Point Claude, ChatGPT, Cursor, or any MCP client at Kiln and let it draft brands, read the catalog, and check demand for you. The REST API and the MCP server are free and public on every plan, paid or not. Reads need no key. Writes act as you once you sign in, or take a key.
A real Model Context Protocol server over streamable HTTP, with two doors. Interactive clients sign in with your Kiln account. Scripts and agents use the keyless endpoint and add a key only for writes. Either way your assistant gets eleven tools: generate_drafts, get_catalog, get_demand, search, and fetch, plus the draft and design tools below.
https://joinkiln.com/mcpFor Claude, ChatGPT, Cursor, VS Code, and any client that can open a sign-in window. Reads and writes act as you. No key to paste.
https://joinkiln.com/api/mcpReads are free with no auth at all. Writes need an api_key minted on this page, or an OAuth bearer token.
Point the client at the sign-in endpoint. When it asks, sign in with your Kiln account; reads and writes then act as you. There is no key to paste.
Settings, then Connectors, then Add custom connector.
https://joinkiln.com/mcp
In a terminal, then use /mcp inside a session to check the connection.
claude mcp add --transport http kiln https://joinkiln.com/mcp
The Kiln sign-in opens in your browser the first time the server is used.
Settings, then Connectors, then Advanced, turn Developer mode on, then Create.
https://joinkiln.com/mcp
ChatGPT's connector requires search and fetch tools. Kiln provides both.
One click, or drop the file in your project.
Add to Cursor{
"mcpServers": {
"kiln": {
"url": "https://joinkiln.com/mcp"
}
}
}One click, or drop the file in your workspace.
Install in VS Code{
"servers": {
"kiln": {
"type": "http",
"url": "https://joinkiln.com/mcp"
}
}
}In Windsurf's MCP settings, or edit the config file directly.
{
"mcpServers": {
"kiln": {
"serverUrl": "https://joinkiln.com/mcp"
}
}
}Kiln has not verified the sign-in window in this client yet. If it does not open, use Paste a key.
In a terminal.
gemini mcp add --transport http kiln https://joinkiln.com/mcp
Kiln has not verified the sign-in window in this client yet. If it does not open, use Paste a key.
In a terminal.
codex mcp add kiln --url https://joinkiln.com/mcp
Kiln has not verified the sign-in window in this client yet. If it does not open, use Paste a key.
In the client's MCP settings, add a stdio server that runs mcp-remote. It bridges to Kiln over HTTP and handles the sign-in.
npx -y mcp-remote https://joinkiln.com/mcp
{
"mcpServers": {
"kiln": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://joinkiln.com/mcp"
]
}
}
}Kiln has not verified the sign-in window in this client yet. If it does not open, use Paste a key.
generate_draftsOne sentence in, three product brand drafts out, each with real margin math.
get_catalogEverything Kiln can make one at a time, with margin math at the flat 5% fee.
get_demandWhat converts on the network this week, computed nightly.
searchKeyword search across what Kiln exposes, returning ids and snippets. One of the two tools ChatGPT's connector requires.
fetchLoad one search result by id, in full. The other tool ChatGPT's connector requires.
refine_draftRevise drafts with one plain-words instruction. AI when configured and within the daily budget, deterministic otherwise; the reply says which ran.
swap_lookDeterministic recombination, no AI: keep the product and re-roll the look, or keep the name and move it onto another catalog item.
get_store_designRead a store's current theme by slug, sanitized before it leaves.
suggest_store_designsThree coherent design directions from a brand's own words. Falls back to deterministic output in the sandbox, labeled.
edit_store_designOne plain-words instruction in, the edited theme and a list of what moved out. Nothing is saved.
set_store_designkeyKeyed. Write a theme to a store you own. Owner-checked and size-capped server side.
On the sign-in endpoint, writes act as you. On the keyless endpoint they take an API key minted on this page. Every theme, whether read, suggested, edited, or saved, passes server-side validation and contrast repair before it touches a store.
Plain JSON over HTTPS with permissive CORS. Four public endpoints need no key. The one keyed write takes a bearer key from below; keys come with the $29 plan.
/api/v1/draftsOne sentence in, three honest drafts out. Deterministic sandbox output.
/api/v1/themeA brand idea in, three storefront themes out, each sanitized so it always reads.
/api/v1/catalogEverything Kiln can make one at a time, with real margin math at the flat 5% fee.
/api/v1/demandWhat converts on the network this week, computed nightly.
/api/v1/brandskeyKeyed. The best draft for your prompt plus the create URL. Keys come with the $29 plan. Programmatic launch lands with keys v2.
curl -X POST https://joinkiln.com/api/v1/drafts \
-H "Content-Type: application/json" \
-d '{"prompt": "a candle brand for people who hike"}'Keys are minted and signed server side once your store is live. The full key shows once at mint time and is never stored.
Revoking a key is enforced server side: the key stops working at once on the instance that served the revoke and within a minute everywhere else. If a key leaked, revoke it and rotate anything sensitive.
Write access keys come with going live.
$29/mo flat unlocks live checkout, growth studio, channels, priority production, the higher AI cap, and write keys. Reads stay free without it.
Go live · $29/mo