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lemlist

lemlist Leads API

Leads inside campaigns - create with optional enrichment, update, pause, resume, mark interested, custom variables, CRM import and unsubscribe.

Documentation Provider Profile APIs.io OpenAPI GitHub

lemlist Leads API is one of 22 APIs that lemlist publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Leads. The published artifact set on APIs.io includes an OpenAPI specification.

This API exposes 22 operations across 16 paths, and defines 1 schema. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against a single base URL, https://api.lemlist.com/api.

22 operations 16 paths 1 schemas 4 DELETE4 GET2 PATCH12 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://api.lemlist.com/api
Authentication
HTTP Basic
Resource Areas
1

Authentication & Security 1

lemlist Leads API declares 1 security scheme for authenticating requests. It accepts HTTP basic authentication (basicAuth).

Paths & Operations 22

Across 16 paths, the API surfaces 22 operations — 4 DELETE, 4 GET, 2 PATCH, 12 POST. Each is listed below with its method, path, parameters, and response codes.

Leads 22
POST
/leads/start/{leadId}
Resume a paused Lead
2 params → 200
POST
/leads/pause/{leadId}
Pause a Lead
3 params → 200default
POST
/leads/interested/{leadIdOrEmail}
Mark a Lead as interested
2 params → 200
POST
/leads/notinterested/{leadIdOrEmail}
Mark a Lead as not interested
2 params → 200
POST
/campaigns/{campaignId}/leads/{leadIdOrEmail}/interested
Mark a Lead as interested in one campaign
3 params → 200
POST
/campaigns/{campaignId}/leads/{leadIdOrEmail}/notinterested
Mark a Lead as not interested in one campaign
3 params → 200
GET
/leads/{email}
Retrieve Lead with email
3 params → 200default
GET
/leads
Retrieve Lead with email or id
4 params → 200default
POST
/campaigns/{campaignId}/leads/{email}
Create Lead in a Campaign
8 params body → 200400
DELETE
/campaigns/{campaignId}/leads/{email}
Unsubscribe Lead from Campaign
2 params → 200404
PATCH
/campaigns/{campaignId}/leads/{leadId}
Update Lead
3 params body → 200404500
DELETE
/campaigns/{campaignId}/leads/{leadId}
Delete Lead
3 params → 200404
POST
/leads/{leadId}/variables
Add variables
4 params → 200400
PATCH
/leads/{leadId}/variables
Update variables
4 params → 200400
DELETE
/leads/{leadId}/variables
Delete variables
4 params → 400
POST
/leads/audio
Upload an audio file to a voice message step
2 params → default
GET
/crm/filters
Get CRM filters
4 params → 200401
POST
/campaigns/{campaignId}/leads/import
Import leads from CRM
2 params body → 200401
GET
/campaigns/{campaignId}/leads/
Get Campaign Leads
3 params → 200
POST
/campaigns/{campaignId}/leads/
Create Lead in Campaign
6 params body → 200400401403404
DELETE
/campaigns/{campaignId}/leads/
Unsubscribe Lead from Campaign
1 param → 200400401404
POST
/leads/review/{leadId}
Launch Lead
1 param → 200400401404405

Schemas 1

The contract defines 1 schema that model the data the API accepts and returns. The most detailed is CrmFilter (4 properties). Each schema is shown below with its type and property counts.

CrmFilter
object
A filter used in the CRM to segment leads or companies.
4 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

lemlist-leads-api-openapi.yml Raw ↑

Other APIs lemlist publishes across the network.

lemlist MCP Server
AE Profile APIs.io
lemlist Campaigns API
AE Profile APIs.io
lemlist Sequences API
AE Profile APIs.io
lemlist People Database API
AE Profile APIs.io
lemlist Enrich API
AE Profile APIs.io
lemlist Inbox API
AE Profile APIs.io
lemlist Contacts API
AE Profile APIs.io
lemlist Companies API
AE Profile APIs.io
lemlist Signal Agents API
AE Profile APIs.io
lemlist Webhooks API
AE Profile APIs.io
lemlist Unsubscribes API
AE Profile APIs.io
lemlist Schedules API
AE Profile APIs.io
#Leads
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API Details
ID
lemlist:lemlist-leads-api
Base URL
https://api.lemlist.com/api
Docs
https://developer.lemlist.com/api-reference/endpoints/leads/create-lead-in-campaign
Provider
lemlist
APIs.io →  GitHub →
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