examples/fastmcp_config/env_interpolation_example.json

{
  "$schema": "https://gofastmcp.com/schemas/fastmcp_config/v1.json",
  "entrypoint": "src/server.py:app",
  "environment": {
    "python": "3.12",
    "dependencies": ["fastmcp", "httpx", "pandas"]
  },
  "deployment": {
    "transport": "http",
    "host": "0.0.0.0",
    "port": 8000,
    "env": {
      "API_BASE_URL": "https://api.${ENVIRONMENT}.example.com",
      "DATABASE_URL": "postgres://${DB_USER}:${DB_PASS}@${DB_HOST}:${DB_PORT}/${DB_NAME}",
      "CACHE_PREFIX": "myapp_${ENVIRONMENT}_v1",
      "LOG_LEVEL": "${LOG_LEVEL}",
      "FEATURE_FLAGS": "${FEATURE_FLAGS}"
    }
  }
}