Azure DevOps MCP Server

A production-grade Model Context Protocol server for Azure DevOps. Exposes Azure DevOps operations as MCP tools (plus, in later phases, resources and prompts) over stdio (local) and Streamable HTTP (hosted/multi-user).

• TypeScript (ESM, Node 20+)
• ADO access via the official azure-devops-node-api SDK, with an axios REST fallback for endpoints the SDK doesn't cover (search, analytics, etc.)
• Three auth modes: PAT, Azure CLI (az login), On-Behalf-Of + Entra JWT (hosted)
• Per-tool RBAC, destructive-op guard, secret redaction, structured logging, retry with backoff

Status: All 6 phases complete — 113 tools across 13 domains, plus 4 MCP resources and 4 MCP prompts:

• core (7) · repos (15) · pullrequests (12) · workitems (16) · boards (10)
• pipelines (13) · releases (8) · testplans (10) · wiki (7) · search (3) · artifacts (5)
• security (5) · analytics (2)
• Resources: ado://projects, ado://project/{project}/repos, ado://project/{project}/workitem/{id}, ado://project/{project}/repo/{repo}/pullrequest/{prId}
• Prompts: pr-review, release-readiness, sprint-planning, bug-triage

Hardening: per-host circuit breaker, retry w/ backoff + Retry-After, secret redaction, per-tool RBAC + destructive guard, audit logging, ESLint, a Vitest suite (unit + live MCP-protocol test), and an Azure Pipelines CI (azure-pipelines.yml).

1. Prerequisites

• Node.js ≥ 20 and npm
• An Azure DevOps organization you can access
• One of:
  • a Personal Access Token (PAT), or
  • the Azure CLI installed and az login completed, or
  • (hosted) an Entra app registration with the ADO delegated permission, for OBO

2. Install

cd "E:\MCP Servers\ado-mcp-server"
npm install

3. Configure

cp .env.example .env      # PowerShell: Copy-Item .env.example .env

Edit .env. Minimum for a quick local start with the Azure CLI:

ADO_ORG=YourOrgName
ADO_DEFAULT_PROJECT=YourProject
AUTH_MODE=azcli

Auth modes

| AUTH_MODE | Needs | Notes | |---|---|---| | azcli | az login done locally | Easiest for dev. No secrets stored. | | pat | ADO_PAT | PAT scopes must cover the tools you call (e.g. Work Items: Read & Write, Code: Read & Write). | | obo | AZURE_TENANT_ID, AZURE_CLIENT_ID, AZURE_CLIENT_SECRET | HTTP transport only. Validates the caller's Entra JWT, then exchanges it for an ADO token preserving the user's identity. |

A PAT is created in Azure DevOps → User settings → Personal access tokens.

4. Build & run

npm run build      # compile to dist/
npm start          # stdio transport (default)

Development with auto-reload:

npm run dev        # stdio
npm run dev:http   # Streamable HTTP on PORT (default 3000)

Force a transport regardless of TRANSPORT:

node dist/index.js --transport http
node dist/index.js --transport stdio

5. Connect a client

Claude Desktop / VS Code / Claude Code (stdio)

Add to your MCP client config (e.g. Claude Desktop claude_desktop_config.json).

Published package via npx (recommended distribution — no clone, no build):

{
  "mcpServers": {
    "azure-devops": {
      "command": "npx",
      "args": ["-y", "ado-mcp-server"],
      "env": {
        "ADO_ORG": "YourOrgName",
        "ADO_DEFAULT_PROJECT": "YourProject",
        "AUTH_MODE": "pat",
        "ADO_PAT": "<your-pat>"
      }
    }
  }
}

Local build via node (for development on a clone):

{
  "mcpServers": {
    "azure-devops": {
      "command": "node",
      "args": ["E:\\MCP Servers\\ado-mcp-server\\dist\\index.js"],
      "env": {
        "ADO_ORG": "YourOrgName",
        "ADO_DEFAULT_PROJECT": "YourProject",
        "AUTH_MODE": "azcli"
      }
    }
  }
}

The org is never hardcoded — it comes from ADO_ORG in the client's env block, so the same published package serves any org.

Remote / hosted (Streamable HTTP)

node dist/index.js --transport http

Endpoint: POST http://localhost:3000/mcp · health: GET /health. In obo mode every request must carry Authorization: Bearer <Entra access token>.

6. Verify it works

# Health (HTTP mode)
curl http://localhost:3000/health

# From an MCP client, call the connectivity probe tool:
#   ado_get_me      → confirms auth + org connection
#   ado_list_projects

A scripted stdio smoke test (lists tools without calling ADO):

printf '%s\n' \
 '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"smoke","version":"1.0"}}}' \
 '{"jsonrpc":"2.0","method":"notifications/initialized"}' \
 '{"jsonrpc":"2.0","id":2,"method":"tools/list","params":{}}' \
 | ADO_ORG=x AUTH_MODE=pat ADO_PAT=dummy node dist/index.js

7. Publishing (npx distribution)

This server is distributed as an npm package so anyone can run it with npx ado-mcp-server — no clone or build on their side.

npm run build          # compile (also runs automatically via prepublishOnly)
npm version patch      # bump version
npm publish            # publishes; only dist/, README.md, .env.example ship (see "files")

After publishing, the npx client config in §5 works as-is. To test the package contents before publishing:

npm pack --dry-run     # lists exactly what will be uploaded
npm pack               # builds the .tgz locally; install it to smoke-test

Auth for distributed use: prefer AUTH_MODE=pat — each user supplies their own ADO_PAT (and ADO_ORG) in their MCP client's env. azcli only works where the user has the Azure CLI installed and az login completed.

8. Scripts

| Script | Purpose | |---|---| | npm run build | Compile TypeScript → dist/ | | npm start | Run compiled server (stdio) | | npm run start:http | Run compiled server (HTTP) | | npm run dev / dev:http | Watch-mode dev (tsx) | | npm run typecheck | tsc --noEmit | | npm run lint | ESLint | | npm test | Vitest |

9. Configuration reference

See .env.example. Key vars: ADO_ORG, ADO_DEFAULT_PROJECT, ADO_API_VERSION, AUTH_MODE, ADO_PAT, AZURE_TENANT_ID/CLIENT_ID/CLIENT_SECRET, TRANSPORT, PORT, LOCAL_ROLE, LOG_LEVEL, ALLOW_DESTRUCTIVE.

• ALLOW_DESTRUCTIVE — destructive tools (delete_*, complete PR, deploy release, …) are blocked unless this is true.
• LOCAL_ROLE — effective RBAC role in pat/azcli modes (admin/editor/viewer). In obo mode roles come from Entra App Roles on the caller's token.

10. Architecture (short)

transport (stdio | http)
  → server (McpServer + registry)
    → dispatch (RBAC · destructive guard · audit · error envelope)
      → domain tools (Zod schemas)
        → domain services
          → AdoClient (azure-devops-node-api SDK | REST fallback + retry)
            → auth (PAT | AzCli | OBO credential)

Each ADO area is a self-contained module under src/domains/<area>/ exporting a DomainModule. To add an area, create the module and append it to domains in src/server.ts — nothing else changes.

Full walkthrough: see docs/END_TO_END_FLOW.md for how a request travels through every layer (startup, a tool call step by step, auth flows, resources/prompts, reliability, and a worked example).