OpenSRS

OpenSRS — Tucows' wholesale platform — deep API, real OT&E, signed contract required. OpenSRS is the archetypal wholesale platform: XML over HTTPS with reusable contact handles, per-tier pricing for every TLD, a pollable event queue, and an OT&E that exercises transfers and renewals properly. Coverage of awkward ccTLDs, .au included, is among the best available. Getting in means an application, an approved reseller agreement and a funded balance, and the opening deposit is quoted rather than published. Built by Tucows. Founded 1999. Public (NASDAQ: TCX).

We track it in 1 comparison — Domain APIs — so every claim below is a cell in a table you can open and check rather than an impression. Across those rosters it sits against 14 other tools, and what follows is where it visibly separates from them.

Where it wins.

• Reseller contract — Yes, which only 3 of 15 tools here manage.
• .au support — Yes, which only 4 of 12 tools here manage.
• .com renewal — $11.5 /yr, 5th of 15.
• Suggestion API — Yes, which only 4 of 14 tools here manage.
• Webhooks / events — Partial, which only 5 of 15 tools here manage.

Each of those is ranked against the whole roster on its category page, not against a hand-picked subset, so a first place here means first of everything we list.

Where it gives ground.

• API since — 1999, 14th of 15. Porkbun records 2019.
• API auth — api-key-ip-allowlist, 11th of 15. Gandi records bearer-token.
• Privacy via API — paid-addon, 9th of 15. Porkbun records free-and-default.

None of these disqualify it on their own. They are the fields to check against your own requirements before you commit, because they are the ones where a competitor genuinely does better.

Provenance. 24 of 26 tracked fields carry a value for OpenSRS, and 5 of those cite a document you can open. Last verified 2026-07-23. Every figure keeps its own provenance — measured by us, claimed by the vendor, inferred, or community-reported — and we would rather print a dash than a guess.

Its nearest neighbour in our data is Direct EPP (own accreditation). OpenSRS is ahead on Renewal price in API (Yes against No) and Reseller contract (Yes against No). Direct EPP (own accreditation) takes Pricing basis (wholesale against wholesale-tiered) and API since (2004 against 1999). That pattern repeats across the rest of the roster — see OpenSRS alternatives for the other rivals, each compared the same way.

Company

Tucows

Founded

1999

Funding

Public (NASDAQ: TCX)

Fields we track

24 of 26

Last verified

2026-07-23

If domains are your product rather than a feature, this is the serious choice: proper contact handles, tiered wholesale pricing readable from the API, a real OT&E, and among the best ccTLD and .au coverage. The XML surface is dated and the opening deposit is deliberately opaque.

Reseller contract

●Yes1st of 15

Vendor-claimedverified 2026-07-23source

.au support

●Yes1st of 12

Inferred

.com renewal

$11.5 /yr5th of 15

Inferred

Suggestion API

●Yes1st of 14

Inferred

Spend to first call

$500 up front13th of 14

Community-reported

API since

199914th of 15

Inferred

Register endpoint

●Yes1st of 14

Inferred

API auth

api-key-ip-allowlist11th of 15

Vendor-claimedverified 2026-07-23source

OpenSRS is the right call in these situations, each one drawn from a field we actually record:

• Hosting platforms reselling domains at volume.
• Products needing .com.au alongside broad international coverage.
• Teams that must test transfers and renewals before launch.
• Reseller contract is your binding constraint. OpenSRS records Yes, which only 3 of the 15 tools in the Domain APIs roster do. We define that field as must a reseller or partner agreement be applied for and countersigned before production API access is granted? Partial means an application form and manual approval but no negotiated contract.
• .au support is your binding constraint. OpenSRS records Yes, which only 4 of the 12 tools in the Domain APIs roster do.
• .com renewal is your binding constraint. OpenSRS records $11.5 /yr, 5th of 15 in the Domain APIs roster.
• Suggestion API is your binding constraint. OpenSRS records Yes, which only 4 of the 14 tools in the Domain APIs roster do.

Reach for something else when any of the following is a requirement rather than a nice-to-have:

• API since. OpenSRS records 1999, 14th of 15 in the Domain APIs roster. Porkbun records 2019 on the same field. If that is a hard requirement rather than a preference, start elsewhere.
• API auth. OpenSRS records api-key-ip-allowlist, 11th of 15 in the Domain APIs roster. Gandi records bearer-token on the same field. If that is a hard requirement rather than a preference, start elsewhere.
• Privacy via API. OpenSRS records paid-addon, 9th of 15 in the Domain APIs roster. Porkbun records free-and-default on the same field. If that is a hard requirement rather than a preference, start elsewhere.

We publish this block because a comparison that only lists what a tool is good at is marketing. Every figure above sits on the same page as its source, and the field definitions are on the category tables if you want to check how we measured them.

What we don't know. 2 of the 26 fields we track for OpenSRS are still blank: Min prepaid balance and Rate limit. Those render as dashes rather than as zeroes or assumptions, because an empty cell and a bad cell are not the same thing and only one of them is honest. If you know any of these figures and can point at a document, tell us.