Osir
Osir is a domain registrar based in the United States. It is ICANN-accredited, with IANA ID 4332. It has an API that account holders can use.
| Website | osir.com |
|---|
API access
| Status | Has an API |
|---|---|
| API | Has an API |
| Documentation | osir.com |
| Notes | REST API at api.osir.com/v1 with API keys or OAuth 2.0, plus MCP and A2A access for AI agents. |
About Osir
| Headquarters | United States |
|---|---|
| Type | Retail registrar |
| ICANN accreditation | IANA ID 4332 |
| Site languages | German, English |
| RDAP server | https://rdap.osir.com/rdap/ |
Osir in Lemon Domains
Bring Osir domains into Lemon Domains by pasting the domain list or uploading a CSV export, next to the domains from every other registrar you use. Lemon Domains tracks expiry dates and lets your AI assistant answer questions about them through MCP.
Other registrars in United States
| Integrated | |
| Integrated | |
| Integrated | |
| Integrated | |
| Blocked | |
| Blocked |
Sources: the ICANN list of accredited registrars and the IANA registrar ID registry (refreshed 2026-10-24), and Osir's own site and documentation (reviewed 2026-10-24). This page is also available as Markdown and JSON. Something out of date? Tell us.
Frequently asked questions
Is Osir ICANN-accredited?
Yes. Osir is on the ICANN list of accredited registrars, so it can register generic extensions such as .com directly with the registries.
What is Osir's IANA ID?
4332. The IANA registrar ID appears in the registrar field of a domain's public record, so it shows which registrar a domain is with.
Does Osir have an API?
Yes. Osir offers an API to account holders. REST API at api.osir.com/v1 with API keys or OAuth 2.0, plus MCP and A2A access for AI agents. Osir domains come into Lemon Domains by paste or CSV import.