diff --git a/DOCS.md b/DOCS.md
index eed5cf0..e9b4f57 100644
--- a/DOCS.md
+++ b/DOCS.md
@@ -251,6 +251,7 @@ All options are set via **Settings → Apps/Add-ons → OpenClaw Assistant → C
 
 When `gateway_auth_mode: trusted-proxy` is used, the add-on sets `gateway.auth.trustedProxy.userHeader` to `x-forwarded-user` by default.
 | `force_ipv4_dns` | bool | `false` | Force IPv4-first DNS ordering for Node network calls. Useful if IPv6 DNS resolves but IPv6 egress is broken (can affect Telegram API polling). |
+| `gateway_env_vars` | list of `{name, value}` | `[]` | Environment variables exported to the gateway process at startup. UI format: list entries with `name` and `value` (example: `name=OPENAI_API_KEY`, `value=sk-...`). Limits: max 50 vars, key length 255, value length 10000. Reserved runtime keys are blocked (for example `PATH`, `HOME`, `NODE_OPTIONS`, `NODE_PATH`, `OPENCLAW_*`, proxy vars). Legacy string/object formats are still accepted for backward compatibility. |
 
 ### Terminal
 
diff --git a/openclaw_assistant/CHANGELOG.md b/openclaw_assistant/CHANGELOG.md
index a9533e4..b00b7c8 100644
--- a/openclaw_assistant/CHANGELOG.md
+++ b/openclaw_assistant/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to the OpenClaw Assistant Home Assistant Add-on will be documented in this file.
 
+## [0.5.52] - 2026-02-23
+
+### Added
+- New add-on option `gateway_env_vars` that accepts a list of `{name, value}` objects from Home Assistant UI and safely injects values into the gateway process at startup (max 50 vars, key <=255 chars, value <=10000 chars).
+- Guard `gateway_env_vars` from overriding reserved runtime/proxy/`OPENCLAW_*` keys.
+- Keep legacy string/object input formats for backward compatibility.
+
 ## [0.5.51] - 2026-02-23
 
 ### Fixed
diff --git a/openclaw_assistant/config.yaml b/openclaw_assistant/config.yaml
index fe24ac5..eb873c3 100644
--- a/openclaw_assistant/config.yaml
+++ b/openclaw_assistant/config.yaml
@@ -1,5 +1,5 @@
 name: OpenClaw Assistant
-version: "0.5.51"
+version: "0.5.52"
 slug: openclaw_assistant
 description: Run OpenClaw Assistant (OpenClaw-compatible) as a Home Assistant add-on.
 url: https://github.com/techartdev/OpenClawHomeAssistant
@@ -104,6 +104,19 @@ options:
   # minimal: suppress repetitive HA health-check and polling requests (default)
   nginx_log_level: minimal
 
+  # Environment variables to pass to the gateway process at startup.
+  # Format: list of objects with name/value fields.
+  # Example:
+  #   gateway_env_vars:
+  #     - name: OPENAI_API_KEY
+  #       value: "sk-abc123"
+  #     - name: LOG_LEVEL
+  #       value: "debug"
+  # Reserved keys are blocked to protect runtime/security
+  # (e.g. PATH, HOME, NODE_OPTIONS, NODE_PATH, OPENCLAW_*, proxy vars).
+  # Limits: max 50 variables, max key length 255 chars, max value length 10000 chars
+  gateway_env_vars: []
+
 
 schema:
   timezone: str
@@ -127,5 +140,7 @@ schema:
   gateway_trusted_proxies: str?
   enable_openai_api: bool?
   force_ipv4_dns: bool?
+  gateway_env_vars:
+    - name: "match(^[A-Z_][A-Z0-9_]*$)"
+      value: str
   nginx_log_level: list(full|minimal)?
-
diff --git a/openclaw_assistant/run.sh b/openclaw_assistant/run.sh
index b6f8322..c578e52 100644
--- a/openclaw_assistant/run.sh
+++ b/openclaw_assistant/run.sh
@@ -55,6 +55,9 @@ GATEWAY_TRUSTED_PROXIES=$(jq -r '.gateway_trusted_proxies // empty' "$OPTIONS_FI
 FORCE_IPV4_DNS=$(jq -r '.force_ipv4_dns // true' "$OPTIONS_FILE")
 ACCESS_MODE=$(jq -r '.access_mode // "custom"' "$OPTIONS_FILE")
 NGINX_LOG_LEVEL=$(jq -r '.nginx_log_level // "minimal"' "$OPTIONS_FILE")
+GW_ENV_VARS_TYPE=$(jq -r 'if .gateway_env_vars == null then "null" else (.gateway_env_vars | type) end' "$OPTIONS_FILE")
+GW_ENV_VARS_RAW=$(jq -r '.gateway_env_vars // empty' "$OPTIONS_FILE")
+GW_ENV_VARS_JSON=$(jq -c '.gateway_env_vars // []' "$OPTIONS_FILE")
 
