Klaviyo MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 11 installs a week from npm. Last commit 9 Sep 2026.
Klaviyo MCP: campaigns, flows, segments, metrics, reports, profiles across many accounts. 24 tools.
What the code does
We read the source, 5 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
for (const [key, value] of Object.entries(process.env)) {
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add klaviyo-mcp -e 'KLAVIYO_KEY_MAIN=<KLAVIYO_KEY_MAIN>' -- npx -y @scalably-io/klaviyo-mcp{
"mcpServers": {
"klaviyo-mcp": {
"command": "npx",
"args": [
"-y",
"@scalably-io/klaviyo-mcp"
],
"env": {
"KLAVIYO_KEY_MAIN": "<KLAVIYO_KEY_MAIN>"
}
}
}
}[mcp_servers.klaviyo-mcp]
command = "npx"
args = ["-y", "@scalably-io/klaviyo-mcp"]
env = { KLAVIYO_KEY_MAIN = "<KLAVIYO_KEY_MAIN>" }{
"mcpServers": {
"klaviyo-mcp": {
"command": "npx",
"args": [
"-y",
"@scalably-io/klaviyo-mcp"
],
"env": {
"KLAVIYO_KEY_MAIN": "<KLAVIYO_KEY_MAIN>"
}
}
}
}{
"servers": {
"klaviyo-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@scalably-io/klaviyo-mcp"
],
"env": {
"KLAVIYO_KEY_MAIN": "<KLAVIYO_KEY_MAIN>"
}
}
}
}Put your own value in place of
<KLAVIYO_KEY_MAIN> (Private API key for your main Klaviyo account. Add more accounts with extra KLAVIYO_KEY_<name> variables).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
KLAVIYO_API_BASE (Klaviyo API base URL, default https://a.klaviyo.com/api), KLAVIYO_RETRY_BASE_MS (Base delay in milliseconds for the retry backoff, default 1000).
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Klaviyo MCP — questions
Answers built from our own checks of this server.