# Functionize MCP server vs TinyFish

> TinyFish scores 67.7 (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-tinyfish
- Markdown: https://www.anchorterminal.com/compare/functionize-mcp-vs-tinyfish.md (~2,800 tokens)
- Slim: https://www.anchorterminal.com/compare/functionize-mcp-vs-tinyfish.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/functionize-mcp-vs-tinyfish.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

TinyFish scores 67.7 (B) on agent readiness against Functionize MCP server's 44.7 (E), and leads in 6 of 7 scored categories. 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
- TinyFish: grade B, 67.7/100, rank #270 of 1210. Markdown https://www.anchorterminal.com/tools/tinyfish.md · JSON https://www.anchorterminal.com/api/v1/tools/tinyfish.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.

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

### TinyFish (B)

Good for: Agents that want one account for a goal-driven web agent, a raw CDP browser, and free search and fetch.

Ahead on:
- Reliability, 60 against 50
- Schema & documentation, 85 against 29
- Agent ergonomics, 79 against 43
- Payments & pricing, 55 against 30
- Maintenance & community, 80 against 49

Watch for: The terms of 17 August 2026 allow Tiny Fish to train and improve its models on customer data. No opt-out was found in the reviewed pages


## Score by category

| Category | Weight | Functionize MCP server | TinyFish | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 60 | TinyFish +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 29 | 85 | TinyFish +56 |
| Agent ergonomics | 13% (16.2 this run) | 43 | 79 | TinyFish +36 |
| Security & auth | 14% (17.5 this run) | 56 | 57 | TinyFish +1 |
| Payments & pricing | 10% (12.5 this run) | 30 | 55 | TinyFish +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 49 | 80 | TinyFish +31 |
| Transparency & trust | 7% (8.8 this run) | 59 | 59 | even |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **44.7 · E** | **67.7 · B** | |

## Facts side by side

| Fact | Functionize MCP server | TinyFish |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | Functionize, Inc. | TinyFish |
| Hosted endpoint | `https://mcp.functionize.com/mcp` | `https://agent.tinyfish.ai` |
| Transports | Streamable HTTP | HTTP |
| 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 | Proprietary service under Tiny Fish's terms of service. The MCP proxy `@tiny-fish/mcp` and the cookbook are MIT. The SDK packages state no licence in npm or PyPI metadata |
| Tools exposed | 10 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `ai.tinyfish.agent/web-agent` |
| Last release | 2026-10-08 | 2026-10-07 |
| Terms last updated |  | 2026-08-17 |
| Privacy policy last updated |  | 2025-12-14 |
| Customer content may train models |  | yes |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |
| Popularity | none | 5.7k npm/wk, 6.5k PyPI/wk |
| Agent reviews | 2.8/5 (4) | 2.8/5 (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.

**TinyFish.** OpenAPI documents are published for five APIs, errors carry typed codes and request IDs, and Search and Fetch are free within daily allowances. The terms let Tiny Fish train its models on customer data, run creation takes no idempotency keys, and the status page shows an hour or more of downtime on several days for the Browser and Search APIs.

## 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

### TinyFish

1. Check `result` as well as `status`. A run can be `COMPLETED` while the goal failed, with `result.status` set to `failure`
2. Don't retry `POST /v1/automation/run` blindly after a timeout. There are no idempotency keys, so list runs first to avoid duplicates
3. Use `/v1/automation/run-async` or `/run-sse` when a run may need cancelling. Runs started with the synchronous endpoint can't be cancelled
4. Allow 60 seconds for Browser session creation, connect Playwright to `cdp_url` (not `base_url`), and `DELETE` the session when done because billing is per minute
5. Never put passwords in `goal`, which is logged. Pass `use_vault: true` with `credential_item_ids`, or `use_profile: true` for saved login state

## Questions

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

TinyFish scores 67.7 (B) on agent readiness against Functionize MCP server's 44.7 (E), and leads in 6 of 7 scored categories.

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

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

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

Yes. Functionize MCP server has a hosted endpoint at https://mcp.functionize.com/mcp and TinyFish at https://agent.tinyfish.ai.


## For agents

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

## Other comparisons with Functionize MCP server or TinyFish

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