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History Graph Protocol

Verified Integration
Author: @wgsim•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Git#Filesystem#AI#GitHub#Node.js

Client Configuration

— Connect History Graph Protocol to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "history-graph-protocol": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-history-graph-protocol"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Provides AI agents with a permanent, append-only causal history of their actions and decisions.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for History Graph Protocol

HGP achieves this through a directed acyclic causal graph linking operations and a detailed evidence trail. Any decision can cite other operations as evidence, allowing you to reconstruct the exact rationale, supporting information, and reasoning behind an agent's actions.

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