http hook

Claude Code (Project)

Add a single JSON hook to your project’s .claude/settings.json. Governance applies to every tool call in that project.

API key required

You need a Neptrix API key to complete this setup. Sign up free to get one.

Installation

1Copy the configuration below
2Create or open .claude/settings.json in your project root
3Paste the configuration and replace YOUR_API_KEY with your key
4Restart Claude Code — every tool call in this project now goes through Neptrix

Add this configuration to.claude/settings.json

.claude/settings.json

1{
2  "hooks": {
3    "PreToolUse": [
4      {
5        "matcher": ".*",
6        "hooks": [
7          {
8            "type": "http",
9            "url": "https://qpthort-backend-production.up.railway.app/hooks/claude-code/pre-tool-use?api_key=YOUR_API_KEY",
10            "timeout": 5000
11          }
12        ]
13      }
14    ]
15  }
16}

Replace YOUR_API_KEY with your API key. Sign up to get your key.

How it works

Agent proposes action

Before each tool call, your agent sends the proposed action to Neptrix for evaluation.

Neptrix evaluates

Constitutional governance rules evaluate the action. The decision is logged to your audit trail.

Decision returned

ALLOW, BLOCK, ESCALATE, or MODIFY. Agents auto-discover — no registration needed.

Ready to govern your agents?

Create a free account, generate an API key, and have governance running in under 5 minutes.

Get started for free