Proof Layer

Overview

Proof Layer is a Model Context Protocol server that generates signed, hash-chained provenance receipts for AI agent actions. Any MCP-compatible AI assistant can call Proof Layer's tools directly, letting the model decide when to use them during conversations or agent runs.

The server runs locally via the npm package @proof-layer/mcp, which communicates over stdio. You'll need to set the PROOF_LAYER_API_KEY environment variable to authenticate. The latest release is v1.0.1 under the MIT license, with source code available at World-999-Labs/proof-layer on GitHub.

Proof Layer sits in the AI & Agents category and integrates with MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this server, you can claim this listing to verify ownership, earn a Verified badge, and keep information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "proof_layer": {
      "command": "npx",
      "args": [
        "-y",
        "@proof-layer/mcp"
      ],
      "env": {
        "PROOF_LAYER_API_KEY": "<proof-layer-api-key>"
      }
    }
  }
}

Requires PROOF_LAYER_API_KEY