diff --git a/keyboards/custommk/cmk11/config.h b/keyboards/custommk/cmk11/config.h
new file mode 100644
index 0000000000..122d32c5da
--- /dev/null
+++ b/keyboards/custommk/cmk11/config.h
@@ -0,0 +1,29 @@
+// Copyright 2024 customMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+// FRAM configuration
+#define EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN B7
+#define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 4 // 48MHz / 4 = 12MHz; max supported by MB85R64 is 20MHz
+
+// SPI configuration
+#define SPI_DRIVER SPID1
+#define SPI_SCK_PIN B3
+#define SPI_MOSI_PIN B5
+#define SPI_MISO_PIN B4
+
+// Audio configuration
+#define AUDIO_PIN B8
+#define AUDIO_PWM_DRIVER PWMD4
+#define AUDIO_PWM_CHANNEL 3 
+#define AUDIO_PWM_PAL_MODE 2
+#define AUDIO_STATE_TIMER GPTD5
+#define AUDIO_INIT_DELAY
+
+// WS2812 configuration
+#define WS2812_PWM_DRIVER PWMD1
+#define WS2812_PWM_CHANNEL 3
+#define WS2812_PWM_PAL_MODE 1
+#define WS2812_DMA_STREAM STM32_DMA2_STREAM5
+#define WS2812_DMA_CHANNEL 6
diff --git a/keyboards/custommk/cmk11/halconf.h b/keyboards/custommk/cmk11/halconf.h
new file mode 100644
index 0000000000..6791d829f9
--- /dev/null
+++ b/keyboards/custommk/cmk11/halconf.h
@@ -0,0 +1,30 @@
+/* Copyright 2024 customMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define HAL_USE_PWM TRUE
+
+#define HAL_USE_SPI TRUE
+
+#define SPI_SELECT_MODE SPI_SELECT_MODE_PAD
+
+#define SERIAL_BUFFERS_SIZE 256
+
+// This enables interrupt-driven mode
+#define SPI_USE_WAIT TRUE
+
+#include_next <halconf.h>
diff --git a/keyboards/custommk/cmk11/info.json b/keyboards/custommk/cmk11/info.json
new file mode 100644
index 0000000000..d831351aa7
--- /dev/null
+++ b/keyboards/custommk/cmk11/info.json
@@ -0,0 +1,121 @@
+{
+    "manufacturer": "customMK",
+    "keyboard_name": "CMK11",
+    "maintainer": "customMK",
+    "bootloader": "stm32-dfu",
+    "diode_direction": "ROW2COL",
+    "dynamic_keymap": {
+        "layer_count": 32
+    },
+    "eeprom": {
+        "driver": "spi"
+    },
+    "features": {
+        "audio": true,
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true,
+        "rgb_matrix": true
+    },
+    "matrix_pins": {
+        "cols": ["B0", "A1", "A2", "A3", "A6", "B10"],
+        "rows": ["A5", "A4"]
+    },
+    "processor": "STM32F411",
+    "qmk": {
+        "tap_keycode_delay": 10
+    },
+    "rgb_matrix": {
+        "animations": {
+            "alphas_mods": true,
+            "band_pinwheel_sat": true,
+            "band_pinwheel_val": true,
+            "band_sat": true,
+            "band_spiral_sat": true,
+            "band_spiral_val": true,
+            "band_val": true,
+            "breathing": true,
+            "cycle_all": true,
+            "cycle_left_right": true,
+            "cycle_out_in": true,
+            "cycle_out_in_dual": true,
+            "cycle_pinwheel": true,
+            "cycle_spiral": true,
+            "cycle_up_down": true,
+            "digital_rain": true,
+            "dual_beacon": true,
+            "gradient_left_right": true,
+            "gradient_up_down": true,
+            "hue_breathing": true,
+            "hue_pendulum": true,
+            "hue_wave": true,
+            "jellybean_raindrops": true,
+            "multisplash": true,
+            "pixel_flow": true,
+            "pixel_fractal": true,
+            "pixel_rain": true,
+            "rainbow_beacon": true,
+            "rainbow_moving_chevron": true,
+            "rainbow_pinwheels": true,
+            "raindrops": true,
+            "solid_multisplash": true,
+            "solid_reactive": true,
+            "solid_reactive_cross": true,
+            "solid_reactive_multicross": true,
+            "solid_reactive_multinexus": true,
+            "solid_reactive_multiwide": true,
+            "solid_reactive_nexus": true,
+            "solid_reactive_simple": true,
+            "solid_reactive_wide": true,
+            "solid_splash": true,
+            "splash": true,
+            "typing_heatmap": true
+        },
+        "driver": "ws2812",
+        "layout": [
+            {"matrix": [0, 0], "x": 0, "y": 0, "flags": 4},
+            {"matrix": [0, 1], "x": 45, "y": 0, "flags": 4},
+            {"matrix": [0, 2], "x": 90, "y": 0, "flags": 4},
+            {"matrix": [0, 3], "x": 134, "y": 0, "flags": 4},
+            {"matrix": [0, 4], "x": 179, "y": 0, "flags": 4},
