Siren MCP · Cursor
Marketing from inside Cursor
The agent in Cursor already knows what changed in your product. Give it Siren and it can turn that change into an on-brand video or image and post it, without you opening another app.
> make a launch video for today’s release ✓ render_asset launch video, 18s > post it to X and LinkedIn ✓ post_run posted
set up
Add it to mcp.json
- 1
Open Settings, then Tools & MCP, or paste this into ~/.cursor/mcp.json.
- 2
Approve once at app.mysiren.ai/connect.
- 3
Connect your channels in the Siren dashboard and turn on Allow posting.
{ "mcpServers": { "siren": { "url": "https://mcp.mysiren.ai/mcp" } } }The agent finishes, the post goes out
When the agent wraps up a feature, ask it for the announcement in the same chat. It sends Siren the prompt. Siren renders the video or still in your colors, type and logo, writes the caption and posts it, or schedules it for later.
You review in the Siren workspace if you want to. You can also let it run.
Prompts to start with
- Write a prompt from the last three commits and make a feature video for X.
- Make a square still for LinkedIn about the new pricing page.
- Schedule the finished run for Thursday 3pm in America/New_York on X and LinkedIn.
- Show me the last five runs and which ones were posted.
Keep marketing next to the code
Most solo founders post when they remember, which is rarely. With Siren in Cursor, every merge is a chance to post, and it takes one sentence instead of an afternoon.
faq
Straight answers.
Does it work in Cursor agent mode?
Yes. Siren shows up as a set of MCP tools the agent can call, the same way any other MCP server does.
Which plan do I need?
Any plan, Spark included. Videos are the one thing that needs Pro or above.
Where do the posts go?
Only to channels you connected in the Siren dashboard: X, LinkedIn, YouTube or TikTok (with your OK on each post).
Can I see the video before it posts?
Yes. Every render is saved in your workspace. Leave Allow posting off and the agent can only make assets, not publish them.
siren mcp
Pick your agent.
a thousand voices, one signature
Every merge can be a post.
Add one line to mcp.json and Cursor can ship your marketing.
