# OpenSRS Domains and TLS/SSL API

**Canonical:** https://apis.io/apis/tucows/opensrs-domains-and-tlsssl-api/  
**Provider:** Tucows — https://apis.io/providers/tucows/  
**Base URL:** https://rr-n1-tor.opensrs.net:55443  
**Documentation:** https://domains.opensrs.guide

OpenSRS Domains and TLS/SSL API is one of 2 APIs that [Tucows](https://apis.io/providers/tucows/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Domains, DNS, SSL, and Registrar. The published artifact set on APIs.io includes API documentation and a getting-started guide.

Wholesale reseller API for domain-name lookup, registration, transfer, renewal, DNS-zone management and TLS/SSL certificate ordering. An XML-over-HTTPS POST protocol authenticated with a reseller username and a double-MD5 request signature.

## Machine-readable artifacts (4)

- **Documentation** — https://domains.opensrs.guide
- **GettingStarted** — https://domains.opensrs.guide/docs/quickstart
- **LLMsTxt** — https://raw.githubusercontent.com/api-evangelist/tucows/refs/heads/main/llms/tucows-llms.txt
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/tucows/refs/heads/main/apis.yml

## Other Tucows APIs (1)

- [OpenSRS Email API (OMA)](https://apis.io/apis/tucows/opensrs-email-api-oma/)

## Tags

Domains, DNS, SSL, Registrar

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