ChatGPT reaches QuantGPT through developer mode, which OpenAI offers on its Plus, Pro, Business, Enterprise and Education plans, in the browser. You add QuantGPT as an app and sign in to QuantGPT once; there is no key to paste. After that, ChatGPT can search the strategy library and run backtests mid-conversation. On ChatGPT Free or Go, use the setup prompt instead.
Updated September 2026 · ChatGPT facts from its maker's own docs, linked under Sources
Once connected, ChatGPT can search QuantGPT's strategy library, run backtests on decades of US market history, grade a stock and query the research warehouse, in the middle of a conversation. The work runs on QuantGPT's side, and ChatGPT gets the numbers back, losing years included. The connection uses MCP (Model Context Protocol), the open standard AI apps use to reach outside tools.
QuantGPT. Description, for example: Backtests and research on market history.https://terminal.quantgpt.co/mcp, with the /mcp path, and create the connection.Ask: Use the QuantGPT app's describe_capabilities tool and tell me what data it
covers. A connected app answers with QuantGPT's own map: the data it holds, the
factors, the benchmarks and the method.
On QuantGPT's side, open your account page. Under
Keys for your AI, the connection shows as a key labelled connector: plus the
name ChatGPT registered. Revoke it there to end the connection.
Backtest a 200-day moving average rule on SPY and show the losing years
If ChatGPT answers from memory instead of calling QuantGPT, name the app, as OpenAI's own
guide suggests: Use the QuantGPT app: backtest a 200-day moving average rule on SPY and show the losing years.
Your AI picks the tool and the settings. It may test the rule on SPY itself, or on the S&P 500 index with the closest built-in rule (the 10-month average, or the 50-day and 200-day golden cross). Ask it to say which tool it called and with what settings, so you know exactly what was tested.
A backtest answers with the numbers behind it, not a summary. Your AI receives:
confirmed, tradeoff or
rejected) with the sentence that says what the label means.fetch_job.Two limits travel with the numbers. Companies that later delisted are not in the market-wide backtest universe yet (a fix is in progress), so a backtest across the whole market leans toward survivors; a rule on one index, or on a list of tickers you choose, is not affected. And a backtest shows what happened in the past, not what will happen. QuantGPT's server instructions ask your AI to say so when it reports a market-wide result.
On connect, QuantGPT lists 19 tools: 14 research tools, and 5 that switch on the rest by
category (equities, portfolio, macro,
alt_markets, events, charts and desk).
The server also sends your AI instructions when it connects: what the data holds, the method,
and how the tools fit together.
| TOOL | WHAT IT DOES |
|---|---|
search, fetch | Find and open QuantGPT's own records to cite: library strategies, study write-ups, forum threads, your saved studies and glossary terms, each with a link. |
describe_ | The full map: every factor, benchmark and timing rule, the library's categories, what each result label means, and the method. Your AI should call it first. |
guide, get_ | A step-by-step course for new users, and ready-made prompts matched to the tools that answer them. |
search_ | Search 175 documented strategies, 63 of them runnable. |
run_ | Backtest criteria (up to 8 filters and a ranking, or a list of tickers you choose), or up to 100 variants in one call. |
challenge_ | The skeptic pass: eleven checks that try to break a result, strongest objection first. |
fetch_ | Collect a slow run that answered with a job id. |
grade_ | One stock's grades on six dimensions against the market, and a read that puts the strongest objection first. Never an order. |
query_ | Read-only SQL over every research database, and the map of its tables. |
available_ | See the other categories, switch them on for your key, or run any tool by name. |
Every tool can be called at any time. If ChatGPT does not see a tool, ask it to run the tool
by name through call_tool. After it switches on a category, open the app at
chatgpt.com/plugins and select Refresh to pull the new tools into ChatGPT's list.
https://terminal.quantgpt.co/mcp, with https and the /mcp
path. Delete the draft app and create it again.Use the QuantGPT app.slow down means the limit of 120 requests a minute per account: wait a minute.connector: key on your QuantGPT account
page, and delete the app in ChatGPT's app settings.On ChatGPT Free or Go, or anywhere you cannot add an app, open QuantGPT's setup prompt, copy all of it, and paste it as the first message of a new ChatGPT chat. ChatGPT then knows what QuantGPT holds, the method and the first steps, and walks you through them. It cannot run studies itself: you run them in the terminal and bring the numbers back.
AI calls are counted per account, across all your keys and connections: 5 for the life of a Free account, 5 during a 3-day trial, 500 a day on QuantGPT and 1,500 a day on QuantGPT Pro. Only tool calls count toward those; connecting and listing tools do not. Daily counts reset at midnight UTC. Separately, each account can make at most 120 requests a minute.
No QuantGPT tool can place, change or cancel an order. A few save things to your own QuantGPT account, such as a saved study or an alert. QuantGPT is research software: it reads market history and reports what happened, losing years included. Nothing here is investment advice.
Yes. Custom MCP apps come with ChatGPT's developer mode, which OpenAI offers to Plus, Pro, Business, Enterprise and Education accounts, on the web. ChatGPT Free and Go cannot add QuantGPT as an app. Any plan can use the setup prompt instead, but ChatGPT cannot run studies through it.
No. ChatGPT signs in to QuantGPT (OAuth), and the connection appears on your account page as a key labelled connector:, which you can revoke. OpenAI's documentation says ChatGPT cannot present a custom API key to an MCP server, so the sign-in is how it connects.
In developer mode, ChatGPT treats any tool without a read-only marker as a write action and asks before it runs. QuantGPT's tools do not carry that marker. None of them can place, change or cancel an order; a few save things to your own QuantGPT account, such as a study or an alert. You can let ChatGPT remember your answer for a tool for the rest of that chat.
The Free plan gives 5 backtests and 5 AI calls for the life of the account, with no card. QuantGPT is $49 a month with 500 AI calls a day, and QuantGPT Pro is $149 a month with 1,500 a day. Both paid plans start with a 3-day trial that includes 5 backtests and 5 AI calls.
No. No QuantGPT tool can place, change or cancel an order. QuantGPT is research software: it reads market history and reports what happened, losing years included. What you do with a result is your decision, at your own broker.
US stocks and indexes (the S&P 500 from 1928, single stocks thin before 1980), fundamentals joined by filing date (about 9% of rows still carry the quarter-end date; a fix is in progress), crypto with funding rates, commodities, FRED macro series, prediction markets, sports odds and weather, plus a library of 175 documented strategies, 63 of them runnable. Companies that later delisted are not in the market-wide backtest universe yet, so market-wide results lean toward survivors.
Facts about ChatGPT come from its maker's own public pages, as of September 2026, and may have changed since:
Facts about QuantGPT come from QuantGPT's own server and plans.
CHATGPT IS A TRADEMARK OF ITS OWNER; NO AFFILIATION OR ENDORSEMENT IS IMPLIED. QUANTGPT IS A RESEARCH TOOL, NOT INVESTMENT ADVICE. BACKTESTS ARE NOT PROMISES. THE TERMS GOVERN.