diff --git a/api/ecobee.php b/api/ecobee.php
index 70bb36f..787eff5 100644
--- a/api/ecobee.php
+++ b/api/ecobee.php
@@ -18,6 +18,8 @@ class ecobee extends external_api {
   protected static $log_influx = true;
   protected static $log_mysql = 'error';
 
+  protected static $influx_retention_policy = '30d';
+
   protected static $cache = false;
   protected static $cache_for = null;
 
diff --git a/api/external_api.php b/api/external_api.php
index 626e760..adca8eb 100644
--- a/api/external_api.php
+++ b/api/external_api.php
@@ -22,6 +22,12 @@ class external_api extends cora\api {
    */
   protected static $log_mysql = 'error';
 
+  /**
+   * Default retention policy when inserting data. Autogen is the default
+   * infinite one; also available is 30d.
+   */
+  protected static $influx_retention_policy = 'autogen';
+
   /**
    * Whether or not to cache API calls. This will store a hash of the request
    * and the response in the database and check there before performing the
@@ -230,7 +236,8 @@ class external_api extends cora\api {
           'http_code' => (int) $this->curl_info['http_code'],
           'connect_time' => round($this->curl_info['connect_time'], 4)
         ],
-        'timestamp' => $this->request_timestamp_microtime
+        'timestamp' => $this->request_timestamp_microtime,
+        'retention_policy' => $this::$influx_retention_policy
       ]
     );
   }
diff --git a/api/logger.php b/api/logger.php
index e2ac85e..ca84fb0 100644
--- a/api/logger.php
+++ b/api/logger.php
@@ -17,8 +17,10 @@ class logger extends cora\api {
    * Use these for things that need where clauses outside of timestamp.
    * @param array $fields At least one field. These are not indexed.
    * @param string $timestamp The timestamp in microseconds.
+   * @param string $retention_policy The retention policy to write to.
+   * Defaults to "autogen" which is infinite.
    */
-  public function log_influx($measurement, $tags, $fields, $timestamp) {
+  public function log_influx($measurement, $tags, $fields, $timestamp, $retention_policy = null) {
     // If this is not configured, do not log.
     if(
       $this->setting->get('influx_database_host') === null ||
@@ -46,6 +48,7 @@ class logger extends cora\api {
       $this->setting->get('influx_database_port') .
       '/write' .
       '?db=' . $this->setting->get('influx_database_name') .
+      ($retention_policy !== null ? ('&rp=' . $retention_policy) : '') .
       '&precision=u';
 
     exec(