# lemlist REST API

**Canonical:** https://apis.io/apis/lemlist/rest-api/  
**Provider:** lemlist — https://apis.io/providers/lemlist/  
**Base URL:** https://api.lemlist.com/api  
**Documentation:** https://developer.lemlist.com

lemlist REST API is one of 22 APIs that [lemlist](https://apis.io/providers/lemlist/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Email Outreach, Sales Engagement, Cold Email, and Sales Automation. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and a getting-started guide.

The full lemlist REST API - 143 operations across campaigns, sequences, leads, contacts, companies, the B2B people database, enrichment, the unified inbox, Signal Agents, unsubscribes, webhooks, lemwarm and deliverability alerts. All routes live under https://api.lemlist.com/api. Authentication is an API key carried as HTTP Basic with an empty username. lemlist publishes the OpenAPI at developer.lemlist.com/api-reference/openapi/v2.json.

## Machine-readable artifacts (8)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/openapi/_original/lemlist-openapi-v2.json
- **Documentation** — https://developer.lemlist.com
- **APIReference** — https://developer.lemlist.com/api-reference/getting-started/overview
- **GettingStarted** — https://developer.lemlist.com/api-reference/getting-started/overview
- **Examples** — https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/examples/lemlist-examples.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/overlays/lemlist-api-overlay.yaml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/data-model/lemlist-data-model.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/apis.yml

## Other lemlist APIs (12)

- [lemlist MCP Server](https://apis.io/apis/lemlist/mcp-server/)
- [lemlist Campaigns API](https://apis.io/apis/lemlist/lemlist-campaigns-api/)
- [lemlist Sequences API](https://apis.io/apis/lemlist/lemlist-sequences-api/)
- [lemlist Leads API](https://apis.io/apis/lemlist/lemlist-leads-api/)
- [lemlist People Database API](https://apis.io/apis/lemlist/lemlist-people-database-api/)
- [lemlist Enrich API](https://apis.io/apis/lemlist/lemlist-enrich-api/)
- [lemlist Inbox API](https://apis.io/apis/lemlist/lemlist-inbox-api/)
- [lemlist Contacts API](https://apis.io/apis/lemlist/lemlist-contacts-api/)
- [lemlist Companies API](https://apis.io/apis/lemlist/lemlist-companies-api/)
- [lemlist Signal Agents API](https://apis.io/apis/lemlist/lemlist-signal-agents-api/)
- [lemlist Webhooks API](https://apis.io/apis/lemlist/lemlist-webhooks-api/)
- [lemlist Unsubscribes API](https://apis.io/apis/lemlist/lemlist-unsubscribes-api/)

## Tags

Email Outreach, Sales Engagement, Cold Email, Sales Automation

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/lemlist/rest-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/lemlist/.