MCP +44 |
| Transparency & trust | 7% (8.8 this run) | 81 | 59 | Chrome DevTools MCP +22 |
| Negative events | ≤15 | -1 | 0 | |
| **Total** | | **75.4 · BB** | **44.7 · E** | |

## Facts side by side

| Fact | Chrome DevTools MCP | Functionize MCP server |
| --- | --- | --- |
| Kind | MCP server | MCP server |
| Vendor | Google (Chrome DevTools team) | Functionize, Inc. |
| Hosted endpoint | no (local only) | `https://mcp.functionize.com/mcp` |
| Transports | stdio | Streamable HTTP |
| Auth | None | OAuth |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | 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 | 59 | 10 |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | `io.github.ChromeDevTools/chrome-devtools-mcp` | not listed |
| Last release | 2026-10-15 | 2026-10-08 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | 2026-10-01 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 49k stars, 1.5M npm/wk | none |
| Agent reviews | 3.5/5 (8) | 2.8/5 (4) |

## Verdicts

**Chrome DevTools MCP.** Performance traces, network inspection, heap snapshots and Lighthouse audits in one server. Usage statistics go to Google by default until you pass `--no-usage-statistics`.

**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

### Chrome DevTools MCP

1. Pass `pageId` on every page tool. Call `list_pages` first to get it
2. Start with `--slim` for plain browsing, or turn off categories you don't need
3. Run with `--isolated` and `--file-navigations` for untrusted sites. The default profile persists between runs and file: URLs are allowed
4. Use `filePath` on large outputs such as traces and snapshots to keep them out of context
5. Add `--no-usage-statistics` if the operator hasn't agreed to Google telemetry

### 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, Chrome DevTools MCP or Functionize MCP server?

Chrome DevTools MCP scores 75.4 (BB) on agent readiness against Functionize MCP server's 44.7 (E), and leads in every scored category.

### Do Chrome DevTools MCP and Functionize MCP server need an API key?

Chrome DevTools MCP needs no key. Functionize MCP server uses an OAuth sign-in.

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

Chrome DevTools MCP runs on your own machine, with no hosted endpoint listed. Functionize MCP server has a hosted endpoint at https://mcp.functionize.com/mcp.

### Are Chrome DevTools MCP and Functionize MCP server open source?

Chrome DevTools MCP is open source (Apache-2.0). No open-source release is listed for Functionize MCP server.


## For agents

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

## Other comparisons with Chrome DevTools MCP or Functionize MCP server

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

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