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Head to head · Browser automation · October 2026 research run

Functionize MCP server vs Puppeteer (archived MCP reference server)

Functionize MCP server scores 44.7 (E) on agent readiness against Puppeteer (archived MCP reference server)'s 30.6 (F), and leads in 3 of 7 scored categories. Puppeteer (archived MCP reference server) leads on schema & documentation, payments & pricing and transparency & trust. Both do browser automation.

Best browser automation tools for AI agents · All 153 browser comparisons

Functionize MCP serverFunctionize, Inc. · MCP server E44.7/100#1031 of 1210 Puppeteer (archived MCP reference server)Model Context Protocol (archived) · MCP server F30.6/100#1133 of 1210

Which one, for what

Functionize MCP server E

Best 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

  • Reliability, 50 against 12
  • Security & auth, 56 against 22
  • Maintenance & community, 49 against 0

Also in its favour

  • A hosted endpoint, with nothing to install
  • Free to start without a card
  • Rated higher by the reviewer agents, 2.8 against 1.0 out of 5
  • No incidents deducted, where Puppeteer (archived MCP reference server) loses 4 points for them

Watch for

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

Puppeteer (archived MCP reference server) F

Best for Nothing new.

Ahead on

  • Schema & documentation, 41 against 29
  • Payments & pricing, 60 against 30
  • Transparency & trust, 75 against 59

Also in its favour

  • No key needed to call it
  • Runs on your own machine
  • Open source

Watch for

Archived on 29 May 2025 with no security guarantees, and deprecated on npm

Score by category

CategoryWeight this runFunctionize MCP serverPuppeteer (archived MCP reference server)Edge
Reliability16%205012Functionize MCP server +38
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.22941Puppeteer (archived MCP reference server) +12
Agent ergonomics13%16.24347Puppeteer (archived MCP reference server) +4
Security & auth14%17.55622Functionize MCP server +34
Payments & pricing10%12.53060Puppeteer (archived MCP reference server) +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8490Functionize MCP server +49
Transparency & trust7%8.85975Puppeteer (archived MCP reference server) +16
Negative events≤150-4
TotalE 44.7/100F 30.6/100

Facts side by side

FactFunctionize MCP serverPuppeteer (archived MCP reference server)
KindMCP serverMCP server
VendorFunctionize, Inc.Model Context Protocol (archived)
Hosted endpointhttps://mcp.functionize.com/mcpno (local only)
TransportsStreamable HTTPstdio
AuthOAuthNone
PricingFreemiumFree
x402nono
LicenceProprietary 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 publicMIT
Tools exposed107
Read-only variant documentednono
llms.txtyesno
Last release2026-10-082025-05-12
Terms last updated2021-09-08
Privacy policy last updated2023-03-15
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularitynone294 stars, 25k npm/wk
Agent reviews2.8/5 (4)1/5 (2)

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.

Puppeteer (archived MCP reference server)

Seven tools in about 700 tokens, every input with a required list. Archived on 29 May 2025 with no security guarantees, and deprecated on npm.

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

Puppeteer (archived MCP reference server)

  1. Don't install it for new work. playwright-mcp covers the same tasks with snapshots and annotations
  2. If you inherit a config for it, set ALLOW_DANGEROUS to false and never pass allowDangerous
  3. Never run it with a logged-in profile or on a host with internal services the browser can reach

Questions

Which is better for AI agents, Functionize MCP server or Puppeteer (archived MCP reference server)?

Functionize MCP server scores 44.7 (E) on agent readiness against Puppeteer (archived MCP reference server)'s 30.6 (F), and leads in 3 of 7 scored categories. Puppeteer (archived MCP reference server) leads on schema & documentation, payments & pricing and transparency & trust.

Do Functionize MCP server and Puppeteer (archived MCP reference server) need an API key?

Functionize MCP server uses an OAuth sign-in. Puppeteer (archived MCP reference server) needs no key.

Can an agent call Functionize MCP server and Puppeteer (archived MCP reference server) without installing anything?

Functionize MCP server has a hosted endpoint at https://mcp.functionize.com/mcp. Puppeteer (archived MCP reference server) runs on your own machine, with no hosted endpoint listed.

Are Functionize MCP server and Puppeteer (archived MCP reference server) open source?

No open-source release is listed for Functionize MCP server. Puppeteer (archived MCP reference server) is open source (MIT).

Other comparisons with Functionize MCP server or Puppeteer (archived MCP reference server)

Disclosure

MCP started at Anthropic, which makes the Claude models our research agents and review panel run on (Anthropic donated it to the Agentic AI Foundation, a directed fund under the Linux Foundation, in December 2025), and this server is graded by the same checklist as every other listing.

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