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Connect ChatGPT to Kalshi and Polymarket

Quick Answer

to give ChatGPT live Kalshi and Polymarket prices, turn on developer mode under Settings → Apps & Connectors → Advanced, create a connector with https://predictionmarketspicks.com/api/mcp/connect and sign in with a free PredictionMarketsPicks account: about 30 seconds, no API key, and the full board once a day. Prefer no account? https://predictionmarketspicks.com/api/mcp/mcp?via=site-chatgpt with no authentication works too, and 38 of the 45 tools answer on it right away.

Connector URL — free account, full board once a day
https://predictionmarketspicks.com/api/mcp/connect
No account? Use this URL with “No authentication”
https://predictionmarketspicks.com/api/mcp/mcp?via=site-chatgpt

No sign-in at all: 38 of the 45 tools answer, with a lighter daily allowance.

Right now

As of 10:08 PM ET · refreshes hourly

Set it up in ChatGPT

  1. In ChatGPT open Settings → Apps & Connectors → Advanced settings and turn on developer mode.
  2. Back in Apps & Connectors choose Create, name it PredictionMarketsPicks, paste https://predictionmarketspicks.com/api/mcp/connect as the MCP server URL and choose OAuth.
  3. ChatGPT opens a PredictionMarketsPicks window: enter your email and the one-time code, allow access, and you are signed in. Members get Pro depth on the same connector.
  4. In a new chat open the + menu, pick developer mode and enable PredictionMarketsPicks, then ask about a market.

Developer mode is a ChatGPT setting for paid plans; OpenAI names the plans and the exact menu labels, and both change. If your menus read differently, the URL and the OAuth sign-in are the parts that matter.

Sixty seconds: the connector added once, then live NFL prop prices, a strike ladder and a position size inside the chat. Watch on YouTube

Six prompts to try in ChatGPT

Copy one into a new chat and swap in your own team, player or market.

Which NFL props this week are cheapest on Kalshi compared with the other venues?

What you get back: Each prop with its price on every venue that lists it and the best place to buy it.

Where is Kalshi cheaper than DraftKings and FanDuel on tonight’s NBA games?

What you get back: Kalshi moneyline, spread and total beside DraftKings, FanDuel, BetRivers, Fanatics, ESPN, Novig and ProphetX at the same line — the cheapest venue per side, Kalshi fee included. Market prices only, no model.

Which NHL games tonight does the model see differently from Kalshi?

What you get back: Tonight’s board as Market · Model · Fair per contract, starting goalies checked first; the model publishes at 10:45 AM ET.

What are Kalshi’s high-temperature strikes for New York today, against the NWS forecast?

What you get back: Every open strike with its YES price, the settlement station, the strict-comparison rule and the NWS forecast high beside it.

What are the odds the Fed cuts at the next meeting, Kalshi versus Polymarket?

What you get back: The next FOMC meeting’s outcomes on both venues and CME futures, with the gap in percentage points.

Which 2026 Senate races are closest according to Kalshi?

What you get back: Every 2026 Senate seat with its live Kalshi price and rating, closest race first.

ChatGPT and prediction markets — frequently asked

Does ChatGPT know live Kalshi prices without a connector?

No. ChatGPT’s model has no live order-book feed, and a web search returns a page that may be hours old. The connector lets ChatGPT call our tools, which read the current Kalshi and Polymarket prices at the moment you ask.

Is the ChatGPT connector free?

Yes. The sign-in connector needs only a free account, and the no-account URL needs nothing at all: 38 of the 45 tools answer either way. A Pro membership adds the model’s edge calls; everything else, including the NFL prop board and the Fed odds, is free.

Can ChatGPT place a trade on Kalshi through this connector?

No. Every tool is read-only: prices, probabilities and calculations. Trades happen on the exchange itself, with your own account.

Why does ChatGPT sometimes answer without calling the connector?

ChatGPT decides when a tool is useful. Naming the market or the venue in your question (“on Kalshi”, “Polymarket price”) makes the call far more likely, and asking for a live number almost always triggers it.

Using Claude, Gemini, Cursor or Grok? setup for every host → · what every tool returns →