diff --git a/threepid/api.go b/threepid/api.go
deleted file mode 100644
index 6731d7a4d..000000000
--- a/threepid/api.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package threepid
-
-import "context"
-
-type API interface {
-	CreateSession(context.Context, *CreateSessionRequest, *Session) error
-	ValidateSession(context.Context, *ValidateSessionRequest, struct{}) error
-	GetThreePidForSession(context.Context, *SessionOwnership, *GetThreePidForSessionResponse) error
-	DeleteSession(context.Context, *SessionOwnership, struct{}) error
-	IsSessionValidated(context.Context, *SessionOwnership, *IsSessionValidatedResponse) error
-}
-
-type CreateSessionRequest struct {
-	ClientSecret, NextLink, ThreePid string
-}
-
-type ValidateSessionRequest struct {
-	SessionOwnership
-	Token string
-}
-
-type GetThreePidForSessionResponse struct {
-	ThreePid string
-}
-
-type SessionOwnership struct {
-	Sid, ClientSecret string
-}
-
-type Session struct {
-	Sid, ClientSecret, ThreePid, Token, NextLink string
-	SendAttempt                                  int
-}
-
-type IsSessionValidatedResponse struct {
-	Validated   bool
-	ValidatedAt int
-}
diff --git a/userapi/api/api.go b/userapi/api/api.go
index 407350123..e976f0139 100644
--- a/userapi/api/api.go
+++ b/userapi/api/api.go
@@ -40,6 +40,11 @@ type UserInternalAPI interface {
 	QueryDeviceInfos(ctx context.Context, req *QueryDeviceInfosRequest, res *QueryDeviceInfosResponse) error
 	QuerySearchProfiles(ctx context.Context, req *QuerySearchProfilesRequest, res *QuerySearchProfilesResponse) error
 	QueryOpenIDToken(ctx context.Context, req *QueryOpenIDTokenRequest, res *QueryOpenIDTokenResponse) error
+	CreateSession(context.Context, *CreateSessionRequest, *Session) error
+	ValidateSession(context.Context, *ValidateSessionRequest, struct{}) error
+	GetThreePidForSession(context.Context, *SessionOwnership, *GetThreePidForSessionResponse) error
+	DeleteSession(context.Context, *SessionOwnership, struct{}) error
+	IsSessionValidated(context.Context, *SessionOwnership, *IsSessionValidatedResponse) error
 }
 
 // InputAccountDataRequest is the request for InputAccountData
@@ -332,3 +337,31 @@ const (
 	// AccountTypeGuest indicates this is a guest account
 	AccountTypeGuest AccountType = 2
 )
+
+type CreateSessionRequest struct {
+	ClientSecret, NextLink, ThreePid string
+}
+
+type ValidateSessionRequest struct {
+	SessionOwnership
+	Token string
+}
+
+type GetThreePidForSessionResponse struct {
+	ThreePid string
+}
+
+type SessionOwnership struct {
+	Sid, ClientSecret string
+}
+
+type Session struct {
+	Sid, ClientSecret, ThreePid, Token, NextLink string
+	SendAttempt, ValidatedAt                     int
+	Validated                                    bool
+}
+
+type IsSessionValidatedResponse struct {
+	Validated   bool
+	ValidatedAt int
+}