diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3adced922c6..941e1421f4f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,4 @@
+* Adding Masterpass support to `STPSourceParams` [#928](https://github.com/stripe/stripe-ios/pull/928)
 * Silence STPAddress deprecation warnings we ignore to stay compatible with older iOS versions
 * Fix "Card IO" link in full SDK reference https://github.com/stripe/stripe-ios/pull/913
 
diff --git a/Stripe/PublicHeaders/STPSourceParams.h b/Stripe/PublicHeaders/STPSourceParams.h
index ebacb068daa..351d10ce267 100644
--- a/Stripe/PublicHeaders/STPSourceParams.h
+++ b/Stripe/PublicHeaders/STPSourceParams.h
@@ -289,6 +289,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 /**
  Creates params for a card source created from Visa Checkout.
+ @see https://stripe.com/docs/visa-checkout
 
  @note Creating an STPSource with these params will give you a
  source with type == STPSourceTypeCard
@@ -298,6 +299,21 @@ NS_ASSUME_NONNULL_BEGIN
  */
 + (STPSourceParams *)visaCheckoutParamsWithCallId:(NSString *)callId;
 
+
+/**
+ Creates params for a card source created from Masterpass.
+ @see https://stripe.com/docs/masterpass
+
+ @note Creating an STPSource with these params will give you a
+ source with type == STPSourceTypeCard
+
+ @param cartId The cartId from a `MCCCheckoutResponse` object.
+ @param transactionId The transactionid from a `MCCCheckoutResponse` object.
+ @return An STPSourceParams object populated with the provided values.
+ */
++ (STPSourceParams *)masterpassParamsWithCartId:(NSString *)cartId
+                                  transactionId:(NSString *)transactionId;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/Stripe/STPSourceParams.m b/Stripe/STPSourceParams.m
index 81c662084cb..7c291f1c8e0 100644
--- a/Stripe/STPSourceParams.m
+++ b/Stripe/STPSourceParams.m
@@ -308,6 +308,21 @@ + (STPSourceParams *)visaCheckoutParamsWithCallId:(NSString *)callId {
     return params;
 }
 
++ (STPSourceParams *)masterpassParamsWithCartId:(NSString *)cartId
+                                  transactionId:(NSString *)transactionId {
+    STPSourceParams *params = [self new];
+    params.type = STPSourceTypeCard;
+    params.additionalAPIParameters = @{ @"card": @{
+                                                @"masterpass": @{
+                                                        @"cart_id": cartId,
+                                                        @"transaction_id": transactionId,
+                                                        }
+                                                }
+
+                                        };
+    return params;
+}
+
 #pragma mark - Redirect Dictionary
 
 /**
diff --git a/Tests/Tests/STPSourceFunctionalTest.m b/Tests/Tests/STPSourceFunctionalTest.m
index 21c347aa3b6..0e93db41afb 100644
--- a/Tests/Tests/STPSourceFunctionalTest.m
+++ b/Tests/Tests/STPSourceFunctionalTest.m
@@ -16,6 +16,10 @@ @interface STPSourceFunctionalTest : XCTestCase
 
 @end
 
+@interface STPAPIClient (WritableURL)
+@property (nonatomic, readwrite) NSURL *apiURL;
+@end
+
 @implementation STPSourceFunctionalTest
 
 - (void)testCreateSource_bancontact {
@@ -295,6 +299,58 @@ - (void)testCreateSource_threeDSecure {
     [self waitForExpectationsWithTimeout:5.0f handler:nil];
 }
 
