diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1ba9430..188e7ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -81,6 +81,14 @@ set(RETURN_ON_DEL_VAL false)
 set(RETURN_ON_DEL_NAME_VAL "\"\"")
 endif()
 
+if(DEFINED API_VERSION)
+set(RETURN_ON_DEL_VAL true)
+set(RETURN_ON_DEL_NAME_VAL API_VERSION)
+else()
+set(RETURN_ON_DEL_VAL false)
+set(RETURN_ON_DEL_NAME_VAL 2)
+endif()
+
 configure_file(ccash_config.hpp.in ${CMAKE_CURRENT_SOURCE_DIR}/include/ccash_config.hpp)
 
 target_include_directories(${PROJECT_NAME} PUBLIC include)
diff --git a/ccash_config.hpp.in b/ccash_config.hpp.in
index 9e58e4d..99a9967 100644
--- a/ccash_config.hpp.in
+++ b/ccash_config.hpp.in
@@ -35,7 +35,7 @@ version 2 will work
 version 3 will not work
 etc
 */
-#define API_VERSION 2
+#define API_VERSION @API_VERSION@
 
 #define MULTI_THREADED @MULTI_THREADED_VAL@
 
diff --git a/docs/building.md b/docs/building.md
index f374124..c8d2c66 100644
--- a/docs/building.md
+++ b/docs/building.md
@@ -66,16 +66,16 @@ cd build
 
 ### CMake Flags
 there are multiple flags responsible configuring CCash:
-| name                   |    default    | description                                                                                                                                             | pros                             | cons                                                     |
-| :--------------------- | :-----------: | ------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------- | -------------------------------------------------------- |
-| USER_SAVE_LOC          |  "users.dat"  | where the users are saved                                                                                                                               | `N/A`                            | `N/A`                                                    |
-| DROGON_CONFIG_LOC      | "config.json" | where the config is located                                                                                                                             | `N/A`                            | `N/A`                                                    |
-| MAX_LOG_SIZE           |      100      | max number of logs per user, last `n` transactions. If both this and pre log are toggled to 0 logs will not be compiled.                                | large history                    | higher memory usage                                      |
-| CONSERVATIVE_DISK_SAVE |    `true`     | when `true` only saves when changes are made                                                                                                            | low # of disk operations         | some atomic overhead                                     |
-| MULTI_THREADED         |    `true`     | when `true` the program is compiled to utilize `n` threads which corresponds to how many Cores your CPU has, plus 1 for saving                          | speed                            | memory lock overhead is wasteful on single core machines |
-| RETURN_ON_DEL_NAME     |     `N/A`     | when defined, return on delete will be toggled and any accounts deleted will send their funds to the defined account, this prevent currency destruction | prevents destruction of currency | deleting accounts is made slower                         |
-| ADD_USER_OPEN          |    `true`     | anybody can make a new account, if set to false only admins can add accounts via `AdminAddUser()`                                                       | `N/A`                            | spamming new users                                       |
-
+| name                   |       default        | description                                                                                                                                                               | pros                             | cons                                                     |
+| :--------------------- | :------------------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------- | -------------------------------------------------------- |
+| USER_SAVE_LOC          |  "config/users.dat"  | where the users are saved                                                                                                                                                 | `N/A`                            | `N/A`                                                    |
+| DROGON_CONFIG_LOC      | "config/config.json" | where the config is located                                                                                                                                               | `N/A`                            | `N/A`                                                    |
+| MAX_LOG_SIZE           |         100          | max number of logs per user, last `n` transactions. If both this and pre log are toggled to 0 logs will not be compiled.                                                  | large history                    | higher memory usage                                      |
+| CONSERVATIVE_DISK_SAVE |        `true`        | when `true` only saves when changes are made                                                                                                                              | low # of disk operations         | some atomic overhead                                     |
+| MULTI_THREADED         |        `true`        | when `true` the program is compiled to utilize `n` threads which corresponds to how many Cores your CPU has, plus 1 for saving                                            | speed                            | memory lock overhead is wasteful on single core machines |
+| RETURN_ON_DEL_NAME     |        `N/A`         | when defined, return on delete will be toggled and any accounts deleted will send their funds to the defined account, this prevent currency destruction                   | prevents destruction of currency | deleting accounts is made slower                         |
+| ADD_USER_OPEN          |        `true`        | anybody can make a new account, if set to false only admins can add accounts via `AdminAddUser()`                                                                         | `N/A`                            | spamming new users                                       |
+| API_VERSION            |          2           | api versions are backwards compatible, e.g if set to 2, v1 and v2 api endpoints will be compiled, but v3 would not. By default `API_VERSION` is set to the newest version | `N/A`                            | `N/A`                                                    |
 
 EXAMPLE:
 ```