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MCP server

Klaviyo MCP

Klaviyo MCP: campaigns, flows, segments, metrics, reports, profiles across many accounts. 24 tools.

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https://github.com/scalably-io/klaviyo-mcp

Needs credentials

KLAVIYO_KEY_MAIN, KLAVIYO_API_BASE, KLAVIYO_RETRY_BASE_MS

Install
npx -y @scalably-io/klaviyo-mcp

Original content

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Klaviyo MCP

Klaviyo MCP server. 24 read-only tools cover campaigns, flows, segments, metrics, reports, and profiles across many accounts.

Install

Claude Code:

claude mcp add klaviyo -e KLAVIYO_KEY_MAIN=pk_your_key -- npx -y @scalably-io/klaviyo-mcp

Codex:

codex mcp add klaviyo --env KLAVIYO_KEY_MAIN=pk_your_key -- npx -y @scalably-io/klaviyo-mcp

Claude Desktop: download klaviyo-mcp.mcpb from the latest GitHub release and open it. Claude Desktop's install form only accepts one account (KLAVIYO_KEY_MAIN).

Setup

  1. Create a private API key in Klaviyo under Settings > API Keys.
  2. Set one KLAVIYO_KEY_<name>=pk_xxx environment variable per account, for example KLAVIYO_KEY_MAIN or KLAVIYO_KEY_STOREONE. The server auto-discovers every KLAVIYO_KEY_* variable at startup; list_accounts shows what it found.
  3. Multiple Klaviyo accounts (agencies, multi-brand portfolios) work only through Claude Code or Codex, since both let you pass arbitrary extra environment variables. Add as many KLAVIYO_KEY_<name> variables as you have accounts, then call tools with the matching account argument (the name after KLAVIYO_KEY_, lowercased).
  4. All 24 tools are read-only.

Tools (24)

ToolWhat it does
list_accountsList all configured Klaviyo accounts. Use this first to see which brands are available.
list_campaignsList recent email campaigns for a specific Klaviyo account. Returns campaign IDs, names, status, and send dates.
campaign_reportGet email campaign performance metrics for a Klaviyo account. Returns opens, clicks, revenue, bounce rate, unsubscribes for the specified time period.
list_metricsList available metrics for a Klaviyo account. Use this to find the 'Placed Order' metric ID needed for revenue reporting.
multi_account_summaryPull campaign performance summary from ALL configured Klaviyo accounts. Returns a unified cross-brand report.
flow_reportGet email flow (automation) performance for a Klaviyo account. Returns metrics for welcome series, abandoned cart, post-purchase, etc.
campaign_ab_reportGet per-variation (A/B arm) email/SMS campaign metrics for a Klaviyo account. Splits results by variation so you can compare arms.
flow_series_reportTime-series flow (automation) metrics for a Klaviyo account. Buckets by interval.
segment_reportSegment performance metrics for a Klaviyo account: member counts, additions, removals.
form_reportSign-up form performance for a Klaviyo account: views, submissions, submit rate.
list_segmentsList all segments in a Klaviyo account with name, member count, and creation date.
list_listsList all email lists in a Klaviyo account with name, opt-in process, and creation date.
list_flowsList all flows (automations) in a Klaviyo account with name, status, trigger type, and last updated.
get_campaign_detailGet full details for a single campaign by ID: name, status, send_time, subject, preview text, channel, and message IDs.
list_suppressed_profilesList profiles suppressed from email marketing for a single reason. Klaviyo only allows equals (not any) for suppression.reason, so call once per reason for a full picture.
metric_aggregateAggregate values for any Klaviyo metric (e.g. opens, clicks, revenue) over a custom timeframe and interval.
get_templateFetch an email template by ID, including HTML/text content. Use for audit/preview.
list_recent_eventsList recent events for a Klaviyo account, optionally filtered by metric_id (e.g. Placed Order). Returns up to 100 most recent.
account_infoGet Klaviyo account metadata: org name, timezone, currency, contact email, industry.
list_tagsList all tags in a Klaviyo account (used to label campaigns, flows, segments, lists).
list_templatesList email templates in a Klaviyo account (name, editor type, dates). Use get_template for the HTML of one.
get_profileLook up a customer profile by email or profile ID: name, location, and email-marketing consent/suppression status.
get_flow_detailGet a flow's structure by ID: status, trigger, and its actions/steps (type, message channel). Use list_flows for IDs.
custom_reportExpert escape hatch: run any Klaviyo values or series report with full control over statistics, group_by, filter, interval, and timeframe.

Configuration

VariableRequiredPurpose
KLAVIYO_KEY_MAIN (or any KLAVIYO_KEY_<name>)yesPrivate API key for one Klaviyo account. One variable per account; the name after KLAVIYO_KEY_ becomes the account argument.
KLAVIYO_API_BASEnoOverride the Klaviyo API base URL (default https://a.klaviyo.com/api)
KLAVIYO_RETRY_BASE_MSnoBase delay in milliseconds for the retry backoff (default 1000)

Reply shape

Every tool returns plain JSON with status (succeeded, partial, no_op), operation, summary, target, result, proof, warnings, recovery. Failures throw a plain error string: : <message> <hint>.

Limits

Reporting endpoints (campaign_report, flow_report, campaign_ab_report, flow_series_report, segment_report, form_report, custom_report for values/series reports) are rate limited by Klaviyo to 2 requests per minute per account. Reporting data is only available from 2023-06-01 onward; a custom range starting earlier is clamped to that floor. A single reporting request cannot span more than one calendar year, so a longer custom range is auto-windowed into consecutive yearly chunks with a spacing delay between them.

Verify

Each release lists the package version, the .mcpb sha256 and the production commit it was derived from in CHANGELOG.md. CI runs the tests and a clean install of the packed tarball on every push.

Privacy Policy

This server runs locally, on your machine, under your own credentials. It collects no personal data, contains no telemetry, stores nothing persistently, and talks only to the vendor API it wraps. No third party, including Scalably, receives your data. Contact: hello@scalably.io. Canonical copy: https://scalably.io/connector-privacy.html

License

MIT. Copyright Scalably.

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