diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca19b9b..80d5135 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to `@fundable/sdk` are documented here.
 
+## 0.2.1
+
+### Fixed
+
+- parse the Fundable backend's `{ status, data }` success envelope across wallet
+  authentication and sponsorship requests;
+- call the browser's native `fetch` with its required global receiver.
+
 ## 0.2.0
 
 Mainnet-readiness integration release.
diff --git a/package.json b/package.json
index e98afbd..f34f28c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@fundable/sdk",
-    "version": "0.2.0",
+    "version": "0.2.1",
     "private": false,
     "description": "Multichain TypeScript SDK for Fundable Protocol; Stellar adapter included",
     "license": "MIT",
diff --git a/src/stellar/sponsorship-client.test.ts b/src/stellar/sponsorship-client.test.ts
index 305823a..c32cfbc 100644
--- a/src/stellar/sponsorship-client.test.ts
+++ b/src/stellar/sponsorship-client.test.ts
@@ -9,19 +9,23 @@ function jsonResponse(body: object, status = 200): Response {
   });
 }
 
+function successfulResponse(data: object, status = 200): Response {
+  return jsonResponse({ status: true, data }, status);
+}
+
 describe("StellarSponsorshipClient", () => {
   it("authenticates a wallet and uses the bearer session for sponsorship", async () => {
     const fetcher = vi
       .fn<typeof fetch>()
       .mockResolvedValueOnce(
-        jsonResponse({
+        successfulResponse({
           challenge_id: "challenge-id",
           message: "Sign this Fundable challenge",
           expires_at: "2030-01-01T00:00:00.000Z",
         }),
       )
       .mockResolvedValueOnce(
-        jsonResponse({
+        successfulResponse({
           access_token: "session-token",
           token_type: "Bearer",
           expires_at: "2030-01-01T00:15:00.000Z",
@@ -29,7 +33,7 @@ describe("StellarSponsorshipClient", () => {
         }),
       )
       .mockResolvedValueOnce(
-        jsonResponse({
+        successfulResponse({
           fee_token: "CFEE",
           fee_in_token: "123",
           fee_in_token_ui: "0.0000123",
@@ -66,7 +70,7 @@ describe("StellarSponsorshipClient", () => {
     const fetcher = vi
       .fn<typeof fetch>()
       .mockResolvedValueOnce(
-        jsonResponse({
+        successfulResponse({
           transaction_xdr: "built-xdr",
           user_auth_entry: "auth-entry",
           fee_token: "CFEE",
@@ -79,7 +83,7 @@ describe("StellarSponsorshipClient", () => {
         }),
       )
       .mockResolvedValueOnce(
-        jsonResponse({
+        successfulResponse({
           intentId: "intent-1",
           submissionId: "submission-1",
           status: "pending",
@@ -121,6 +125,26 @@ describe("StellarSponsorshipClient", () => {
     );
   });
 
+  it("keeps compatibility with unwrapped successful responses", async () => {
+    const fetcher = vi.fn<typeof fetch>().mockResolvedValueOnce(
+      jsonResponse({
+        challenge_id: "challenge-id",
+        message: "Sign this Fundable challenge",
+        expires_at: "2030-01-01T00:00:00.000Z",
+      }),
+    );
+    const client = new StellarSponsorshipClient({
+      backendUrl: "https://api.example.com",
+      fetch: fetcher,
+    });
+
+    await expect(client.createChallenge("GACCOUNT", "TESTNET")).resolves.toEqual({
+      challengeId: "challenge-id",
+      message: "Sign this Fundable challenge",
+      expiresAt: "2030-01-01T00:00:00.000Z",
+    });
+  });
+
   it("rejects expired builds before calling the backend", async () => {
     const fetcher = vi.fn<typeof fetch>();
     const client = new StellarSponsorshipClient({
diff --git a/src/stellar/sponsorship-client.ts b/src/stellar/sponsorship-client.ts
index 14dd5cf..a471b9e 100644
--- a/src/stellar/sponsorship-client.ts
+++ b/src/stellar/sponsorship-client.ts
@@ -142,6 +142,13 @@ function optionalString(value: unknown): string | null {
   return typeof value === "string" && value.trim() ? value : null;
 }
 
+function unwrapResponseData(payload: Record<string, any>): Record<string, any> {
+  const data = payload.data;
+  return payload.status === true && data !== null && typeof data === "object" && !Array.isArray(data)
+    ? data
+    : payload;
+}
+
 export class StellarSponsorshipClient {
   private readonly fetcher: typeof fetch;
   private readonly backendUrl: string;
@@ -159,7 +166,7 @@ export class StellarSponsorshipClient {
     this.backendUrl = config.backendUrl.replace(/\/$/, "");
     this.accessToken = config.accessToken;
     this.headers = config.headers ?? {};
-    this.fetcher = config.fetch ?? fetch;
+    this.fetcher = config.fetch ?? ((input, init) => globalThis.fetch(input, init));
   }
 
   setAccessToken(accessToken: string | undefined): void {
@@ -331,6 +338,6 @@ export class StellarSponsorshipClient {
         chain: "stellar",
       });
     }
-    return payload;
+    return unwrapResponseData(payload);
   }
 }