How to Automate Publishing with GitHub Actions

The MCP Registry is currently in preview. Breaking changes or data resets may occur before general availability. If you encounter any issues, please report them on GitHub.

Step 1: Create a Workflow File

In your server project directory, create a .github/workflows/publish-mcp.yml file. Here is an example for npm-based local server, but the MCP Registry publishing steps are the same for all package types:

OIDC authentication (recommended)

name: Publish to MCP Registry

on:
  push:
    tags: ["v*"] # Triggers on version tags like v1.0.0

jobs:
  publish:
    runs-on: ubuntu-latest
    permissions:
      id-token: write # Required for OIDC authentication
      contents: read

    steps:
      - name: Checkout code
        uses: actions/checkout@v5

      ### Publish underlying npm package:

      - name: Set up Node.js
        uses: actions/setup-node@v5
        with:
          node-version: "lts/*"

      - name: Install dependencies
        run: npm ci

      - name: Run tests
        run: npm run test --if-present

      - name: Build package
        run: npm run build --if-present

      - name: Publish package to npm
        run: npm publish
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

      ### Publish MCP server:

      - name: Install mcp-publisher
        run: |
          curl -L "https://github.com/modelcontextprotocol/registry/releases/latest/download/mcp-publisher_$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/').tar.gz" | tar xz mcp-publisher

      - name: Authenticate to MCP Registry
        run: ./mcp-publisher login github-oidc

      # Optional:
      # - name: Set version in server.json
      #   run: |
      #     VERSION=${GITHUB_REF#refs/tags/v}
      #     jq --arg v "$VERSION" '.version = $v' server.json > server.tmp && mv server.tmp server.json

      - name: Publish server to MCP Registry
        run: ./mcp-publisher publish

Step 2: Add Secrets

You may need to add a secret to the repository depending on which authentication method you choose:

• GitHub OIDC Authentication: No dedicated secret necessary.
• GitHub PAT Authentication: Add a MCP_GITHUB_TOKEN secret with a GitHub Personal Access Token (PAT) that has read:org and read:user scopes.
• DNS Authentication: Add a MCP_PRIVATE_KEY secret with your Ed25519 private key.

You may also need to add secrets for your package registry. For example, the workflow above needs an NPM_TOKEN secret with your npm token.

For information about how to add secrets to a repository, see Using secrets in GitHub Actions.

Step 3: Tag and Release

Create and push a version tag to trigger the workflow:

git tag v1.0.0
git push origin v1.0.0

The workflow will run tests, build the package, publish the package to npm, and publish the server to the MCP Registry.

Troubleshooting

Error Message	Action
”Authentication failed”	Ensure id-token: write permission is set for OIDC, or check secrets.
”Package validation failed”	Verify your package successfully published to the package registry (e.g., npm, PyPI), and that your package has the necessary verification information.