Who MCP Server

WHO Global Health Observatory — 3,059 indicators across 194 member states.

Remote serverstreamable-http

What is the Who MCP Server?

WHO Global Health Observatory — 3,059 indicators across 194 member states.

What it actually does

  • Declarative tool definitions — single file per tool, framework handles registration and validation
  • Unified error handling across all tools
  • Pluggable auth (none, jwt, oauth)
  • Swappable storage backends: in-memory, filesystem, Supabase, Cloudflare KV/R2/D1
  • Structured logging with optional OpenTelemetry tracing
  • Runs locally (stdio/HTTP) or on Cloudflare Workers from the same codebase

Configuration

  • Bun v1.3.2 or higher (or Node.js ≥24). - No API key required — the WHO GHO API is public.

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

ToolWhat it does
who_search_indicatorsSearch the GHO indicator catalog by keyword in indicator names
who_list_indicatorsBrowse the full indicator catalog with pagination
who_get_indicator_metadataFetch indicator names and supported filter dimensions for up to 10 codes
who_list_dimensionsList all dimension type codes available in the GHO API
who_list_dimension_valuesList valid codes and labels for a dimension type (COUNTRY, REGION, SEX, etc.)
who_query_indicator_dataQuery data rows for an indicator with spatial, temporal, and dimension filters

How to install the Who MCP Server

{
  "mcpServers": {
    "who-gho-mcp-server": {
      "type": "stdio",
      "command": "bunx",
      "args": ["@cyanheads/who-gho-mcp-server@latest"],
      "env": {
        "MCP_TRANSPORT_TYPE": "stdio",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

  • Bun v1.3.2 or higher (or Node.js ≥24). - No API key required — the WHO GHO API is public.
VariableDescriptionRequired
MCP_TRANSPORT_TYPEConfiguration value read at startup.Optional
MCP_LOG_LEVELConfiguration value read at startup.Optional
MCP_HTTP_ENDPOINT_PATHFilesystem location the server is allowed to use.Optional
MCP_PUBLIC_URLEndpoint or connection string the server talks to.Yes
GHO_BASE_URLEndpoint or connection string the server talks to.Yes

Example prompts to try

  • “Use Who to who search indicators.”
  • “Use Who to who list indicators.”
  • “Use Who to who get indicator metadata.”