Publish Mcp Server

Publish an MCP server

End-to-end distribution pipeline for a TypeScript/Node MCP server, distilled from the real mcp-itglue release (July 2026). Work the phases in order — later phases validate against earlier ones (the MCP registry checks npm; directories check both).

Driver: run the check.mjs bundled next to this skill, from the repo root — node "/check.mjs" [--online], where ` is wherever the skill is installed (~/.claude/skills/publish-mcp-server/, .claude/skills/publish-mcp-server/, or as a plugin $CLAUDEPLUGINROOT/skills/publish-mcp-server/). Run it before starting (shows what's missing), after each phase, and with --online` at the end (verifies npm/registry/tag are in sync). Exit 1 = blocking issues.

Phase 1 — npm packaging

package.json needs: bin (entry file with #!/usr/bin/env node shebang in the source, tsc preserves it), files: ["dist", "README.md", "LICENSE"], "prepublishOnly": "npm run build", mcpName: "io.github./", repository/homepage/bugs, license, engines, and mcp-server in keywords. Check name availability: npm view → E404 means free.

Smoke-test the actual tarball, not the source tree:

npm pack --pack-destination /tmp
cd /tmp && npx -y ./-.tgz           # missing env vars → clean error, not a stack trace
printf '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"smoke","version":"0.0.1"}}}\n' \
  | API_KEY_VAR=dummy npx -y ./-.tgz | head -1   # must return an initialize result

Publish: npm login && npm publish. npm now requires 2FA on the account — a bare publish returns 403 Two-factor authentication ... required if 2FA isn't enabled (classic automation tokens no longer exist; for CI use a granular token with "Bypass 2FA" — 90-day max — or OIDC trusted publishing).

Phase 2 — official MCP registry

server.json at repo root, schema https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json: name = the mcpName value, description ≤100 chars (422 otherwise), version in TWO places (top level + packages[0]), npm package entry with runtimeHint: "npx", stdio transport, environmentVariables (mark keys isSecret).

Publish after npm is live (the registry fetches the tarball to verify mcpName):

brew install mcp-publisher
mcp-publisher login github     # device-code flow; authorizes io.github./*
mcp-publisher publish          # reads ./server.json

Verify: curl -s "https://registry.modelcontextprotocol.io/v0/servers?search=&version=latest"

Phase 3 — Claude Desktop bundle (.mcpb)

manifest.json (manifest_version: "0.3") with server.mcp_config (command: node, args: ["${__dirname}/dist/index.js"], env from ${user_config.*}) and user_config fields (sensitive: true for keys). Build via a staging script that copies manifest + dist + package files and runs npm ci --omit=dev there, then npx -y @anthropic-ai/mcpb pack .mcpb — packing the repo root drags in devDependencies. Gitignore *.mcpb and the staging dir. Reference implementation: scripts/bundle.mjs in github.com/selic/mcp-itglue.

Phase 4 — release automation

Workflow on push: tags: ["v*"]: build → test → npm publish → bundle → GitHub release with the .mcpb attached (softprops/action-gh-release@v2, permissions: contents: write, id-token: write for provenance). Make the npm-publish step skip when the version is already live or NPM_TOKEN is unset — so manual publishing doesn't fail the release. Reference: .github/workflows/release.yml in github.com/selic/mcp-itglue.

Release: bump version in package.json + server.json (×2) + manifest.json (the checker enforces lockstep), merge, then git tag vX.Y.Z && git push origin vX.Y.Z.

Phase 5 — directories (optional, after the above)

• Glama — submit at glama.ai/mcp/servers (login required; ~400-char description

limit in the form). Add glama.json to the repo root: {"$schema": "https://glama.ai/mcp/schemas/server.json", "maintainers": [""]}

• awesome-mcp-servers (punkpeye) — one line, alphabetical, in the right category;

their bot requires a Glama score badge on the entry before merge. PR titles ending 🤖🤖🤖 opt into the agent fast-track (per their CONTRIBUTING).

• Docker MCP Catalog — PR to docker/mcp-registry: servers//server.yaml

(copy servers/grafana/server.yaml as template; run.command must force --transport stdio if the image defaults to HTTP) plus tools.json — generate it from the live server's tools/list so their CI doesn't need credentials (missing tools.json is their most common PR blocker).

• Cline marketplace — issue on cline/mcp-marketplace; needs a 400×400 PNG logo

(commit to assets/logo.png, reference the raw URL) and an honest tick of "tested that Cline can set up the server from README alone" — actually run that test in Cline first. Prefill the issue form via URL query params (field ids: repo-url, logo, additional-info).

• mcpservers.org / mcpmarket.com — web forms, free tiers exist ($39/$29 paid tiers

are optional). mcpmarket free queue is ~4–6 weeks.

Gotchas (each one cost real time)

• git tag alone does nothing — the release workflow triggers on tag push only.
• A tag pointing at a commit before the workflow file existed runs nothing.
• The registry JWT from mcp-publisher login github expires in well under an hour —

expect the device-code dance on every publish.

• server.json description >100 chars → 422 at publish time, not at authoring time.
• Desktop hosts (MCPB) pass unset optional user_config as empty strings — env

parsing must use ||-style fallbacks, not ??, or an empty BASE_URL overrides the default. The checker greps for this.

• MCP clients (Cline, Claude Code) write .mcp.json with the API key inside into

the repo dir during testing — gitignore it before it lands in a commit.

• npm view on the freshly published package can lag a few seconds; registries

and badge CDNs cache harder (minutes).

• npx -y from inside the repo resolves the local package (same name) and

fails with command not found — run the npx smoke test from any other directory.

Verify (end state)

node "/check.mjs" --online                         # all ✓ (see Driver above)
(cd /tmp && npx -y @ --help)                   # from OUTSIDE the repo — see gotchas
gh release view v --json assets                      # .mcpb attached

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: selic
• Source: selic/skills
• License: MIT

Install and usage instructions live in the source repository linked above.