 export TZ="$TZNAME"
 
@@ -189,6 +192,140 @@ export PNPM_HOME="${PERSISTENT_NODE_GLOBAL}/pnpm"
 mkdir -p "$PNPM_HOME"
 export PATH="${PNPM_HOME}:${PATH}"
 
+# Protect critical runtime variables from accidental override via gateway_env_vars.
+is_reserved_gateway_env_var() {
+  case "$1" in
+    # Critical runtime paths/process vars.
+    HOME|PATH|PWD|OLDPWD|SHLVL|TZ|XDG_CONFIG_HOME|PNPM_HOME|NODE_PATH|NODE_OPTIONS|NODE_NO_WARNINGS)
+      return 0
+      ;;
+    # Low-level injection vectors that can alter process/linker/shell behavior.
+    LD_*|DYLD_*|BASH_ENV|ENV|BASH_FUNC_*)
+      return 0
+      ;;
+    # Proxy vars managed by add-on options.
+    HTTP_PROXY|HTTPS_PROXY|NO_PROXY|http_proxy|https_proxy|no_proxy)
+      return 0
+      ;;
+    # Add-on internal control vars.
+    OPENCLAW_*)
+      return 0
+      ;;
+    *)
+      return 1
+      ;;
+  esac
+}
+
+try_export_gateway_env_var() {
+  local key="$1"
+  local value="$2"
+
+  if [ -z "$key" ]; then
+    return 0
+  fi
+
+  # Validate variable name format
+  if ! [[ "$key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]]; then
+    echo "WARN: Invalid environment variable name: '$key' (must start with letter/underscore, skip)"
+    return 0
+  fi
+
+  # Protect critical runtime variables from accidental override.
+  if is_reserved_gateway_env_var "$key"; then
+    echo "WARN: Reserved environment variable '$key' cannot be overridden via gateway_env_vars (skip)"
+    return 0
+  fi
+
+  # Enforce max variable name length
+  if [ ${#key} -gt $max_var_name_size ]; then
+    echo "WARN: Environment variable name too long: '$key' (max $max_var_name_size chars, skip)"
+    return 0
+  fi
+
+  # Enforce max variable value length
+  if [ ${#value} -gt $max_var_value_size ]; then
+    echo "WARN: Environment variable value too long for '$key' (max $max_var_value_size chars, skip)"
+    return 0
+  fi
+
+  # Enforce limit on number of variables
+  if [ $env_count -ge $max_env_vars ]; then
+    echo "WARN: Maximum environment variables limit ($max_env_vars) reached (skip)"
+    return 0
+  fi
+
+  export "$key=$value"
+  env_count=$((env_count + 1))
+  echo "INFO: Exported gateway env var: $key"
+}
+
+# Export gateway environment variables from add-on config
+# These are user-defined variables that should be available to the gateway process.
+# Primary format: array of {name, value} objects.
+if [ "$GW_ENV_VARS_TYPE" = "array" ] || [ "$GW_ENV_VARS_TYPE" = "object" ] || { [ "$GW_ENV_VARS_TYPE" = "string" ] && [ -n "$GW_ENV_VARS_RAW" ]; }; then
+  env_count=0
+  max_env_vars=50
+  max_var_name_size=255
+  max_var_value_size=10000
+
+  if [ "$GW_ENV_VARS_TYPE" = "array" ] && [ "$GW_ENV_VARS_JSON" != "[]" ]; then
+    echo "INFO: Setting gateway environment variables from list config..."
+
+    invalid_entries_count=$(printf '%s' "$GW_ENV_VARS_JSON" | jq '[.[] | select((type != "object") or ((.name | type) != "string") or (has("value") | not))] | length')
+    if [ "$invalid_entries_count" -gt 0 ]; then
+      echo "WARN: Found $invalid_entries_count invalid gateway_env_vars entries; expected objects with 'name' and 'value' keys (skip)"
+    fi
+
+    while IFS= read -r -d '' key && IFS= read -r -d '' value; do
+      try_export_gateway_env_var "$key" "$value"
