diff --git a/src/Lib.ts b/src/Lib.ts
index 884ae69..db6fd64 100644
--- a/src/Lib.ts
+++ b/src/Lib.ts
@@ -593,6 +593,108 @@ export class Lib {
     this.cachedData = null
   }
 
+  /**
+   * Gets the anonymous profile ID for the current visitor.
+   * If profileId was set via init options, returns that.
+   * Otherwise, requests server to generate one from IP/UA hash.
+   *
+   * This ID can be used for revenue attribution with payment providers.
+   *
+   * @returns A promise that resolves to the profile ID string, or null on error.
+   *
+   * @example
+   * ```typescript
+   * const profileId = await swetrix.getProfileId()
+   *
+   * // Pass to Paddle Checkout for revenue attribution
+   * Paddle.Checkout.open({
+   *   items: [{ priceId: 'pri_01234567890', quantity: 1 }],
+   *   customData: {
+   *     swetrix_profile_id: profileId,
+   *     swetrix_session_id: await swetrix.getSessionId()
+   *   }
+   * })
+   * ```
+   */
+  async getProfileId(): Promise<string | null> {
+    // If profileId is already set in options, return it
+    if (this.options?.profileId) {
+      return this.options.profileId
+    }
+
+    if (!isInBrowser()) {
+      return null
+    }
+
+    try {
+      const apiBase = this.getApiBase()
+      const response = await fetch(`${apiBase}/log/profile-id`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ pid: this.projectID }),
+      })
+
+      if (!response.ok) {
+        return null
+      }
+
+      const data = (await response.json()) as { profileId: string | null }
+      return data.profileId
+    } catch {
+      return null
+    }
+  }
+
+  /**
+   * Gets the current session ID for the visitor.
+   * Session IDs are generated server-side based on IP and user agent.
+   *
+   * This ID can be used for revenue attribution with payment providers.
+   *
+   * @returns A promise that resolves to the session ID string, or null on error.
+   *
+   * @example
+   * ```typescript
+   * const sessionId = await swetrix.getSessionId()
+   *
+   * // Pass to Paddle Checkout for revenue attribution
+   * Paddle.Checkout.open({
+   *   items: [{ priceId: 'pri_01234567890', quantity: 1 }],
+   *   customData: {
+   *     swetrix_profile_id: await swetrix.getProfileId(),
+   *     swetrix_session_id: sessionId
+   *   }
+   * })
+   * ```
+   */
+  async getSessionId(): Promise<string | null> {
+    if (!isInBrowser()) {
+      return null
+    }
+
+    try {
+      const apiBase = this.getApiBase()
+      const response = await fetch(`${apiBase}/log/session-id`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ pid: this.projectID }),
+      })
+
+      if (!response.ok) {
+        return null
+      }
+
+      const data = (await response.json()) as { sessionId: string | null }
+      return data.sessionId
+    } catch {
+      return null
+    }
+  }
+
   /**
    * Gets the API base URL (without /log suffix).
    */
diff --git a/src/index.ts b/src/index.ts
index b45f0b9..1b5c195 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -263,6 +263,63 @@ export function clearExperimentsCache(): void {
   LIB_INSTANCE.clearExperimentsCache()
 }
 
+/**
+ * Gets the anonymous profile ID for the current visitor.
+ * If profileId was set via init options, returns that.
+ * Otherwise, requests server to generate one from IP/UA hash.
+ *
+ * This ID can be used for revenue attribution with payment providers like Paddle.
+ *
+ * @returns A promise that resolves to the profile ID string, or null on error.
+ *
+ * @example
+ * ```typescript
+ * const profileId = await getProfileId()
+ *
+ * // Pass to Paddle Checkout for revenue attribution
+ * Paddle.Checkout.open({
+ *   items: [{ priceId: 'pri_01234567890', quantity: 1 }],
+ *   customData: {
+ *     swetrix_profile_id: profileId,
+ *     swetrix_session_id: await getSessionId()
+ *   }
+ * })
+ * ```
+ */
+export async function getProfileId(): Promise<string | null> {
+  if (!LIB_INSTANCE) return null
+
+  return LIB_INSTANCE.getProfileId()
+}
+
+/**
+ * Gets the current session ID for the visitor.
+ * Session IDs are generated server-side based on IP and user agent.
+ *
+ * This ID can be used for revenue attribution with payment providers like Paddle.
+ *
+ * @returns A promise that resolves to the session ID string, or null on error.
+ *
+ * @example
+ * ```typescript
+ * const sessionId = await getSessionId()
+ *
+ * // Pass to Paddle Checkout for revenue attribution
+ * Paddle.Checkout.open({
+ *   items: [{ priceId: 'pri_01234567890', quantity: 1 }],
+ *   customData: {
+ *     swetrix_profile_id: await getProfileId(),
+ *     swetrix_session_id: sessionId
+ *   }
+ * })
+ * ```
+ */
+export async function getSessionId(): Promise<string | null> {
+  if (!LIB_INSTANCE) return null
+
+  return LIB_INSTANCE.getSessionId()
+}
+
 export {
   LibOptions,
   TrackEventOptions,