Be the first to get access to new connectors. Get early access →
ConnectorBay Early access

lemlist (BYOK) — connector documentation

  • MCP endpoint: https://byok-lemlist.connectorbay.com/mcp
  • REST API: POST https://byok-lemlist.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-lemlist.connectorbay.com/openapi.json
  • Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
  • Authentication: your own lemlist lemlist API key (sent as the Basic-auth password, empty username), sent in the X-Upstream-Key header of every request (never stored, logged or cached)
  • Health: https://byok-lemlist.connectorbay.com/health · Tool schemas: https://byok-lemlist.connectorbay.com/tools.json
  • Publisher: Unify Dynamics LLC · connectorbay.com/byok-lemlist · agent@connectorbay.com

What lemlist (BYOK) is for

lemlist (BYOK) lets an AI assistant read your own lemlist data through the lemlist API with a key you supply (lemlist API key (sent as the Basic-auth password, empty username)). Read-only: 10 tools (list_campaigns, get_campaign, get_campaign_stats, get_campaign_reports, list_campaign_leads, list_schedules, list_message_templates, list_snippets, get_team, get_team_credits). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to api.lemlist.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by lemlist. lemlist and its logos are trademarks of their owners and are used only to say which service the connector works with.

Ask your assistant things like:

  • "Which lemlist campaigns are running?"
  • "Show details of this lemlist campaign"
  • "What are the open and reply rates of this lemlist campaign in September 2026?"
  • "Compare reply counts across my lemlist campaigns"
  • "How many leads of this lemlist campaign are interested?"
  • "What sending schedules do we have in lemlist?"

What it does

  • list_campaigns: List campaigns of the team with name, status, creator, timezone and error flag, newest first by default.
  • get_campaign: Get one campaign with status, creator, timezone, labels, sender mailboxes and errors.
  • get_campaign_stats: Get performance statistics of one campaign for a date range: leads launched, reached, opened, answered, messages sent, delivered, clicked, replied, meetings booked, split by channel.
  • get_campaign_reports: Get aggregated reports for one or more campaigns: lead counts, emails sent, opened, clicked, replied, LinkedIn activity, interested and not interested.
  • list_campaign_leads: List leads of a campaign with id, contact id, state and creation date (no personal details); filter by state.
  • list_schedules: List the sending schedules of the team with name, timezone, hours and weekdays.
  • list_message_templates: List the library message templates with name, subject, body, tags and creation date; searchable by name.
  • list_snippets: List the team's snippets (reusable text fragments) with name, content and creation date.
  • get_team: Get the lemlist team: id, name, agency flag and custom domain.
  • get_team_credits: Get the remaining enrichment credits of the team (total, subscription, gifted, paid, freemium). This call itself costs nothing.

BYOK key

You bring your own lemlist lemlist API key (sent as the Basic-auth password, empty username) (https://app.lemlist.com/settings/integrations). Your assistant sends it in the X-Upstream-Key header with each request. ConnectorBay uses it for that one call only: it is never stored, logged or cached, never shown in an answer, and it is only sent to api.lemlist.com over https, with no redirects followed. Create a key with the fewest permissions the tools need (read-only if the provider offers it), and revoke it at the provider whenever you like.

Data sources

Live from the lemlist API (api.lemlist.com) with a BYOK key; documentation: https://developer.lemlist.com/api-reference/getting-started/overview. Endpoints checked against that documentation on 2026-10-16.

What it is not

Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by lemlist. lemlist and its logos are trademarks of their owners and are used only to say which service the connector works with. It is read-only: it never creates, changes, sends or deletes anything in your lemlist account.

Built for: Worldwide. Languages: English.