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Playson · slots API
Playson API: Hold and Win slots like Buffalo Power, delivered through one API
Playson turned the hold-and-respin bonus into a franchise: Buffalo Power, Royal Coins, Wolf Power and many more Hold and Win titles. SoftAggregator adds them to your casino through a single JSON API and a seamless wallet, together with 40,000+ games from 200+ providers.
Playson at a glance
The short version, for operators comparing studios
| Fact | Detail |
|---|---|
| Founded | 2012, as a Malta-based start-up |
| Signature format | Hold and Win series with coin respins and fixed jackpot levels |
| Breakout titles | Solar Queen; Buffalo Power: Hold and Win (2020) |
| Typical session | Medium to high volatility, a bonus that is easy to follow on a phone |
| How to get it | Through SoftAggregator: one API, one wallet, the rest of the catalogue included |
From Malta start-up to Hold and Win specialist
Playson started in 2012 as a small Malta-based studio and grew on the back of a few early hits, Solar Queen among them. Its real identity came later, when it built a long series of games around one bonus format that players could recognise instantly.
That format is Hold and Win: land enough coin symbols and they lock in place while the player gets a few respins, each new coin resetting the count, with fixed jackpots on top. Buffalo Power: Hold and Win, released in 2020, became the reference title of the series and opened the way for dozens of variations.
Why players stick with Playson games
They stick because the bonus is readable at a glance. A player on a small screen understands immediately that more coins mean more money, and every respin is a small moment of suspense.
- Buffalo Power: Hold and Win: the flagship; a wide reel set, coin collection and several jackpot tiers.
- Royal Coins and Wolf Power: the same idea with different themes and pacing, which lets a lobby offer a whole Hold and Win shelf.
- Solar Queen: the Egyptian-themed slot with free spins that helped the studio grow in its early years.
- Book of Gold: Classic: a straightforward expanding-symbol game for players who like the book format.
Session length tends to follow the bonus: players stay until the next trigger, which makes Playson titles solid performers on mobile, where short bursts of play are the norm.
How Playson plugs into your wallet
Your server keeps the money; our platform tells it what happened. For each Playson round, your callback URL receives GET requests with action=balance, action=debit or action=credit, and replies with the updated balance.
Amounts are integers in the currency's minor unit, so a 2.00 stake is 200. Each request carries a call_id, which is the unique transaction key you must deduplicate on, a round_id to group movements, and a game_id equal to the id_hash of the title.
The Hold and Win case
When the coin bonus triggers, the respins are free for the player. Your wallet therefore receives the bonus result as a credit that has no debit of its own. This is expected: store it, return the new balance, and never use the type field (bet, win, bonus_fs) as a reason to refuse. Jackpot tiers won in the bonus follow the same path.
Safety rules in one place
Always return HTTP 200 with an error field: 0 for success, 1 if the balance is too low (and include that balance), 2 for a signature mismatch, an unknown user or an internal failure. Verify key = md5(timestamp + salt_key) and reject timestamps older than 30 seconds. A call flagged rb=1 is a rollback and reverses its movement exactly once. The complete spec with examples lives in the developer documentation.
Launching a Playson game, request by request
- POST method=getProviderList to https://api.softaggregator.com/api/v1 with api_login and api_password, and note the Playson provider key.
- POST method=getGameList; filter on that key. Each entry has an id_hash, name, game_type, image and play_for_fun_supported.
- POST method=createPlayer for a new customer, with the currency they will keep for good.
- POST method=getGame with gameid (id_hash), lang, currency, device, country and homeurl; show the returned URL in an iframe.
- For visitors, POST method=getGameDemo to open fun mode where supported.
That is the whole flow. It is identical for every studio in the catalogue, which is why operators usually connect once and switch studios on as a business decision.
Currencies for Playson's audiences
Playson content fits European, Latin American, African and Asian lobbies alike, and each player bets in the currency you set at createPlayer. For these audiences, native options include EUR, GBP, PLN, HUF, RON, BRL, MXN, ARS, CAD, ZAR, INR, BDT, THB, MYR, PHP, VND, JPY and KRW.
If your market uses a different currency, your account can be run in USD or EUR, with the conversion handled by your platform before amounts reach the player; get in touch and we will look at your case.
What you gain over a single-studio deal
You gain every other studio for the same work. A direct Playson deal covers Playson; a SoftAggregator account covers Playson plus slots, crash, live and sports content on one balance, which is the point of a game aggregator API.
Playson through SoftAggregator vs going direct
| Need | SoftAggregator | Single-studio deal |
|---|---|---|
| Adding Playson | Switch on in the catalogue | Full integration project |
| Adding the next studio | Same API, nothing new to build | Another project |
| Wallet | Seamless, balances on your side | Studio's own specification |
| Multiple brands | Separate keys and callback per website, shared credit and reports | Handled case by case |
| Reporting | Bets, wins, RTP% and GGR, live, in one backend | One report per studio |
| Support | 24/7 on Telegram @mentionso and [email protected] | Studio business hours |
Credit is prepaid and visible at any moment in your operator backend, with alerts before it runs low. Our catalogue is updated continuously; getProviderList and getGameList always show the live state. For the architecture behind it, see the casino game aggregator API page.
Playson API questions
What is the easiest way to integrate Playson slots?
Use an aggregator that already carries them. With SoftAggregator, Playson games appear in getGameList once your account is approved; you launch them through getGame and settle bets on your own wallet through three callback actions.
Is Buffalo Power: Hold and Win available through SoftAggregator?
Playson's Hold and Win titles, Buffalo Power among them, are part of the catalogue we deliver. Look them up by name in getGameList to get the id_hash you pass to getGame.
How are Hold and Win bonus wins paid to the player's balance?
As credit callbacks. The respins of the bonus cost the player nothing, so the credits can arrive without a matching debit; accept them and deduplicate on call_id.
Can I launch Playson games in Brazilian real or Mexican peso?
Yes, BRL and MXN are native. Pick the currency when you create the player; it stays fixed for that player afterwards.
Do I need to change my integration when Playson releases a new game?
No. New titles simply appear in getGameList with their own id_hash, and they settle through the same callbacks you already run.
Sources and last update
Playson's founding year and the release year of Buffalo Power: Hold and Win come from the studio's interviews and published game coverage.
- Playson website and game pages, September 2026
- Gaming Intelligence interview with Playson on the studio's history, consulted September 2026
- SoftAggregator docs.html, September 2026
Last reviewed: 24 September 2026.
Stack your lobby with Hold and Win
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