+- (void)skip_testCreateSourceVisaCheckout {
+    // The SDK does not have a means of generating Visa Checkout params for testing. Supply your own
+    // callId, and the correct publishable key, and you can run this test case
+    // manually after removing the `skip_` prefix. It'll log the source's stripeID, and that
+    // can be verified in dashboard.
+    STPSourceParams *params = [STPSourceParams visaCheckoutParamsWithCallId:@""];
+    STPAPIClient *client = [[STPAPIClient alloc] initWithPublishableKey:@"pk_"];
+    client.apiURL = [NSURL URLWithString:@"https://api.stripe.com/v1"];
+
+    XCTestExpectation *sourceExp = [self expectationWithDescription:@"VCO source created"];
+    [client createSourceWithParams:params completion:^(STPSource * _Nullable source, NSError * _Nullable error) {
+        [sourceExp fulfill];
+
+        XCTAssertNil(error);
+        XCTAssertNotNil(source);
+        XCTAssertEqual(source.type, STPSourceTypeCard);
+        XCTAssertEqual(source.flow, STPSourceFlowNone);
+        XCTAssertEqual(source.status, STPSourceStatusChargeable);
+        XCTAssertEqual(source.usage, STPSourceUsageReusable);
+        XCTAssertTrue([source.stripeID hasPrefix:@"src_"]);
+        NSLog(@"Created a VCO source %@", source.stripeID);
+    }];
+
+    [self waitForExpectationsWithTimeout:10.0 handler:nil];
+}
+
+- (void)skip_testCreateSourceMasterpass {
+    // The SDK does not have a means of generating Masterpass params for testing. Supply your own
+    // cartId & transactionId, and the correct publishable key, and you can run this test case
+    // manually after removing the `skip_` prefix. It'll log the source's stripeID, and that
+    // can be verified in dashboard.
+    STPSourceParams *params = [STPSourceParams masterpassParamsWithCartId:@"" transactionId:@""];
+    STPAPIClient *client = [[STPAPIClient alloc] initWithPublishableKey:@"pk_"];
+    client.apiURL = [NSURL URLWithString:@"https://api.stripe.com/v1"];
+
+    XCTestExpectation *sourceExp = [self expectationWithDescription:@"Masterpass source created"];
+    [client createSourceWithParams:params completion:^(STPSource * _Nullable source, NSError * _Nullable error) {
+        [sourceExp fulfill];
+
+        XCTAssertNil(error);
+        XCTAssertNotNil(source);
+        XCTAssertEqual(source.type, STPSourceTypeCard);
+        XCTAssertEqual(source.flow, STPSourceFlowNone);
+        XCTAssertEqual(source.status, STPSourceStatusChargeable);
+        XCTAssertEqual(source.usage, STPSourceUsageSingleUse);
+        XCTAssertTrue([source.stripeID hasPrefix:@"src_"]);
+        NSLog(@"Created a Masterpass source %@", source.stripeID);
+    }];
+
+    [self waitForExpectationsWithTimeout:10.0 handler:nil];
+}
+
 - (void)testCreateSource_alipay {
     STPSourceParams *params = [STPSourceParams alipayParamsWithAmount:1099
                                                              currency:@"usd"
diff --git a/Tests/Tests/STPSourceParamsTest.m b/Tests/Tests/STPSourceParamsTest.m
index c3db45a3281..73c8008e44a 100644
--- a/Tests/Tests/STPSourceParamsTest.m
+++ b/Tests/Tests/STPSourceParamsTest.m
@@ -203,6 +203,30 @@ - (void)testCardParamsWithCard {
     XCTAssertEqualObjects(sourceAddress[@"country"], card.address.country);
 }
 
+- (void)testParamsWithVisaCheckout {
+    STPSourceParams *params = [STPSourceParams visaCheckoutParamsWithCallId:@"12345678"];
+
+    XCTAssertEqual(params.type, STPSourceTypeCard);
+    NSDictionary *sourceCard = params.additionalAPIParameters[@"card"];
+    XCTAssertNotNil(sourceCard);
+    NSDictionary *sourceVisaCheckout = sourceCard[@"visa_checkout"];
+    XCTAssertNotNil(sourceVisaCheckout);
+    XCTAssertEqualObjects(sourceVisaCheckout[@"callid"], @"12345678");
+}
+
+- (void)testParamsWithMasterPass {
+    STPSourceParams *params = [STPSourceParams masterpassParamsWithCartId:@"12345678"
+                                                            transactionId:@"87654321"];
+
+    XCTAssertEqual(params.type, STPSourceTypeCard);
+    NSDictionary *sourceCard = params.additionalAPIParameters[@"card"];
+    XCTAssertNotNil(sourceCard);
+    NSDictionary *sourceMasterpass = sourceCard[@"masterpass"];
+    XCTAssertNotNil(sourceMasterpass);
+    XCTAssertEqualObjects(sourceMasterpass[@"cart_id"], @"12345678");
+    XCTAssertEqualObjects(sourceMasterpass[@"transaction_id"], @"87654321");
+}
+
 
 #pragma mark - Redirect Dictionary Tests