+            {"matrix": [0, 5], "x": 224, "y": 0, "flags": 4},
+            {"matrix": [1, 0], "x": 23, "y": 64, "flags": 4},
+            {"matrix": [1, 1], "x": 68, "y": 64, "flags": 4},
+            {"matrix": [1, 2], "x": 112, "y": 64, "flags": 4},
+            {"matrix": [1, 3], "x": 157, "y": 64, "flags": 4},
+            {"matrix": [1, 4], "x": 202, "y": 64, "flags": 4}
+        ],
+        "max_brightness": 120,
+        "sat_steps": 8,
+        "speed_steps": 10,
+        "val_steps": 8
+    },
+    "url": "https://shop.custommk.com/collections/cmk11/products/ckm11",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0xFABA",
+        "vid": "0xF35B"
+    },
+    "ws2812": {
+        "driver": "pwm",
+        "pin": "A10"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0},
+                {"matrix": [0, 4], "x": 4, "y": 0},
+                {"matrix": [0, 5], "x": 5, "y": 0},
+                {"matrix": [1, 0], "x": 0.5, "y": 1},
+                {"matrix": [1, 1], "x": 1.5, "y": 1},
+                {"matrix": [1, 2], "x": 2.5, "y": 1},
+                {"matrix": [1, 3], "x": 3.5, "y": 1},
+                {"matrix": [1, 4], "x": 4.5, "y": 1}
+            ]
+        }
+    }
+}
\ No newline at end of file
diff --git a/keyboards/custommk/cmk11/keymaps/default/keymap.c b/keyboards/custommk/cmk11/keymaps/default/keymap.c
new file mode 100644
index 0000000000..a6d6db48c9
--- /dev/null
+++ b/keyboards/custommk/cmk11/keymaps/default/keymap.c
@@ -0,0 +1,11 @@
+// Copyright 2024 customMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT(
+        KC_ESC,  KC_C,    KC_V,   KC_VOLU, KC_VOLD, KC_DEL,
+        KC_LCTL, KC_PGUP, KC_SPC, KC_PGDN, KC_ENT
+    )
+};
diff --git a/keyboards/custommk/cmk11/keymaps/via/config.h b/keyboards/custommk/cmk11/keymaps/via/config.h
new file mode 100644
index 0000000000..c2dca38277
--- /dev/null
+++ b/keyboards/custommk/cmk11/keymaps/via/config.h
@@ -0,0 +1,6 @@
+// Copyright 2024 customMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define DYNAMIC_KEYMAP_MACRO_COUNT 128
diff --git a/keyboards/custommk/cmk11/keymaps/via/keymap.c b/keyboards/custommk/cmk11/keymaps/via/keymap.c
new file mode 100644
index 0000000000..a4ee324f3f
--- /dev/null
+++ b/keyboards/custommk/cmk11/keymaps/via/keymap.c
@@ -0,0 +1,11 @@
+// Copyright 2024 customMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT(
+        KC_ESC,  KC_C,    KC_V,   KC_VOLU, KC_VOLD, KC_DEL,
+        KC_LCTL, KC_PGUP, KC_SPC, KC_PGDN, MO(1)
+    )
+};
diff --git a/keyboards/custommk/cmk11/keymaps/via/rules.mk b/keyboards/custommk/cmk11/keymaps/via/rules.mk
new file mode 100644
index 0000000000..036bd6d1c3
--- /dev/null
+++ b/keyboards/custommk/cmk11/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/custommk/cmk11/mcuconf.h b/keyboards/custommk/cmk11/mcuconf.h
new file mode 100644
index 0000000000..8151abdcba
--- /dev/null
+++ b/keyboards/custommk/cmk11/mcuconf.h
@@ -0,0 +1,31 @@
+/* Copyright 2024 customMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include_next <mcuconf.h>
+
+// Used for audio
+#undef STM32_PWM_USE_TIM4
+#define STM32_PWM_USE_TIM4 TRUE
+
+// Used for FRAM
+#undef STM32_SPI_USE_SPI1
+#define STM32_SPI_USE_SPI1 TRUE
+
+// Used for RGB matrix
+#undef STM32_PWM_USE_TIM1
+#define STM32_PWM_USE_TIM1 TRUE
\ No newline at end of file
diff --git a/keyboards/custommk/cmk11/readme.md b/keyboards/custommk/cmk11/readme.md
new file mode 100644
index 0000000000..961261ac66
--- /dev/null
+++ b/keyboards/custommk/cmk11/readme.md
@@ -0,0 +1,27 @@
+# CMK11
+
+![cmk11](https://i.imgur.com/y8MEwXYh.jpeg)
+
+CMK11 supports eleven 1u keys (or eight 1u keys and one 3u key). The PCB is fully compatible with the Cary Works C11 macropad.
+
+* Keyboard Maintainer: [customMK](https://github.com/customMK)
+* Hardware Supported: CMK11
+* Hardware Availability: [customMK](https://shop.custommk.com/products/cmk11)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make custommk/cmk11:default
+
+Flashing example for this keyboard:
+
+    make custommk/cmk11:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (the key in the top left corner) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available
diff --git a/keyboards/custommk/cmk11/rules.mk b/keyboards/custommk/cmk11/rules.mk
new file mode 100644
index 0000000000..72f75f4367
--- /dev/null
+++ b/keyboards/custommk/cmk11/rules.mk
@@ -0,0 +1 @@
+AUDIO_DRIVER = pwm_hardware