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docs: pin and verify mcp-publisher in the GitHub Actions publishing workflow #1624

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56 changes: 53 additions & 3 deletions docs/modelcontextprotocol-io/github-actions.mdx
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Expand Up @@ -11,6 +11,8 @@ sidebarTitle: GitHub Actions

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:

**Important: Pin the version and verify the signature.** When running a downloaded binary in a job holding your publishing credential, always pin to an explicit released version (never `latest`, which is mutable) and verify the signature before extracting. Look up the latest `mcp-publisher` version on [the releases page](https://github.com/modelcontextprotocol/registry/releases).

<CodeGroup>

```yaml OIDC authentication (recommended)
Expand Down Expand Up @@ -54,9 +56,25 @@ jobs:

### Publish MCP server:

- name: Install Cosign
uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2

- name: Install mcp-publisher
env:
MCP_PUBLISHER_VERSION: v1.8.1
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
export OS=$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/')
curl -fsSL -o mcp-publisher.tar.gz \
"https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}/mcp-publisher_${OS}.tar.gz"
curl -fsSL -o mcp-publisher.tar.gz.sigstore.json \
"https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}/mcp-publisher_${OS}.tar.gz.sigstore.json"
cosign verify-blob \
--bundle mcp-publisher.tar.gz.sigstore.json \
--certificate-identity-regexp="^https://github.com/modelcontextprotocol/registry/\.github/workflows/release\.yml@refs/tags/v[0-9]" \
--certificate-oidc-issuer="https://token.actions.githubusercontent.com" \
mcp-publisher.tar.gz
tar xzf mcp-publisher.tar.gz mcp-publisher
rm mcp-publisher.tar.gz mcp-publisher.tar.gz.sigstore.json

- name: Authenticate to MCP Registry
run: ./mcp-publisher login github-oidc
Expand Down Expand Up @@ -115,9 +133,25 @@ jobs:

### Publish MCP server:

- name: Install Cosign
uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2

- name: Install mcp-publisher
env:
MCP_PUBLISHER_VERSION: v1.8.1
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
export OS=$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/')
curl -fsSL -o mcp-publisher.tar.gz \
"https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}/mcp-publisher_${OS}.tar.gz"
curl -fsSL -o mcp-publisher.tar.gz.sigstore.json \
"https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}/mcp-publisher_${OS}.tar.gz.sigstore.json"
cosign verify-blob \
--bundle mcp-publisher.tar.gz.sigstore.json \
--certificate-identity-regexp="^https://github.com/modelcontextprotocol/registry/\.github/workflows/release\.yml@refs/tags/v[0-9]" \
--certificate-oidc-issuer="https://token.actions.githubusercontent.com" \
mcp-publisher.tar.gz
tar xzf mcp-publisher.tar.gz mcp-publisher
rm mcp-publisher.tar.gz mcp-publisher.tar.gz.sigstore.json

- name: Authenticate to MCP Registry
run: ./mcp-publisher login github --token ${{ secrets.MCP_GITHUB_TOKEN }}
Expand Down Expand Up @@ -172,9 +206,25 @@ jobs:

### Publish MCP server:

- name: Install Cosign
uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2

- name: Install mcp-publisher
env:
MCP_PUBLISHER_VERSION: v1.8.1
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
export OS=$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/')
curl -fsSL -o mcp-publisher.tar.gz \
"https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}/mcp-publisher_${OS}.tar.gz"
curl -fsSL -o mcp-publisher.tar.gz.sigstore.json \
"https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}/mcp-publisher_${OS}.tar.gz.sigstore.json"
cosign verify-blob \
--bundle mcp-publisher.tar.gz.sigstore.json \
--certificate-identity-regexp="^https://github.com/modelcontextprotocol/registry/\.github/workflows/release\.yml@refs/tags/v[0-9]" \
--certificate-oidc-issuer="https://token.actions.githubusercontent.com" \
mcp-publisher.tar.gz
tar xzf mcp-publisher.tar.gz mcp-publisher
rm mcp-publisher.tar.gz mcp-publisher.tar.gz.sigstore.json

# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
# TODO: Replace `example.com` with your domain name
Expand Down
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