ddmcproxy

ddmcproxy

A multi-org proxy for the Datadog MCP Server.

The Datadog MCP server does not support multiple organizations in a single connection. ddmcproxy sits in front of it, mirrors all of its tools, and adds an org argument to each tool. When a tool is called, the proxy picks the matching org's credentials and forwards the request to the Datadog MCP server.

Claude Code ──stdio──▶ ddmcproxy ──HTTP(token or DD_API_KEY/DD_APPLICATION_KEY)──▶ Datadog MCP
                          │
                          ├─ org=foo ─▶ foo's credentials
                          └─ org=bar ─▶ bar's credentials

Install

go install github.com/winebarrel/ddmcproxy/cmd/ddmcproxy@latest

Configuration

Create a YAML config file. Values are passed through os.ExpandEnv, so secrets can be referenced as ${ENV_VAR} instead of being written in plain text.

# ddmcproxy.yml

# Optional. Default: https://mcp.datadoghq.com/api/unstable/mcp-server/mcp
# endpoint: https://mcp.datadoghq.com/api/unstable/mcp-server/mcp

orgs:
  # Each org authenticates with EITHER a token (a PAT or SAT) OR the legacy
  # api_key + app_key pair -- not both.
  - name: foo
    token: ${FOO_DD_TOKEN}
  - name: bar
    api_key: ${BAR_DD_API_KEY}
    app_key: ${BAR_DD_APP_KEY}
    # Optional per-org endpoint override (e.g. for a different Datadog site).
    # endpoint: https://mcp.datadoghq.eu/api/unstable/mcp-server/mcp

Authentication per org is one of:

• token: a Datadog Personal Access Token (ddpat_) or Service Access Token (ddsat_), sent as an Authorization: Bearer header. Preferred.
• api_key + app_key: the legacy API key and Application key pair.

Usage

Usage: ddmcproxy --config=STRING [flags]

Flags:
  -h, --help             Show help.
  -c, --config=STRING    Config file path ($DDMCPROXY_CONFIG).
      --version

Claude Code

Register it as an MCP server:

{
  "mcpServers": {
    "datadog": {
      "command": "ddmcproxy",
      "args": ["--config", "/path/to/ddmcproxy.yml"]
    }
  }
}

Then call a tool with the target org, e.g.:

Using the foo org, search Datadog logs for errors in the last hour.

Every proxied tool gains a required org argument whose allowed values are the org names from your config.

How it works

• On startup the proxy connects to the Datadog MCP server as the first configured org and lists the available tools. All orgs are assumed to expose the same set of tools.
• Each upstream tool is re-registered with a required org string argument (enumerated over the configured org names).
• On a tool call, the proxy strips the org argument, looks up that org's credentials, connects (lazily, then cached) to the Datadog MCP server -- with an Authorization: Bearer token, or the DD_API_KEY / DD_APPLICATION_KEY headers -- and forwards the call.