How to integrate Signpath MCP with Atomic Agent

Connect Atomic Agent to Signpath MCP. List all available code signing certificates, show all projects for your organization, and more using natural language, with authentication handled for you.

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Api Key

Signpath is a code signing service that automates the secure signing of your software artifacts. It ensures authenticity and integrity for every release, right from your CI/CD pipeline.

5 Tools

Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Signpath.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Signpath account. See the Atomic Agent documentation for installation instructions.

Also integrate Signpath with

How Atomic Agent connects to Signpath

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect Signpath to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
  3. Ask Atomic Agent to do something in Signpath. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your Signpath account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

What is the Signpath MCP server, and what's possible with it?

The Signpath MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Signpath account. It provides structured and secure access to your code signing workflows, so your agent can list certificates, retrieve project details, access signing policies, and check system metadata automatically on your behalf.

  • Certificate management and discovery: Quickly list all available code signing certificates within your organization, making it easy for your agent to select the right certificate for each workflow.
  • Automated project listing and tracking: Let your agent fetch and paginate through all Signpath projects, helping you organize, monitor, and automate signing across multiple software projects.
  • Signing policy insights and selection: Effortlessly retrieve detailed information about your organization’s signing policies, so your agent can ensure every artifact is signed according to security best practices.
  • System information and environment awareness: Instantly access Signpath system details, including product info, API version, and environment metadata, to keep your agent up to date with the latest platform capabilities.

Use Signpath from Atomic Agent

With your account connected, ask Atomic Agent to work with Signpath in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

TOOLS

Supported Tools

Every Signpath action and event your agent gets out of the box.

Get Health Check

Tool to check if the SignPath API is healthy and operational.

List Certificates

Retrieve all certificates available in a SignPath organization.

List Projects

Tool to list all projects for an organization.

Retrieve Signing Policy Details

Retrieve signing policy details for code signing operations.

Retrieve System Info

Retrieves SignPath system information including the application version and the web UI base URL.

FAQ

Frequently asked questions

With a standalone Signpath MCP server, the agents and LLMs can only access a fixed set of Signpath tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Signpath and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Signpath tools.

Yes, absolutely. You can configure which Signpath scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Signpath data and credentials are handled as safely as possible.

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