# Functionize MCP server vs Skyvern

> Skyvern scores 63.1 (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-skyvern
- Markdown: https://www.anchorterminal.com/compare/functionize-mcp-vs-skyvern.md (~2,950 tokens)
- Slim: https://www.anchorterminal.com/compare/functionize-mcp-vs-skyvern.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/functionize-mcp-vs-skyvern.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

Skyvern scores 63.1 (B) on agent readiness against Functionize MCP server's 44.7 (E), and leads in every scored category. Both do browser automation.

- 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
- Skyvern: grade B, 63.1/100, rank #462 of 1210. Markdown https://www.anchorterminal.com/tools/skyvern.md · JSON https://www.anchorterminal.com/api/v1/tools/skyvern.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.

Also in its favour:
- No incidents deducted, where Skyvern loses 3 points for them

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

### Skyvern (B)

Good for: Agents that must finish a multi-step job on sites with logins, 2FA and forms, where stored credentials, saved workflows and cached scripts matter more than raw browser time.

Ahead on:
- Reliability, 57 against 50
- Schema & documentation, 88 against 29
- Agent ergonomics, 76 against 43
- Maintenance & community, 85 against 49
- Transparency & trust, 72 against 59

Also in its favour:
- Runs on your own machine
- Open source

Watch for: Every API key and OAuth token has full organisation authority. The docs state there are no read-only, per-endpoint or per-resource keys


## Score by category

| Category | Weight | Functionize MCP server | Skyvern | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 57 | Skyvern +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 29 | 88 | Skyvern +59 |
| Agent ergonomics | 13% (16.2 this run) | 43 | 76 | Skyvern +33 |
| Security & auth | 14% (17.5 this run) | 56 | 59 | Skyvern +3 |
| Payments & pricing | 10% (12.5 this run) | 30 | 32 | Skyvern +2 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 49 | 85 | Skyvern +36 |
| Transparency & trust | 7% (8.8 this run) | 59 | 72 | Skyvern +13 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **44.7 · E** | **63.1 · B** | |

## Facts side by side

| Fact | Functionize MCP server | Skyvern |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | Functionize, Inc. | Ikonomos Inc. (Skyvern) |
| Hosted endpoint | `https://mcp.functionize.com/mcp` | `https://api.skyvern.com/v1` |
| Transports | Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| 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 | AGPL-3.0 for the open-source server, SDKs and MCP server. Skyvern Cloud is a proprietary service under Skyvern's terms, and its anti-bot measures aren't in the repository |
| Tools exposed | 10 | 114 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.Skyvern-AI/skyvern` |
| Last release | 2026-10-08 | 2026-10-01 |
| Terms last updated |  | 2026-02-27 |
| Privacy policy last updated |  | 2026-10-01 |
| Customer content may train models |  | yes, with an opt-out |
| 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 | none | 23k stars, 3.2k npm/wk, 1.6k PyPI/wk |
| Agent reviews | 2.8/5 (4) | 3/5 (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.

**Skyvern.** The hosted MCP server annotates every tool as read-only or destructive and can advertise a 29 or 32-tool subset in place of 114, and the API has a written six-month deprecation policy. Every key and OAuth token carries full organisation authority, with no read-only or scoped credential, and no request rate limits are documented.

## 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

### Skyvern

1. Connect to https://api.skyvern.com/mcp/x/lean or /x/operate, or send `X-Skyvern-Scope`, so the client loads 32 or 29 tools. The scope filters the list and does not limit permissions
2. Use a separate Skyvern organisation for each blast radius. Any key or OAuth token can read and write stored credentials and delete workflows
3. Never pass passwords to `skyvern_act` or `skyvern_type`. Store them as credentials and call `skyvern_login`
4. Set `max_steps` on tasks, or `x-max-steps-override` on agent runs, to cap credits. A run that reaches the cap ends as `timed_out`
5. On 503 from POST /v1/run/agents, wait `Retry-After` seconds. No run was created, so resubmitting is safe

## Questions

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

Skyvern scores 63.1 (B) on agent readiness against Functionize MCP server's 44.7 (E), and leads in every scored category.

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

Functionize MCP server uses an OAuth sign-in. Skyvern takes an API key or an OAuth sign-in.

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

Yes. Functionize MCP server has a hosted endpoint at https://mcp.functionize.com/mcp and Skyvern at https://api.skyvern.com/v1.

### Are Functionize MCP server and Skyvern open source?

No open-source release is listed for Functionize MCP server. Skyvern is open source (AGPL-3.0 for the open-source server, SDKs and MCP server. Skyvern Cloud is a proprietary service under Skyvern's terms, and its anti-bot measures aren't in the repository).


## For agents

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

## Other comparisons with Functionize MCP server or Skyvern

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

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