+    done < <(printf '%s' "$GW_ENV_VARS_JSON" | jq -j '.[] | select((type == "object") and ((.name | type) == "string") and (has("value"))) | .name, "\u0000", (.value | tostring), "\u0000"')
+  elif [ "$GW_ENV_VARS_TYPE" = "object" ] && [ "$GW_ENV_VARS_JSON" != "{}" ]; then
+    # Backward compatibility for old map/object configuration.
+    echo "INFO: Setting gateway environment variables from object config (legacy format)..."
+    while IFS= read -r -d '' key && IFS= read -r -d '' value; do
+      try_export_gateway_env_var "$key" "$value"
+    done < <(printf '%s' "$GW_ENV_VARS_JSON" | jq -j 'to_entries[] | .key, "\u0000", (.value | tostring), "\u0000"')
+  elif [ "$GW_ENV_VARS_TYPE" = "string" ] && [ -n "$GW_ENV_VARS_RAW" ]; then
+    # Preferred for complex values: JSON object string in one line.
+    if printf '%s' "$GW_ENV_VARS_RAW" | jq -e 'type == "object"' >/dev/null 2>&1; then
+      echo "INFO: Setting gateway environment variables from JSON string config..."
+      while IFS= read -r -d '' key && IFS= read -r -d '' value; do
+        try_export_gateway_env_var "$key" "$value"
+      done < <(printf '%s' "$GW_ENV_VARS_RAW" | jq -j 'to_entries[] | .key, "\u0000", (.value | tostring), "\u0000"')
+    else
+      # Supported simple format: KEY=VALUE pairs separated by ';' or newlines.
+      echo "INFO: Setting gateway environment variables from KEY=VALUE string config..."
+      while IFS= read -r entry; do
+        entry="${entry%$'\r'}"
+        trimmed="$(printf '%s' "$entry" | sed -E 's/^[[:space:]]+//;s/[[:space:]]+$//')"
+
+        # Skip empty lines and comments.
+        if [ -z "$trimmed" ] || [[ "$trimmed" == \#* ]]; then
+          continue
+        fi
+
+        if [[ "$trimmed" != *"="* ]]; then
+          echo "WARN: Invalid gateway_env_vars entry '$trimmed' (expected KEY=VALUE, skip)"
+          continue
+        fi
+
+        key="${trimmed%%=*}"
+        value="${trimmed#*=}"
+        key="$(printf '%s' "$key" | sed -E 's/^[[:space:]]+//;s/[[:space:]]+$//')"
+
+        try_export_gateway_env_var "$key" "$value"
+      done < <(printf '%s' "$GW_ENV_VARS_RAW" | tr ';' '\n')
+    fi
+  fi
+
+  if [ $env_count -gt 0 ]; then
+    echo "INFO: Successfully exported $env_count gateway environment variable(s)"
+  fi
+elif [ "$GW_ENV_VARS_TYPE" != "null" ]; then
+  echo "WARN: Invalid gateway_env_vars format in add-on options (expected list, string or object), skipping"
+fi
+
 # ------------------------------------------------------------------------------
 # Persist Linuxbrew/Homebrew across Docker image rebuilds
 # Homebrew installs to /home/linuxbrew/.linuxbrew/ which is ephemeral.
diff --git a/openclaw_assistant/translations/bg.yaml b/openclaw_assistant/translations/bg.yaml
index 8882de8..03ea571 100644
--- a/openclaw_assistant/translations/bg.yaml
+++ b/openclaw_assistant/translations/bg.yaml
@@ -95,3 +95,6 @@ configuration:
     options:
       minimal: "Минимално (потискане на HA polling шум)"
       full: "Пълно (логване на всички заявки)"
+  gateway_env_vars:
+    name: Променливи на средата за Gateway
+    description: Променливи на средата, предавани на OpenClaw gateway процеса при стартиране (списък от записи name/value в Home Assistant UI; макс. 50 променливи, ключове до 255 знака, стойности до 10000 знака).
