comfyui-mcp (miller-joe/comfyui-mcp) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 15 tools. No publisher has claimed this listing.

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C
Caution
74/100

comfyui-mcp

MCP server for ComfyUI — text-to-image, variations, img2img refine, upscale, image proxy, and workflow runner.

→ miller-joe/comfyui-mcp· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

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Who stands behind it

miller-joe

Source: Glama

Is this your MCP?

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configCOMFYUI_DEFAULT_CKPTDefault checkpoint filename
configCOMFYUI_PUBLIC_URLExternal URL in image URLs returned to clients. Set this when the internal URL is not reachable from MCP clients (common with Docker networks).
configCOMFYUI_TEMPLATES_DIR
configCOMFYUI_URLComfyUI HTTP URL used internally by this server
configMCP_HOSTBind host (HTTP mode only)
configMCP_PORTBind port (HTTP mode only)
configMCP_TRANSPORTSpeak MCP over stdio instead of HTTP. Use when launched as a subprocess by a stdio-first MCP client (Claude Desktop, mcp-inspector).
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

15/15 tools missing one or more hints — generate_with_controlnet (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); generate_with_ip_adapter (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); generate_image (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +12 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Destructive tools are labelled

1 tool perform destructive updates without destructiveHint — delete_workflow_template deletes at line 224 (fs.unlink(templatePath(store.dir, args.name)))

Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.

Tool test coverage

Only 3/15 tools referenced in tests (20%)

Write tests that reference each tool by name so every tool has at least one test.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/miller-joe/comfyui-mcp?variant=verified)](https://m8ven.ai/mcp/miller-joe/comfyui-mcp)
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commit: 9f3481f80673c6d7d79faaa2143eacfd358c9e53
code hash: f836359ac5ea4ec944f36d6a3ed5d4a61fe6e3b242a30d43a4bda8496aa8a1d3
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