stock-historical-index

name	stock-historical-index
description	Retrieve full historical end-of-day price data for market indices using the Octagon Claude plugin. Use when analyzing index performance over time, tracking market trends, calculating returns, and understanding market context for individual stock analysis.

Stock Historical Index

Retrieve full historical end-of-day price data for market indices using the Octagon Claude plugin.

Prerequisites

Ensure the Octagon Claude plugin is installed and configured in Claude Code before invoking this skill.

Workflow

1. Identify Parameters

Determine your query parameters:

• Index Symbol: ^GSPC (S&P 500), ^DJI (Dow), ^IXIC (NASDAQ), etc.
• Start Date: Beginning of date range
• End Date: End of date range

2. Execute Query via the Octagon Claude plugin

Use the octagon-agent tool with a natural language prompt:

Retrieve full historical end-of-day price data for the <INDEX> index from <START_DATE> to <END_DATE>.

MCP Call Format:

{
  "server": "octagon-claude-plugin",
  "toolName": "octagon-agent",
  "arguments": {
    "prompt": "Retrieve full historical end-of-day price data for the ^GSPC index from 2025-01-01 to 2025-04-30."