diff --git a/openclaw_assistant/translations/de.yaml b/openclaw_assistant/translations/de.yaml
index b18847f..49448ad 100644
--- a/openclaw_assistant/translations/de.yaml
+++ b/openclaw_assistant/translations/de.yaml
@@ -95,3 +95,6 @@ configuration:
     options:
       minimal: "Minimal (HA-Polling-Rauschen unterdrücken)"
       full: "Vollständig (alle Anfragen protokollieren)"
+  gateway_env_vars:
+    name: Gateway-Umgebungsvariablen
+    description: Umgebungsvariablen, die beim Start an den OpenClaw-Gateway-Prozess übergeben werden (Liste mit name/value-Einträgen in der Home Assistant UI; max. 50 Variablen, Schlüssel bis 255 Zeichen, Werte bis 10.000 Zeichen).
diff --git a/openclaw_assistant/translations/en.yaml b/openclaw_assistant/translations/en.yaml
index 5921841..cd2cd70 100644
--- a/openclaw_assistant/translations/en.yaml
+++ b/openclaw_assistant/translations/en.yaml
@@ -95,3 +95,6 @@ configuration:
     options:
       minimal: "Minimal (suppress HA polling noise)"
       full: "Full (log all requests)"
+  gateway_env_vars:
+    name: Gateway Environment Variables
+    description: Environment variables passed to the OpenClaw gateway process at startup (list entries with name/value in Home Assistant UI; max 50 variables, keys up to 255 characters, values up to 10,000 characters).
diff --git a/openclaw_assistant/translations/es.yaml b/openclaw_assistant/translations/es.yaml
index be7aa70..771716f 100644
--- a/openclaw_assistant/translations/es.yaml
+++ b/openclaw_assistant/translations/es.yaml
@@ -95,3 +95,6 @@ configuration:
     options:
       minimal: "Mínimo (suprimir ruido de polling HA)"
       full: "Completo (registrar todas las solicitudes)"
+  gateway_env_vars:
+    name: Variables de entorno del Gateway
+    description: Variables de entorno que se pasan al proceso del gateway OpenClaw al iniciarse (lista de entradas name/value en la UI de Home Assistant; maximo 50 variables, claves de hasta 255 caracteres, valores de hasta 10 000 caracteres).
diff --git a/openclaw_assistant/translations/pl.yaml b/openclaw_assistant/translations/pl.yaml
index e4db64a..d7dadf0 100644
--- a/openclaw_assistant/translations/pl.yaml
+++ b/openclaw_assistant/translations/pl.yaml
@@ -95,3 +95,6 @@ configuration:
     options:
       minimal: "Minimalny (pominięcie szumu polling HA)"
       full: "Pełny (logowanie wszystkich żądań)"
+  gateway_env_vars:
+    name: Zmienne środowiskowe gateway
+    description: Zmienne środowiskowe przekazywane do procesu gateway OpenClaw podczas uruchamiania (lista wpisow name/value w UI Home Assistant; maks. 50 zmiennych, klucze do 255 znakow, wartosci do 10000 znakow).
diff --git a/openclaw_assistant/translations/pt-BR.yaml b/openclaw_assistant/translations/pt-BR.yaml
index 9d28c79..8207da3 100644
--- a/openclaw_assistant/translations/pt-BR.yaml
+++ b/openclaw_assistant/translations/pt-BR.yaml
@@ -95,3 +95,6 @@ configuration:
     options:
       minimal: "Mínimo (suprimir ruído de polling HA)"
       full: "Completo (registrar todas as requisições)"
+  gateway_env_vars:
+    name: Variáveis de Ambiente do Gateway
+    description: Variaveis de ambiente passadas para o processo do gateway OpenClaw na inicializacao (lista de entradas name/value na UI do Home Assistant; maximo de 50 variaveis, chaves com ate 255 caracteres, valores com ate 10.000 caracteres).