# Customer.io Newsletter Variants API

**Canonical:** https://apis.io/apis/customer-io/customer-io-newsletter-variants-api/  
**Provider:** Customer.io — https://apis.io/providers/customer-io/  
**Base URL:** https://track.customer.io  
**Documentation:** https://docs.customer.io/integrations/api/track/

Customer.io Newsletter Variants API is one of 42 APIs that [Customer.io](https://apis.io/providers/customer-io/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Newsletter Variants. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

A newsletter variant is a translation or an A/B test. You can create, update, or delete variants in newsletters from these endpoints. You can also create a new A/B test group. If your newsletters include assets like images or PDFs, host them in your [workspace's assets](/integrations/api/app/#tag/assets) or at another public URL, and include the URL in your message content.

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/customer-io/refs/heads/main/openapi/customer-io-newsletter-variants-api-openapi.yml
- **Documentation** — https://docs.customer.io/integrations/api/app/
- **Documentation** — https://docs.customer.io/integrations/data-in/connections/http-api/

## Other Customer.io APIs (12)

- [Customer.io Track API](https://apis.io/apis/customer-io/track-api/)
- [Customer.io Activities API](https://apis.io/apis/customer-io/customer-io-activities-api/)
- [Customer.io Alias API](https://apis.io/apis/customer-io/customer-io-alias-api/)
- [Customer.io Batch API](https://apis.io/apis/customer-io/customer-io-batch-api/)
- [Customer.io Broadcasts API](https://apis.io/apis/customer-io/customer-io-broadcasts-api/)
- [Customer.io Campaigns API](https://apis.io/apis/customer-io/customer-io-campaigns-api/)
- [Customer.io Collections API](https://apis.io/apis/customer-io/customer-io-collections-api/)
- [Customer.io Customers API](https://apis.io/apis/customer-io/customer-io-customers-api/)
- [Customer.io Exports API](https://apis.io/apis/customer-io/customer-io-exports-api/)
- [Customer.io Group API](https://apis.io/apis/customer-io/customer-io-group-api/)
- [Customer.io Identify API](https://apis.io/apis/customer-io/customer-io-identify-api/)
- [Customer.io Messages API](https://apis.io/apis/customer-io/customer-io-messages-api/)

## Tags

Newsletter Variants

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