lemlist

lemlist Contacts API

CRM-side contacts, contact lists, list membership and exports.

GitHub OpenAPI
Business capability
Customer Data Management BC-420.10

Operations 8

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /contacts/{idOrEmail} Look up one contact by id or email · Get contact #
Ask an LLM
“Can I pull up a single contact using just their email address?”
“Where do I see everything stored on one person in my CRM contacts?”
Tell an agent
Show me the contact {idOrEmail}.
Look up the contact record for {idOrEmail}.
DELETE /contacts/{idOrEmail} Delete a contact and everything tied to it · Delete Contact #
Ask an LLM
“What else gets removed when I delete a contact, like their leads and conversations?”
“Does deleting a contact in lemlist also delete it in my CRM?”
Tell an agent destructive · confirm first
Delete contact {idOrEmail}.
Permanently remove {idOrEmail} along with their leads and activities.
GET /contacts List all my contacts · Get contacts #
Ask an LLM
“Which contacts are in my lemlist CRM?”
“How can I browse every person I've stored as a contact?”
Tell an agent
List all my contacts.
Pull my full contact list.
POST /contacts Create or update a contact · Add and update contact #
Ask an LLM
“How do I add a person, or update them if their email already exists?”
“Can I link a contact to a company by its domain when saving it?”
Tell an agent
Add contact {email} named {firstName} {lastName}.
Upsert the contact at {linkedinUrl} with job title {jobTitle}.
GET /contacts/lists List my contact lists · Get Contact Lists #
Ask an LLM
“Which static and dynamic contact lists does my team have?”
“Can I find a contact list by part of its name?”
Tell an agent
Show all my contact lists.
Find contact lists whose name contains {search}.
POST /contacts/lists Create a static contact list · Create Contact List #
Ask an LLM
“How do I make a new static list to group contacts?”
“What's the maximum length of a contact list name?”
Tell an agent
Create a contact list named {name}.
Make a new static list called {name} for my contacts.
POST /contacts/lists/{listId}/entities Add or remove contacts in a static list · Add or Remove Contacts in a List #
Ask an LLM
“How do I put existing contacts into a static list?”
“Can I take contacts back out of a list without deleting them?”
Tell an agent
Add contacts {contactIds} to list {listId}.
Run action {action} on list {listId} for contacts {contactIds}.
GET /contacts/export Export a contact list as CSV · Export Contact List #
Ask an LLM
“How do I download a CRM list of contacts as a CSV file?”
“Can I export the companies in a list instead of the people?”
Tell an agent
Export list {listId} to CSV.
Export the {entity} records from list {listId} as a spreadsheet.

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/openapi/lemlist-contacts-api-openapi.yml

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OpenAPI Specification

lemlist-contacts-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Lemlist Contacts API
  version: 1.0.0
  description: 'Operations tagged Contacts across 2 of this provider''s published API definitions: lemlist-openapi-v1-legacy.json, lemlist-openapi-v2.json. Each path carries the servers of the definition it was published in.'
servers:
- url: https://api.lemlist.com/api
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/openapi/lemlist-contacts-api-openapi.yml