lemlist website screenshot

lemlist

lemlist is a cold email outreach and sales engagement platform that helps sales teams build prospect lists, personalize multichannel campaigns across email and LinkedIn, and automate follow-ups to book more meetings. It includes a built-in B2B lead database, AI-generated personalization, and warm-up tools to keep deliverability healthy. The lemlist API enables developers to integrate lemlist with other tools and automate outreach workflows using API key authentication.

lemlist publishes 3 APIs on the APIs.io network: Campaigns API, Team API, and Users API. Tagged areas include Email Outreach, Sales Engagement, Cold Email, Sales Automation, and LinkedIn Outreach.

lemlist’s developer surface includes authentication, documentation, pricing, signup flow, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
27.4/100 emerging ▬ flat Agent 28/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessSelf serve
4 APIs
Email OutreachSales EngagementCold EmailSales AutomationLinkedIn OutreachLead Generation

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 27.4/100 · emerging
Contract Quality 13.5 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 2.1 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 28/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/lemlist: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

lemlist REST API

REST API for managing campaigns, leads, sequences, teams, and outreach activities in lemlist. Authentication is via API key passed using HTTP Basic auth. The API supports integr...

lemlist Campaigns API

Campaign CRUD and lifecycle

lemlist Team API

Team-level endpoints (info, senders, credits)

lemlist Users API

User endpoints

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

lemlist API

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

lemlist GraphQL Schema

Conceptual GraphQL schema for the [lemlist](https://www.lemlist.com) sales engagement and email outreach automation platform. lemlist enables sales teams to build prospect lists...

GRAPHQL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Lemlist Authentication

http · 1 scheme

SECURITY

Lemlist Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Lemlist Agentic Access

7 operations · 1 acting

7 operations · 1 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup
Signup

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: lemlist
name: lemlist
description: lemlist is a cold email outreach and sales engagement platform that helps sales teams build prospect lists, personalize
  multichannel campaigns across email and LinkedIn, and automate follow-ups to book more meetings. It includes a built-in
  B2B lead database, AI-generated personalization, and warm-up tools to keep deliverability healthy. The lemlist API enables
  developers to integrate lemlist with other tools and automate outreach workflows using API key authentication.
type: Index
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/lemlist.png
tags:
- Email Outreach
- Sales Engagement
- Cold Email
- Sales Automation
- LinkedIn Outreach
- Lead Generation
url: https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.19'
apis:
- aid: lemlist:rest-api
  name: lemlist REST API
  description: REST API for managing campaigns, leads, sequences, teams, and outreach activities in lemlist. Authentication
    is via API key passed using HTTP Basic auth. The API supports integrating lemlist with CRMs and other tools and automating
    multichannel outreach workflows.
  humanURL: https://developer.lemlist.com
  baseURL: https://api.lemlist.com/api
  tags:
  - Email Outreach
  - Sales Engagement
  - Cold Email
  - Sales Automation
  properties:
  - type: Documentation
    url: https://developer.lemlist.com
  - type: GettingStarted
    url: https://developer.lemlist.com/api-reference/overview
  - url: graphql/lemlist-graphql.md
    type: GraphQL
- aid: lemlist:lemlist-campaigns-api
  name: lemlist Campaigns API
  description: Campaign CRUD and lifecycle
  humanURL: https://developer.lemlist.com
  baseURL: https://api.lemlist.com/api
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/lemlist-campaigns-api-openapi.yml
- aid: lemlist:lemlist-team-api
  name: lemlist Team API
  description: Team-level endpoints (info, senders, credits)
  humanURL: https://developer.lemlist.com
  baseURL: https://api.lemlist.com/api
  tags:
  - Team
  properties:
  - type: OpenAPI
    url: openapi/lemlist-team-api-openapi.yml
- aid: lemlist:lemlist-users-api
  name: lemlist Users API
  description: User endpoints
  humanURL: https://developer.lemlist.com
  baseURL: https://api.lemlist.com/api
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/lemlist-users-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/lemlist-agentic-access.yml
- type: DomainSecurity
  url: security/lemlist-domain-security.yml
- type: Authentication
  url: authentication/lemlist-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/lemlist
- type: Website
  url: https://www.lemlist.com
- type: Documentation
  url: https://developer.lemlist.com
- type: Pricing
  url: https://www.lemlist.com/pricing
- type: Signup
  url: https://app.lemlist.com/signup
- type: LlmsText
  url: https://api.lemlist.com/llms.txt
- url: https://www.lemlist.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com