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High-Low Card

A real higher/lower card game with genuine remaining-deck odds

Unify Dynamics LLC

Documentation
Tools7read-only
Sign-inNoneno account, no key
Data keptNoneprocessed in memory
PriceFreeoptional Pro limits
StatusLiveMCP + REST
Works withMCP · RESTany agent

Try asking

Real questions, and the tools your agent calls to answer them.

Let's play higher or lower
Tools called
new_game
What are my odds right now?
Tools called
get_probabilities
I'll guess higher
Tools called
guess
What should I pick?
Tools called
ai_move
Show me my streak
Tools called
render

About

High-Low Card is a real, stateless, playable higher/lower card-guessing game. new_game shuffles one or more decks and reveals the first card. get_probabilities returns the exact higher/lower/equal odds computed from the true remaining deck. guess reveals the next card, resolves the round (correct/incorrect/push per the configured tie rule), and tracks score and best streak. ai_move recommends whichever side is genuinely more likely to win right now, or says plainly when it's an exact coin flip. render gives a human-readable summary of the card, score, streak, and live odds. There is no server-side session; every tool call takes the full game state and returns the new one. Keyless; fully local; zero upstream calls; nothing stored.

Sources: Original, hand-authored content. Fully local, zero upstream calls.

Privacy

The publisher, Unify Dynamics LLC, states that tool inputs are processed in memory and not retained.

Data not collectedNo account, no profile, no stored prompts or results.
Privacy policyTerms

What it can do

7 tools, grouped by job. Every one is read-only or compute-only.

OpenAPI
Play4 tools
  • New gameShuffles a fresh deck and reveals the first card.
  • Get valid movesReturns ["higher", "lower"] while the game is in progress, else an empty list.
  • GuessReveals the next card and resolves the round.
  • RenderA human-readable summary: current card, deck size, score and best streak, the live odds, and the last round played.
Odds2 tools
  • Get probabilitiesThe EXACT current odds that the next card is higher, lower, or equal to the current card -- computed from the real remaining deck (cards already…
  • Ai moveRecommends the mathematically better guess (higher or lower) given the true remaining-deck odds right now, or 'either' on a genuine exact tie --…
Rules1 tools
  • RulesPlain-language rules: how a round resolves, the tie rule, and how probability and the AI's recommendation are computed.

Information

PublisherUnify Dynamics LLC
CategoryGames & entertainment
LanguagesEnglish
Built forGlobal
CompatibilityAny MCP client · any agent · REST
Version0.1.0
MCP endpointhttps://highlowcard.connectorbay.com/mcp
REST APIopenapi.json
SupportGet help · Status
CountryWorldwide

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Documentation

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What High-Low Card is for

A real, playable higher/lower card-guessing game your assistant can run right inside the conversation — not a rules explainer. Guess whether the next card beats the current one, and see genuine odds computed from the actual remaining deck, not a theoretical guess.

What it does

new_game shuffles one or more 52-card decks together and reveals the first card. Before guessing, get_probabilities (or render) shows the exact count and percentage of remaining cards that are higher, lower, or equal to the current card, computed straight from the real cards still in the deck — as high cards get used up, the true odds shift, and this always reflects that honestly. guess reveals the next card and resolves the round: correct guesses build a streak, a wrong guess resets it to zero, and a tie is either a "push" (no change) or a loss depending on the tie_rule you started the game with. ai_move recommends whichever side is genuinely more likely to win right now, or says plainly that it's a coin flip when the odds are exactly even.

Why the probability is real, not decorative

Most higher/lower implementations either skip the odds entirely or estimate them from a full, theoretical 52-card deck. This one tracks the literal remaining deck inside the game state and counts it exactly every time — so late in a long-running game, after many high cards have already appeared, the reported probability of drawing another high card is measurably (and correctly) lower than a naive full-deck guess would suggest.

How state works

There is no server-side session. Every tool takes the full game state (the remaining deck, current card, score, streak, tie rule) and returns the new one — your assistant carries that object forward between calls.

What it is not

Not a real-money gambling service — a correct probability-tracking guessing game, fully local and stateless, for entertainment and for genuinely learning how the odds shift as a deck depletes.

Privacy policy

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High-Low Card — Privacy Policy

Effective 27 September 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.

What High-Low Card is. High-Low Card is a connector (an MCP server and REST API) that AI assistants and personal agents call on your behalf to run a real higher/lower card-guessing game — dealing, probability calculation, and round resolution. You interact with your assistant; the assistant sends us only the arguments needed for one tool call at a time.

What we receive. The arguments of each tool call — a game state (the remaining deck, current card, score, streak), and a chosen guess direction — plus the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant, and a Pro API key if you have one) and standard server logs.

Everything is computed locally and nothing is stored. There is no upstream call at all, no database, and no per-user session — every tool call is a pure function of the state it's given. Game states are not logged, recorded, or used to train anything, and nothing carries over between requests. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting-provider access logs, which contain IP addresses and request paths but not request bodies, are retained for up to 30 days for security and abuse prevention.

Sub-processors. None — everything runs locally on our server. Hosting: Vercel (United States regions).

Legal bases and your rights. Our processing is necessary to provide the service you request through your assistant. Because we store no personal data beyond short-lived logs, requests to access, correct or delete personal data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. We do not sell or share personal information.

Children. High-Low Card is a general-audience service operated by the person using the assistant.

Changes. We will post changes here with a new effective date.

Terms of service

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High-Low Card — Terms of Service

Effective 27 September 2026. These terms govern use of the High-Low Card connector ("the Service") operated by Unify Dynamics LLC ("we", "us").

  1. The Service. High-Low Card runs a real, stateless higher/lower card-guessing game — dealing, exact remaining-deck probability calculation, and round resolution — accessed through an AI assistant or directly over MCP or HTTP.
  2. Just a game. The Service is entertainment only. Nothing about its output, including its probability figures, should be treated as gambling, financial, or any other advice.
  3. Reference content. The engine's rules and probability math are fixed and documented; behavior does not depend on real-time external data.
  4. Acceptable use. Automated use within the published rate limits is welcome.
  5. Availability. The Service is provided "as is" without warranty. We may change, limit or discontinue it at any time.
  6. Data. Our Privacy Policy describes what we process. In short: your guess is answered from the state you sent us, and nothing is stored.
  7. Pro keys. Optional Pro API keys are issued at our discretion, are personal to the holder and may be revoked for abuse.
  8. Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss or damage arising from use of the Service. Our total liability is limited to US $100.
  9. Governing law. California law; venue in San Mateo County, California.
  10. Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/highlowcard

Support

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High-Low Card support

Email agent@connectorbay.com. We answer within two business days.

When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. High-Low Card never asks for them.

Get High-Low Card

Free · No sign-in · Read-only

Streamable HTTP, stateless, no authentication. Paste the endpoint into any MCP-capable agent.

https://highlowcard.connectorbay.com/mcp
{
  "mcpServers": {
    "highlowcard": {
      "type": "http",
      "url": "https://highlowcard.connectorbay.com/mcp"
    }
  }
}