Massive Financial Connector

Full Massive (Polygon) market-data connector with secure local key handling. Starts the official MCP server and supports endpoint discovery, endpoint docs, g...

Use Massive/Polygon as the primary market-data source.

Required environment

• Require MASSIVE_API_KEY in local environment.
• Never print, commit, or upload API keys.
• Accept both quoted and unquoted local env values.
• If auth fails with Unknown API Key, verify local shell env and active key status in Massive dashboard.

Full capability mode (official MCP server)

Start the official Massive MCP server (all features from mcp_massive):

scripts/start-mcp-server.sh

This exposes the full MCP toolset:

• search_endpoints
• get_endpoint_docs
• call_api
• query_data

With these, you can cover the full repo workflow: endpoint discovery, docs lookup, generic market API access, storing/querying data with SQL, and post-processing functions.

Quick commands (common checks)

Run from this skill directory:

scripts/get-last-trade.sh AAPL
scripts/get-prev-close.sh AAPL
scripts/get-agg-day.sh AAPL 2026-03-05

Output rules

• Return concise numeric result first (e.g., last trade price), then timestamp/exchange metadata.
• If Massive is unavailable, state failure explicitly and ask whether to use a fallback source.
• For investment-style prompts, add a short non-advice disclaimer.

Included scripts

• scripts/start-mcp-server.sh: launch official Massive MCP server (full functionality).
• scripts/get-last-trade.sh <SYMBOL>: latest trade snapshot.
• scripts/get-prev-close.sh <SYMBOL>: previous close and change context.
• scripts/get-agg-day.sh <SYMBOL> <YYYY-MM-DD>: daily OHLCV bar.