Brigid mark

The bridge bidding engine,
as an API.

Brigid bids in six systems and explains every call in plain language — so your platform or app can offer real bidding without building an engine.

Request API access See how it works
6 bidding systems  ·  Explainable bids  ·  Multilingual notes  ·  Built on a proven engine

Why Brigid

Bidding is the hardest thing to build in bridge.

A correct, multi-system bidding engine takes years of expert work. Most products ship without one, or get stuck with a single system and no explanations. Brigid gives you bidding that's correct, multi-system, and actually teaches — through one API.

♠♥♦♣

Multi-system bidding

One engine, six systems. Ask for a bid in SAYC, 2/1, Acol or GF21 and get the system-correct call.

💬

Explainable bids

Every bid comes with a human-readable note — what it shows, and why — not just a code. Turn bidding into teaching.

🌐

Multilingual

Bid notes in English and Chinese (Simplified & Traditional) out of the box, with more on the way.

🔁

Full auction simulation

Get the next bid, or simulate a complete auction seat by seat — ideal for bots, practice and review.

🎯

Calibrated & verifiable

Backed by a curated knowledge base and accuracy tooling — not a guessing chatbot.

⚡

Fast & simple

A clean REST API. Send a hand and the auction so far; get a bid and its note back. That's it.

Coverage

Six bidding systems

Built and curated per system — so a SAYC answer is a SAYC answer, not an average of everything.

SAYC GIB 2/1 Acol GF21 Precision · beta Polish Club (WJ) · beta

How it works

One request. A bid and its explanation.

Send the hand and the auction so far. Brigid returns the recommended bid — and a note explaining it.

# Ask Brigid for the next bid
POST /recommend-bid
{
  "bid_system": "sayc",
  "cards":      "AKQ52.K84.A73.Q5",
  "bids":       ["1H", "p"]
}

# Response
{
  "bid":  "1S",
  "note": "5+ spades, 12+ points. A new suit at the one
           level is forcing — partner must bid again."
}

The engine, in a real product

Don't take our word for it — go bid.

Brigid is our own bridge app, powered by this exact engine. Download it, play a few boards, and you'll see the multi-system bidding and plain-language explanations you'd be embedding — live, in someone's hands.

Download on theApp Store Coming soon toGoogle Play

iOS available now · Android in review

The difference

More than a bot.

Most engines give you one system and a bare bid. Brigid gives you coverage and an explanation in your players' language.

 
Typical engine
Brigid
Bidding systems
One
Six
Explains each bid
✕
✓
Multilingual notes
English only
EN · 中文
Full auction simulation
Limited
✓
Build time for you
Years
An afternoon

Who it's for

Built to embed

Bridge platforms

Give your robot games and practice tools real, multi-system bidding and post-game explanations — at any scale, with flat licensing.

Bridge apps

Ship bidding and teaching features you could never build alone. A simple API and generous free tier to start.

Bring real bidding to your bridge product.

Tell us about your platform or app and we'll set you up with API access and docs.

Request API access