JSON Contracts

Verified Integration

Author: @the•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect JSON Contracts to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "json-contracts": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-json-contracts"
      ],
      "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 Git-controlled JSON contracts, rules, examples, and JSON Schema validation to enable agents to reliably convert natural language requests into schema-valid JSON.

Indexed Date

7/21/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for JSON Contracts

You can pass app or system variables as 'context' to JSON Contracts. This context is then used by the contracts (rules and examples) to guide the model's interpretation, ensuring relevant information is available without cluttering user prompts.

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