Mastering Financial Markets for ChatGPT

com.masteringfinancialmarkets/mfm

Read-only fundamentals of developed-market listed companies from official filings, with dates.

client:ChatGPT transport:streamable-http tools:3

Install Mastering Financial Markets in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://masteringfinancialmarkets.com/ai/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs