# OptinMonster REST API

**Canonical:** https://apis.io/apis/optinmonster/optinmonster-rest-api/  
**Provider:** OptinMonster — https://apis.io/providers/optinmonster/  
**Base URL:** https://api.optinmonster.com/v2  
**Documentation:** https://optinmonster.com/docs/

OptinMonster REST API is one of 3 APIs that [OptinMonster](https://apis.io/providers/optinmonster/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Lead Generation, Campaigns, and Marketing. The published artifact set on APIs.io includes authentication docs and rate-limit docs.

The OptinMonster application REST API. Versioned path segments (`/v1`, `/v2`) sit on api.optinmonster.com and cover campaigns, leads, sites, site origins, integrations, account, revenue attribution and the public template catalog. Authenticated with an account API key supplied in the `X-OptinMonster-ApiKey` header (legacy `omapi-key` + user pairing is still accepted). Responses are JSON; errors use a consistent `{error, code, message, status}` envelope with numeric OptinMonster codes.

## Machine-readable artifacts (6)

- **Authentication** — https://raw.githubusercontent.com/api-evangelist/optinmonster/refs/heads/main/authentication/optinmonster-authentication.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/optinmonster/refs/heads/main/errors/optinmonster-problem-types.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/optinmonster/refs/heads/main/conventions/optinmonster-conventions.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/optinmonster/refs/heads/main/rate-limits/optinmonster-rate-limits.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/optinmonster/refs/heads/main/data-model/optinmonster-data-model.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/optinmonster/refs/heads/main/apis.yml

## Other OptinMonster APIs (2)

- [OptinMonster WordPress Plugin API](https://apis.io/apis/optinmonster/optinmonster-wordpress-plugin-api/)
- [OptinMonster JavaScript Events API](https://apis.io/apis/optinmonster/optinmonster-javascript-events-api/)

## Tags

Lead Generation, Campaigns, Marketing

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