Posted by the APIs.io catalog. APIs.io does not own or sell this API; access comes from the provider, lemlist.
The lemlist Campaigns API covers campaign CRUD and lifecycle: create, update, duplicate, start and pause campaigns, check validation statutes, pull stats and reports, and run asynchronous exports. It is a hosted REST API at https://api.lemlist.com/api, suited to sales and growth teams, agencies and developers who want to manage cold outreach campaigns from their own tools instead of the lemlist app.
lemlist is a sales engagement and cold outreach platform from lempire. It covers multichannel campaigns across email, LinkedIn, phone, SMS and WhatsApp, a 650M+ record B2B lead database, enrichment, a unified reply inbox and lemwarm deliverability warm-up. The provider's wider developer surface has a 143-operation REST API, a hosted remote MCP server, an official CLI, an llms.txt index, a published Agent Skill and a 76-event webhook catalog.
Published for this API: an OpenAPI description.
Provider ratings in the catalog: Kin Score 76 (exemplar band); Agent Readiness 65 (agent-ready band), scored 2026-11-02.
Access: self-serve signup with a 14-day free trial.
Pricing: set by the provider.
Condition: a live hosted API, listed in the APIs.io catalog.
Catalog listing: https://apis.io/apis/lemlist/lemlist-campaigns-api/ Provider: https://www.lemlist.com