#MCP Registry

The repository publishes two MCP servers to the official MCP Registry:

• io.github.smbcloudXYZ/smbcloud-cli — the smb --mcp server for smbCloud projects, Mail, Auth, tenants, and deployments.
• io.github.smbcloudXYZ/xcrs — XCRS Mobile & TV Automation, available through xcrs --mcp or smb --mcp --scope automation for Xcode, ControlKit, CoreDevice, and adb workflows.

The registry is a metadata index — it doesn't host binaries. The smbCloud listing offers the hosted Streamable HTTP server as well as packages published to npm and NuGet, while the standalone XCRS listing points at the xcrs crate on crates.io.

For running and configuring the server itself, see MCP Server.

#What makes up the listing

The registry checks each listed package for a marker naming the server. If the marker is missing or doesn't match name in server.json, publishing fails with "Registry validation failed for package".

The markers ship inside the published artifacts, so they have to be in place before the npm and NuGet packages are built — a version published before the marker landed can never be listed, since neither registry lets you overwrite a version. The publish workflow checks the real published artifacts (not just the sources in this repo) and stops early if a marker is missing.

#Why the name is io.github.smbcloudXYZ/...

The namespace has to match the authentication method. We authenticate with GitHub OIDC from Actions, which grants the io.github.smbcloudXYZ/* namespace (the reverse-DNS form of the smbcloudXYZ org).

The casing matters. The registry grants the namespace with the org's exact GitHub casing, and compares case-sensitively — io.github.smbcloudxyz/... is rejected with a 403 even though GitHub itself treats org names case-insensitively. Every marker has to use the same smbcloudXYZ spelling.

Publishing under xyz.smbcloud/* instead would mean domain-based auth: a v=MCPv1 TXT record on smbcloud.xyz plus an Ed25519 private key stored as a repo secret. OIDC needs no secret at all, so that's what we use.

#Available connections

• Hosted — Streamable HTTP at https://api.smbcloud.xyz/v1/mcp.

• npm — @smbcloud/cli, launched as npx @smbcloud/cli --mcp. The package declares a single binary (smb), so npx resolves it despite the name difference.

• NuGet — SmbCloud.Cli, launched as dnx SmbCloud.Cli --mcp.

PyPI is deliberately not listed. The smbcloud-cli wheel installs its executable as smb (maturin bindings = "bin"), and uvx smbcloud-cli looks for an executable matching the distribution name, so the launch command the registry hands to clients wouldn't work. Adding PyPI would mean shipping an extra console script named smbcloud-cli. Homebrew and the direct GitHub release binaries have no registry package type at all; those install paths stay documented in Install.

#Releasing a new version

Each server metadata file carries its version twice — once for the server, once per package — and both are updated by make patch | minor | major along with the rest of the release metadata (scripts/sync-release-version.mjs).

Publishing is chained off the release: pushing a v* tag runs the crates.io workflow, which fans out to the distribution workflows, and NuGet CLI Release triggers MCP Registry Release once its publish job succeeds. It hangs off NuGet rather than the fan-out because the listing needs both npm and NuGet live at that version, and NuGet is the slower of the two.

The registry fetches the package metadata during publish, so @smbcloud/cli@<version> and SmbCloud.Cli <version> must already exist. npm is queryable within seconds of publishing; nuget.org validates first and takes roughly 5–15 minutes to reach the flat container. The workflow polls both for up to ten minutes rather than failing on that gap.

To publish by hand — a re-run after a transient failure, say — dispatch it with the tag:

gh workflow run release-mcp-registry.yml -f tag=v0.4.13

Confirm both listings afterwards:

curl "https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.smbcloudXYZ/smbcloud-cli"
curl "https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.smbcloudXYZ/xcrs"

#Publishing by hand

Rarely needed, but if Actions is unavailable:

brew install mcp-publisher
mcp-publisher login github        # device flow, needs push access to smbcloudXYZ
mcp-publisher publish             # reads ./server.json

The release workflow publishes server.json, then temporarily swaps in server-xcrs.json and publishes the standalone entry as well. Versions are immutable — republishing the same version is rejected. Fixing a bad listing means shipping a new patch version.