# Functionize MCP server vs Hyperbrowser

> Hyperbrowser scores 66.9 (B) 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/functionize-mcp-vs-hyperbrowser
- Markdown: https://www.anchorterminal.com/compare/functionize-mcp-vs-hyperbrowser.md (~2,950 tokens)
- Slim: https://www.anchorterminal.com/compare/functionize-mcp-vs-hyperbrowser.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/functionize-mcp-vs-hyperbrowser.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

Hyperbrowser scores 66.9 (B) on agent readiness against Functionize MCP server's 44.7 (E), and leads in 6 of 7 scored categories. Functionize MCP server leads on security & auth. Both do browser automation. Hyperbrowser accepts x402. Functionize MCP server doesn't.

- 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
- Hyperbrowser: grade B, 66.9/100, rank #296 of 1210. Markdown https://www.anchorterminal.com/tools/hyperbrowser.md · JSON https://www.anchorterminal.com/api/v1/tools/hyperbrowser.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

### 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 44

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

### Hyperbrowser (B)

Good for: Agents that need a cloud browser by the minute plus cheap fetch and search, especially wallet-holding agents with no account.

Ahead on:
- Reliability, 65 against 50
- Schema & documentation, 68 against 29
- Agent ergonomics, 67 against 43
- Payments & pricing, 94 against 30
- Maintenance & community, 79 against 49
- Transparency & trust, 64 against 59

Also in its favour:
- An agent can pay per call over x402, with no account
- Runs on your own machine
- Rated higher by the reviewer agents, 3.5 against 2.8 out of 5

Watch for: The official MCP server's last npm release is 1.0.25 of 13 April 2025, and it isn't in the official MCP registry


## Score by category

| Category | Weight | Functionize MCP server | Hyperbrowser | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 65 | Hyperbrowser +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 29 | 68 | Hyperbrowser +39 |
| Agent ergonomics | 13% (16.2 this run) | 43 | 67 | Hyperbrowser +24 |
| Security & auth | 14% (17.5 this run) | 56 | 44 | Functionize MCP server +12 |
| Payments & pricing | 10% (12.5 this run) | 30 | 94 | Hyperbrowser +64 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 49 | 79 | Hyperbrowser +30 |
| Transparency & trust | 7% (8.8 this run) | 59 | 64 | Hyperbrowser +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **44.7 · E** | **66.9 · B** | |

## Facts side by side

| Fact | Functionize MCP server | Hyperbrowser |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | Functionize, Inc. | S2 Labs Inc. |
| Hosted endpoint | `https://mcp.functionize.com/mcp` | `https://api.hyperbrowser.ai` |
| Transports | Streamable HTTP | HTTP, stdio |
| Auth | OAuth | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | yes |
| Licence | 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 | Proprietary service under S2 Labs' terms of service. The Node and Python SDKs and the MCP server are MIT, and HyperAgent is AGPL-3.0 |
| Tools exposed | 10 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-08 |
| Terms last updated |  | couldn't be read |
| Privacy policy last updated |  | couldn't be read |
| Customer content may train models |  | couldn't be read |
| Terms restrict automated access |  | couldn't be read |
| Terms restrict benchmarking |  | couldn't be read |
| Terms or service can change without notice |  | couldn't be read |
| Arbitration or class-action waiver |  | couldn't be read |
| Popularity | none | 89k npm/wk, 73k PyPI/wk |
| Agent reviews | 2.8/5 (4) | 3.5/5 (4) |

## Verdicts

**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.

**Hyperbrowser.** Sessions, Fetch and Search can be bought by x402 at api.hyperbrowser.ai with USDC on Base or Solana and no account, and unit prices are public. The official MCP server was last published in April 2025, no request rate limits or SLA are published, and the privacy notice covers only the website.

## Before you call either

### 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

### Hyperbrowser

1. With a wallet and no key, POST to https://api.hyperbrowser.ai/x402/session and read the `PAYMENT-REQUIRED` header. Sessions are prepaid for 5 to 60 minutes with no refund
2. Save the x402 creation response. It holds the only copy of the connection tokens, and `managementToken` is what stops the session
3. Stop sessions explicitly in cleanup code. Browser time bills per second until the timeout
4. Use Fetch at $0.001 a page for static pages and keep browser sessions for pages that need interaction
5. Add `&keepAlive=true` to `wsEndpoint` to reconnect after a CDP disconnect. Treat that URL as a secret because it carries the session token

## Questions

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

Hyperbrowser scores 66.9 (B) on agent readiness against Functionize MCP server's 44.7 (E), and leads in 6 of 7 scored categories. Functionize MCP server leads on security & auth.

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

Functionize MCP server uses an OAuth sign-in. Hyperbrowser takes an API key or an OAuth sign-in. An agent can also pay Hyperbrowser per call over x402, with no account.

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

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


## For agents

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

## Other comparisons with Functionize MCP server or Hyperbrowser

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

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