Six Open-Source MCP Servers for Financial & Research Data, Plus a Number-Verification Lesson
Avarieux · reddit · 2026-09-05
A developer who has been publishing MCP servers for five months shares six open-source projects (TypeScript/Python) and the most important lesson from building finance-data agents.
The servers:
- financial-hub-mcp: SEC EDGAR filings, XBRL financials, FRED indicators
- global-sentinel-mcp: unified Polymarket, GDELT, OpenSky, Cloudflare Radar
- live-audio-intelligence-mcp: live financial webcast transcription
- stealth-agent-browser-mcp: Chromium with accessibility tree + set-of-mark vision
- nifti-inspector-mcp / neuro-research-discovery-mcp: neuroimaging data
The core lesson: once an agent can quote a number, it will quote the right number under the wrong label — segment revenue presented as total revenue, last year's figure as this year's. Not hallucination, mislabeling. The hardest part was binding a quoted number to the concept its sentence names, not just checking it exists in the payload. This grew into a full product: an AI research terminal verifying every figure against the filing before display.
Bonus: the author got a PR merged into the official modelcontextprotocol/servers repo (tool annotations on the memory server).
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