Check out this custom node pack https://github.com/daceheg/ComfyUI-civitai-mcp
Can be installed from inside the app using the "Manager" -> "Custom Nodes Manager" option if you search on "ComfyUI Civitai MCP"
README on the github link has examples and instructions.
Be sure to observe the new rate limits on Posting:
• A shared post creation quota now applies to both single-image and batch posts.
• New accounts (<24h): capped at 2 posts/day.
• Base accounts: capped at 20 posts/day.
• Experienced accounts (Score ≥ 1,000): scaled to 60 posts/day.
• Power accounts (Score ≥ 5,000): scaled to 150 posts/day.
• Impact: If users loop-generate and auto-post in ComfyUI, they will now hit a rate limit exception (HTTP 429) once they exceed their daily cap.