MCP Mermaid

Name: MCP Mermaid Review
Item: MCP Mermaid
Rating: 3.8
Author: Aaron Matthews

Connector Documents & Content Solid

Works inClaude Code Claude Cowork Claude Chat

Solid Scanned — metadata only

510 stars. AI agents produce flowcharts, sequence diagrams, Gantt charts, and architecture diagrams on the fly.

Generates Mermaid diagrams dynamically via MCP. All Mermaid syntax supported, exports to SVG, PNG, and base64. Includes validation for multi-round output.

Generate flowcharts and sequence diagrams from natural language descriptions
Create Gantt charts for project timelines automatically
Export architecture diagrams as SVG or PNG for documentation

618 starsMIT (commercial OK)FreeNo code needed

Why it matters

510 stars. AI agents produce flowcharts, sequence diagrams, Gantt charts, and architecture diagrams on the fly.

Best for

Anyone who needs diagrams in documentation, presentations, or architecture reviews.

Works in

Claude Code Claude Cowork Claude Chat

Source

https://github.com/hustcc/mcp-mermaid

By hustcc

How to Get It

Option 1: Claude Desktop AppOpen the Customize panel in the sidebar → browse connectors → search and add. Works in Claude Code, Claude Cowork, and Claude Chat.

Option 2: Paste into Claude CodeCopy the command below and paste it into a Claude Code conversation. Claude will run it for you.

Command

claude mcp add mcp-mermaid -- npx -y mcp-mermaid

Tip: Paste this into a Claude Code conversation. Verify command matches your Claude Code version.

First thing to try

Once it’s connected, paste this into Claude:

Help me generate flowcharts and sequence diagrams from natural language descriptions

CostFree

Trust Signals Auto-scanned

Stars618Contributors12Last updated2026-05-15LicenseMIT (OK for commercial use)Known CVEsNone foundSources: GitHub Advisory Database + OSV.dev · Scanned 2026-07-31 · scanner vattempted-no-data

Data & Access

Data processingPrompts sent to Anthropic API. Enterprise/Team plans exclude training.

Community Pulse Growing

Discussed on Reddit

Cline v3.4 update adds an MCP Marketplace, mermaid diagrams in Plan mode, @termi — Reddit · 87 pts
Built an MCP server for "live" Mermaid diagrams — Reddit · 14 pts
Mermaid MCP Server – A Model Context Protocol server that converts Mermaid diagr — Reddit · 5 pts

3 mentions across 1 sources

Reviewer notes

Auto-scanned review. These are observations, not a security certification.

catalog_hygiene stale-eval refresh: Scored from trust signals (evidence-eval-v1): 604 GitHub stars; 12 contributors; last commit 56d ago; license MIT.

Things to check

Diagram quality depends on Claude's interpretation of your description; complex or ambiguous requirements may need iterative refinement. Rendering performance scales with diagram size, and very large diagrams may require explicit simplification.

How to evaluate tools before deploying →

Data shown here comes from public APIs and automated scanning. Reviewer notes reflect one person's experience. This is not a security certification or legal recommendation. Always evaluate tools according to your own organization's policies.

Evaluation Scores

Evaluation

Ease of Use

4/5

Versatility

4/5

Reliability

4/5

Security

3/5

Overall score3.85 / 5.00 SolidEvaluatedJul 2026

catalog_hygiene stale-eval refresh: Scored from trust signals (evidence-eval-v1): 604 GitHub stars; 12 contributors; last commit 56d ago; license MIT.

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