FastGamesAPI · Operator brief 01 / 12

B2B iGaming supplier · Live in production

The house
always settles.

One API for 68 provably-fair games. You keep the wallet. We own the math, the RNG and the audit trail — and settle in under 3ms.

HMAC-SHA256 provably fair RTP-validated engines 16+ currencies REST + gRPC edge

→↓ or scroll ›

FastGamesAPI 02 / 12

The operator's problem

Adding game content is slow, custody-risky, and opaque.

Every new supplier is another integration, another wallet handing your player balances to a third party, and a black-box RNG you can neither audit nor tune.

01 · SPEED

Integrations take months

Each provider ships its own SDK, its own wallet contract, its own quirks. Time-to-content is measured in quarters, not days.

weeks of glue code per supplier

02 · CUSTODY

Someone else holds the money

Most suppliers custody balances or run a shadow wallet. That is reconciliation risk, float risk, and a licensing headache you inherit.

third-party float on your book

03 · MATH

The RNG is a black box

Fixed RTP you cannot move, results you cannot verify, disputes you cannot resolve. Players ask "was that fair?" and you have no answer.

no verification, no RTP control

FastGamesAPI 03 / 12

What FastGamesAPI is

One API. Sixty-eight games. You keep the wallet.

68 provably-fair games across five categories plus a PvP/duel suite — served over one /api/v1/bet endpoint.
Zero custody. Every balance stays on your platform. We call your wallet; we never hold player money.
Math you can audit. A pure-Go, RTP-validated engine returns a cryptographic proof with every round.
Live in production with real operators today — REST for bets, gRPC + mTLS at the edge.

You ownPlayer · wallet · every balance

↓ /api/v1/bet

We ownRNG · game math · RTP · audit trail

↓ atomic settle

Back to youSigned result · payout · verifiable seed

FastGamesAPI 04 / 12

The portfolio

Every game your players already want.

8 Originals 8 Crash & Mine 10 Table & Cards 30+ Slots 7 Skill & Arcade 6 PvP / Duel

Dice

Plinko

Crash

Mines

Limbo

Tower

Keno

BitKong

Blackjack

Baccarat

Roulette

V. Poker

Barbut

Sic Bo

Egypt

Fruit

Pirate

Cyber

Space

Candy

Gold Rush

M.sweeper

Treasure

Pump

Penalty

Duckhunt

Horses

Scratch

Wheel

RPS Duel

30 titles shown · full catalogue is 68 — with ~30 slot themes sharing one RTP-validated reel engine.

FastGamesAPI 05 / 12

Provably fair

The house edge, in writing.

1

Commit

Before any bet the player sees sha256(server_seed). The outcome is locked before play begins.

2

Play

Results come from HMAC-SHA256(server_seed, client_seed:nonce) — deterministic, replayable, impossible to influence from the browser.

3

Reveal & verify

Seed rotation reveals the server seed. Anyone recomputes any historical round at /api/v1/seed/verify — no account needed.

— Sample paytable lines · exact integer math —

Dice · under 50.001.98× (9900 / 5000)

Barbut · şeş-beş17.82× (3564 / 200)

Baccarat · banker1.95× (39 / 20)

War · first-deal1.96× (RTP 98.12%)

Every multiplier is a fraction · every outcome a hash your players can verify

FastGamesAPI 06 / 12

Speed & custody

Sub-3ms atomic settle. Zero custody.

<3ms

Full round-trip settle

~0.5ms

gRPC wallet op

150K

Req / sec / node

99.9%

Uptime

Capability 01

GetTransaction

Read-side reconciliation. Query any transaction against your wallet to keep both ledgers provably in step.

gRPC + mTLS

Capability 02

Atomic SettleBet

Debit and credit in a single call — ATOMIC_SETTLE_V1. Halves wallet round-trips on most games; the balance is only ever yours.

debit + credit · one call

FastGamesAPI 07 / 12

Dynamic RTP

Set the return per launch — 85 to 99%.

