By Francisco García Domene, CEO of Prisma Reviews · Updated Nov 2026

Desktop software reviews API: Microsoft Store, Mozilla Add-ons, Open VSX, JetBrains Marketplace, WordPress.org and Steam

Prisma is a desktop software reviews API: one REST API that reads the reviews of the desktop apps, browser extensions and developer tools you own or manage, from every platform that matters to them, in one JSON shape, with a signed webhook on every new review. Built for independent developers, developer-tool vendors, extension publishers and game studios that ship outside the mobile stores.

Get a free API key

2 locations free. Test keys return sample reviews from every platform. No card, no sales call.

Why desktop apps, browser extensions and developer tools need an API, not six integrations

• Every store has its own shape: Microsoft Store needs a Partner Center app with Entra ID, Mozilla Add-ons is a public endpoint with JWT replies, Open VSX returns every review at once, JetBrains serves HTML comments.
• Only Mozilla Add-ons lets the developer reply by API; Microsoft documents its review response API as not working right now, and the rest have no write endpoint.
• Open VSX reviews have no ids and JetBrains dates are epoch milliseconds in a string, so deduplication is on you.
• A crash report in a 1-star review on the Microsoft Store and the same bug on a JetBrains plugin review never meet in one tracker.

Prisma measured all of this when it integrated the platforms; the per-platform rules are in the State of Review Platform APIs 2026.

The platforms, and what each one allows

Replies go out by API on Mozilla Add-ons. Everywhere else the review comes with its URL and you answer on the platform.

What teams build with it

1. One feed of every review of your apps and extensions across stores, into the issue tracker, with store and version attached.
2. A webhook that opens a ticket for each 1- or 2-star review that mentions a crash, routed by product.
3. Replies on Mozilla Add-ons published by API from your support desk, drafted by your team and approved by a person.

One call, every platform

curl "https://api.prismareviews.com/v1/reviews?platform=microsoft_store&has_reply=false&since=2026-10-01" \
  -H "Authorization: Bearer $PRISMA_API_KEY"

Every review comes back with the same fields whatever the platform: id, platform, location_id, rating (always out of 5), title, text, author, language, created_at, reply and url. This call lists the Microsoft Store reviews since 1 October that nobody has answered yet; drop the platform filter and you get every platform in one list, newest first. Register a webhook with POST /v1/webhooks to receive review.created the moment a new one is synced; the webhooks reference has the payload and the signature check.

Honest limits

• Prisma reads reviews of businesses you own or manage. It is not a scraper for competitors’ reviews.
• On platforms without a reply API, Prisma can’t post for you; it returns the link and the existing reply.
• Public-page platforms are read on a schedule (every 6 to 24 hours depending on the plan), not in real time; see how often Prisma checks.
• Prisma never writes replies. Your team or your own AI writes them; Prisma publishes the exact text you approve.

FAQ

Which desktop and extension stores allow replies by API?

Mozilla Add-ons, with an AMO API key of a developer of the add-on. Microsoft Store’s review response API is documented as not working right now, and Open VSX, JetBrains Marketplace, Thunderbird, WordPress.org and Steam have no reply endpoint; Prisma returns each review with its URL.

Do I need credentials to read extension reviews?

No for Mozilla Add-ons, Thunderbird, Open VSX, JetBrains Marketplace, WordPress.org and Steam: Prisma reads them from the public page or endpoint. The Microsoft Store needs a Partner Center app registration.

Does Prisma write the replies?

No. Prisma never writes a reply. Your team or your own AI drafts it, a person approves it, and Prisma publishes exactly that text where the platform allows it.