https://demo.cbrowser.ai/mcp ↗
105-tool browser automation with cognitive user simulation, visual testing, persona system, and site knowledge. Rate limited (50 req/hr). Free for evaluation
Cognitive Browser is a remote MCP server published at demo.cbrowser.ai. It has been probed 7 times since 9/10/2026. It answered in 7 of them (100.0%), a near-uninterrupted record. Median response time is 485 ms, placing it among the faster endpoints. It exposes a broad tool surface of 130 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
smart_click — Confusing name; 'smart' implies intelligence but doesn't clarify its unique purpose compared to 'click'dismiss_overlay — Vague reference to 'Constitutional Yellow zone' without explanation of implicationsattention_analysis — Truncated description with no clear explanation of output format or use caseheal_stats — No mention of error conditions or empty cache handlingvisual_regression — Ambiguous fallback behavior description ('traditional comparison' lacks definition)Risk: medium
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
Add this badge to your README — it updates automatically as measurements change.
[](https://mcpmetrics.io/servers/alexandria-shai-eden-cbrowser)<a href="https://mcpmetrics.io/servers/alexandria-shai-eden-cbrowser"><img src="https://mcpmetrics.io/badge/alexandria-shai-eden/cbrowser/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
Sign up free to see| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-11 11:20:19 | Legacy | 401 | 472 | 200 | 472 | 2025-03-26 |
| 2026-09-11 09:28:19 | Legacy | 401 | 369 | 200 | 368 | 2025-03-26 |
| 2026-09-11 07:35:54 | Legacy | 401 | 750 | 200 | 747 | 2025-03-26 |
| 2026-09-11 05:44:28 | Legacy | 401 | 471 | 200 | 495 | 2025-03-26 |
| 2026-09-11 03:50:39 | Legacy | 401 | 485 | 200 | 494 | 2025-03-26 |
| 2026-09-11 01:59:45 | Legacy | 401 | 612 | 200 | 621 | 2025-03-26 |
| 2026-09-10 21:16:35 | Auth-gated | 401 | 360 | 401 | 342 | — |
Each block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.
Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.
The two probe legs separately: modern server/discover and legacy initialize.