85% to 99%

Set per game at game-init, snapshotted into every round.

Different players can run different RTP on the same integration.

Fully deterministic — and the return never exceeds 100%.

85% floor92%99% ceiling

Snapshot is written into the round record — the RTP that played is the RTP that is audited.

Tune promo cohorts, jurisdictions or VIP tiers without a re-integration.

FastGamesAPI 08 / 12

Integration

Live in three steps.

1

Launch the sandbox

Instant access with play money. No contract, no card to start building.

2

Connect your wallet

Implement GetTransaction + SettleBet over gRPC. Run the conformance suite to all-pass.

3

Two-gate go-live

Fill production wallet + webhook, then pass game ID + stake to /api/v1/bet. Done.

place-bet.js
// 1 · your backend calls FastGamesAPI
const res = await fetch("https://api.fastgamesapi.com/v1/bet", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "X-User-Id":     "user_12345",
  },
  body: JSON.stringify({
    game_id:  "dice",
    currency: "USD",
    stake:    10.00,
    target:   49.5,
    side:     "under",
  }),
});

// 2 · RGS validates, calls your gRPC wallet,
//     settles atomically, returns the round
const round = await res.json();
console.log(round.payout);      // 19.80
console.log(round.server_seed); // verifiable

FastGamesAPI 09 / 12

Analytics & GGR

Every round streamed, every margin visible.

GGR · by game · todayLive

GameRoundsGGR (USD)

Crash

184,20342,118

Dice

301,55933,940

Egypt Slots

96,74228,455

Mines

72,11821,067

Roulette

40,90514,880

Per-round GGR broken out by game, currency, site & environment.
Round forensics — replay any bet with its seed, stake, RTP snapshot and payout.
Real-time network health — every round streamed to ClickHouse analytics.
The GGR you settle is the GGR you're billed on — no reconciliation dispute.

FastGamesAPI 10 / 12

Commercials

One catalogue. Your choice of model.

Admin-set per operator — pick the commercial that fits your book, switch as you scale.

Model A

Flat platform fee

A predictable fee for a granted game set. Best when you want fixed cost and full margin upside.

Admin-granted game categories
Unlimited rounds, all currencies
No revenue share on winnings

Model B

GGR revenue share

We share your gross gaming revenue — low fixed cost, aligned incentives, scales with your growth.

Transparent per-round GGR reporting
Analytics by game, currency & site
Start small, no heavy commitment

FastGamesAPI 11 / 12

Why now

Not a roadmap — running in production.

68

Games shipped

The full catalogue is built, RTP-validated and callable today — not a promised backlog.

5 engines

RTP-validated math

Every engine passes a Monte-Carlo validation harness; the reel engine alone drives ~30 slot themes.

99.9%

Live with real operators

Serving real rounds in production. Try any title yourself via a guest session — real math, real seeds.

FastGamesAPI 12 / 12

Get started

Get your API key.

All 68 games in the sandbox with a sub-3ms settle. Free to build — production is a two-gate go-live away.

Get your API key Read the docs

fastgamesapi.com/portal/signup

B2B supplier only · for licensed operators · the house always settles

The housealways settles.

Adding game content is slow, custody-risky, and opaque.

Integrations take months

Someone else holds the money

The RNG is a black box

One API. Sixty-eight games. You keep the wallet.

Every game your players already want.

The house edge, in writing.

Commit

Play

Reveal & verify

Sub-3ms atomic settle. Zero custody.

GetTransaction

Atomic SettleBet

Set the return per launch — 85 to 99%.

Live in three steps.

Launch the sandbox

Connect your wallet

Two-gate go-live

Every round streamed, every margin visible.

One catalogue. Your choice of model.

Flat platform fee

GGR revenue share

Not a roadmap — running in production.

Games shipped

RTP-validated math

Live with real operators

Get your API key.

The house
always settles.