Named after turmeric · free for AI agents
Give your agent better email design taste
Curcuma helps your coding agent write better emails. It looks at about 20,000 real emails from 4,000+ brands — then your agent builds from what actually works.
Like the spice: strong, real, hard to fake. Not a send tool. Not a drag-and-drop builder. Your agent writes the HTML. We are the library.
Free for agents · free for people
Works with Claude Code, Cursor, Codex, and moreWhat you get
A big library of real emails
About 20,000 emails brands actually sent. Search by goal, brand, or topic. Your agent learns from real work — not from a guess.
Short design notes (not huge files)
Each summary is about 3KB. It covers layout, colors, and buttons. Free for people and agents. No account needed — your agent can set itself up with a free key.
Your agent writes the HTML
You can ask for a plain template, or ready HTML. Paste it into Resend, Klaviyo, or any tool you use. We never touch your mailing list or send emails for you.
Skills we include
These install with the setup command. You can also browse them on this site. Source files live in the skills/ folder.
Email design
Write a new email from your brief. Search, study a few examples, then build the HTML.
Improve & fix
Fix email HTML you already have. Check Outlook, phones, and dark mode against real patterns.
Research
See how brands handle a kind of email. Get clear examples and simple stats.
Lifecycle / CRM
Welcome, cart, win-back, trial, and other “moment” emails — one by one or as a set.
Subject & CTA
Subject lines, preview text, and button words drawn from real emails.
Competitive
How brands in a space email a topic. Good for research, not for copying brand words.
Production
Outlook-safe buttons, mobile layout, dark mode, and footer patterns that really ship.
Router
Picks the right skill for the job — design, fix, research, and more.
Same job. One difference: real examples.
Eval brief B2: Pawprint abandoned cart, 15% off, dog must be named, cart held 24 hours. Left is the real no-reference eval output. Right uses structure from cart emails already in the corpus.
Real subjects in the library: “Did you forget something?” · “PSST: You left items in your cart” · “Thanks for exploring. We saved your cart.” · “Hey … did you forget something?”
// Left: briefs/overnight/eval_outputs/B2_A.txt. Right: B2_B_render + hey-smiles-davis-did-you-forget-something, thanks-for-exploring-we-saved-your-cart, did-you-forget-something-masterclass.
What this is (and is not)
Not this
An AI tool that writes and sends campaigns for you. We never open your list or send mail.
Not this either
A preview tool like Litmus (how mail looks in inboxes). We help before you write.
This
A library + skills for your coding agent. It looks up real emails while it works, then writes HTML for you to use.
Install with one command
This sets up the free tools and skills for Claude Code, Codex, and Cursor.
# skills + MCP setup curl -fsSL https://curcuma.sud.fyi/install.sh | bash # or make a key and add Claude Code yourself curl -fsS -X POST https://curcuma.sud.fyi/api/mcp/install-token claude mcp add curcuma https://curcuma.sud.fyi/mcp \ --header "Authorization: Bearer YOUR_KEY"
Step-by-step guides: Claude · Cursor · Codex. Server URL: …/mcp.
Try one of these first
Paste one after install. Each one makes the agent search, study, then write.
Design a welcome email for my product. Use Curcuma: search welcome emails, study 2–3 with get_email_summary, then give me HTML for Resend. // /curcuma-email-design
Write an abandoned-cart email for a shop brand. Pull 5 real cart emails from Curcuma. Match the structure, not the words. // same task as the proof above
Research product-launch emails in Curcuma. Sum up common layouts and buttons. Then draft my launch HTML. // research first, then design
Curcuma Skill Pack
Paste this into your coding agent.
Click the button to make a free key. You’ll get one short line with a link. Paste that line into Claude Code, Codex, Cursor, or any agent that can use MCP. The agent opens the link and finishes setup for you.
About the key: Curcuma is free. The key only lets tools look up email examples. Don’t put it in a public git repo. It’s fine in private local config on your machine.
Want the terminal command instead? See install · API:
Common questions
Why “Curcuma”?
Curcuma means turmeric. The spice that stains the pan and warms the food. Same idea here: a strong library that gives your agent real taste, not bland defaults.
Where are the skills?
In the project under skills/. The installer puts them on your machine. You can also open them on this site — see the skills list above.
Is Curcuma free?
Yes. Free for people and agents. Keys only open the library. There is no bill. We do not send email for you.
Does Curcuma send email for me?
No. Your agent writes the HTML. You paste it into your own tools. We never see your list, domain, or passwords.
Which agents work?
Claude Code, Cursor, Codex, and other tools that can connect to an MCP server with a key. See the install guides for steps.
How is this different from Lazyweb?
Same big idea, different job. Lazyweb is for app and website screens. Curcuma is for real HTML email — layout, buttons, and patterns that work in inboxes.