diff --git a/runtime/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/KeyValueParameter.java b/runtime/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/KeyValueParameter.java
index 173d9e2..a5924b4 100644
--- a/runtime/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/KeyValueParameter.java
+++ b/runtime/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/KeyValueParameter.java
@@ -8,18 +8,29 @@
 import javax.json.JsonValue;
 
 /**
- * A simple single key--value pair forming a {@link StructuredParameter}.
+ * A simple single key–value pair forming a {@link StructuredParameter}.
  *
- * <p>This class is suitable for the common case of logging a key—value pair as parameter to the
+ * <p>This class is suitable for the common case of logging a key–value pair as parameter to the
  * {@code *f} family of logging functions on {@link org.jboss.logging.Logger}. For advanced use
  * cases, provide your own implementation of {@link StructuredParameter}.
  *
- * <p>Example:
+ * <p><strong>Example:</strong>
  *
  * <pre>{@code
  * logger.infof("Application starting.", StructuredParameter.of("version", "1.0"));
  * }</pre>
  *
+ * Result:
+ *
+ * <pre>{@code
+ * {
+ *   "jsonPayload": {
+ *     "message": "Application starting.",
+ *     "version": "1.0"
+ *   }
+ * }
+ * }</pre>
+ *
  * @see Label
  * @see StructuredParameter
  */
@@ -33,30 +44,93 @@
     this.value = value;
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from a {@link String} value.
+   *
+   * <p>The resulting JSON value is of type {@code string}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, String value) {
     return new KeyValueParameter(key, Json.createValue(value));
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from an {@code int} value.
+   *
+   * <p>The resulting JSON value is of type {@code number}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, int value) {
     return new KeyValueParameter(key, Json.createValue(value));
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from a {@code long} value.
+   *
+   * <p>The resulting JSON value is of type {@code number}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, long value) {
     return new KeyValueParameter(key, Json.createValue(value));
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from a {@code double} value.
+   *
+   * <p>The resulting JSON value is of type {@code number}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, double value) {
     return new KeyValueParameter(key, Json.createValue(value));
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from a {@link BigDecimal} value.
+   *
+   * <p>The resulting JSON value is of type {@code number}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, BigDecimal value) {
     return new KeyValueParameter(key, Json.createValue(value));
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from a {@link BigInteger} value.
+   *
+   * <p>The resulting JSON value is of type {@code number}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, BigInteger value) {
     return new KeyValueParameter(key, Json.createValue(value));
   }
 
+  /**
+   * Creates a {@link KeyValueParameter} from a {@code boolean} value.
+   *
+   * <p>The resulting JSON value is of type {@code boolean}.
+   *
+   * @param key the key part of the key–value pair.
+   * @param value the value part of the key–value pair.
+   * @return the newly constructed parameter, ready to be passed to a logging function.
+   */
   public static KeyValueParameter of(String key, boolean value) {
     return new KeyValueParameter(key, value ? JsonValue.TRUE : JsonValue.FALSE);
   }
@@ -66,10 +140,23 @@
     return Json.createObjectBuilder().add(key, value);
   }
 
+  /**
+   * The key part of the key–value pair.
+   *
+   * @return the key part of the key–value pair.
+   */
   public String key() {
     return key;
   }
 
+  /**
+   * The value part of the key–value pair.
+   *
+   * <p>Can be of any non-composite JSON type (i.e. {@code string}, {@code number}, or {@code
+   * boolean}).
+   *
+   * @return the value pairt of the key–value pair.
+   */
   public JsonValue value() {
     return value;
   }