diff --git a/api/handlers/collections.go b/api/handlers/collections.go
new file mode 100644
index 0000000..3291988
--- /dev/null
+++ b/api/handlers/collections.go
@@ -0,0 +1,84 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/repositories"
+)
+
+func GetAllCollections(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+
+	collections, status := repositories.GetAllCollections(databaseId)
+	if status == repositories.StatusOk {
+		c.IndentedJSON(http.StatusOK, gin.H{"_rid": "", "DocumentCollections": collections})
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+}
+
+func GetCollection(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	id := c.Param("collId")
+
+	collection, status := repositories.GetCollection(databaseId, id)
+	if status == repositories.StatusOk {
+		c.IndentedJSON(http.StatusOK, collection)
+		return
+	}
+
+	if status == repositories.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+}
+
+func DeleteCollection(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	id := c.Param("collId")
+
+	status := repositories.DeleteCollection(databaseId, id)
+	if status == repositories.StatusOk {
+		c.Status(http.StatusNoContent)
+		return
+	}
+
+	if status == repositories.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+}
+
+func CreateCollection(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	var newCollection repositories.Collection
+
+	if err := c.BindJSON(&newCollection); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"message": err.Error()})
+		return
+	}
+
+	if newCollection.ID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		return
+	}
+
+	status := repositories.CreateCollection(databaseId, newCollection)
+	if status == repositories.Conflict {
+		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		return
+	}
+
+	if status == repositories.StatusOk {
+		c.IndentedJSON(http.StatusCreated, newCollection)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+}
diff --git a/api/handlers/databases.go b/api/handlers/databases.go
index 5e27406..c8aa975 100644
--- a/api/handlers/databases.go
+++ b/api/handlers/databases.go
@@ -18,7 +18,7 @@ func GetAllDatabases(c *gin.Context) {
 }
 
 func GetDatabase(c *gin.Context) {
-	id := c.Param("id")
+	id := c.Param("databaseId")
 
 	database, status := repositories.GetDatabase(id)
 	if status == repositories.StatusOk {
@@ -35,7 +35,7 @@ func GetDatabase(c *gin.Context) {
 }
 
 func DeleteDatabase(c *gin.Context) {
-	id := c.Param("id")
+	id := c.Param("databaseId")
 
 	status := repositories.DeleteDatabase(id)
 	if status == repositories.StatusOk {
diff --git a/api/router.go b/api/router.go
index 2630d68..bae8411 100644
--- a/api/router.go
+++ b/api/router.go
@@ -8,10 +8,16 @@ import (
 func CreateRouter() *gin.Engine {
 	router := gin.Default()
 
-	router.GET("/dbs/:id", handlers.GetDatabase)
-	router.DELETE("/dbs/:id", handlers.DeleteDatabase)
-	router.GET("/dbs", handlers.GetAllDatabases)
+	router.POST("/dbs/:databaseId/colls", handlers.CreateCollection)
+	router.GET("/dbs/:databaseId/colls", handlers.GetAllCollections)
+	router.GET("/dbs/:databaseId/colls/:collId", handlers.GetCollection)
+	router.DELETE("/dbs/:databaseId/colls/:collId", handlers.DeleteCollection)
+
 	router.POST("/dbs", handlers.CreateDatabase)
+	router.GET("/dbs", handlers.GetAllDatabases)
+	router.GET("/dbs/:databaseId", handlers.GetDatabase)
+	router.DELETE("/dbs/:databaseId", handlers.DeleteDatabase)
+
 	router.GET("/", handlers.GetServerInfo)
 
 	return router
diff --git a/internal/repositories/collections.go b/internal/repositories/collections.go
new file mode 100644
index 0000000..38efe28
--- /dev/null
+++ b/internal/repositories/collections.go
@@ -0,0 +1,50 @@
+package repositories
+
+var collections = []Collection{
+	{ID: "db1"},
+	{ID: "db2"},
+}
+
+func GetAllCollections(databaseId string) ([]Collection, RepositoryStatus) {
+	var dbCollections []Collection
+
+	for _, coll := range collections {
+		if coll.internals.databaseId == databaseId {
+			dbCollections = append(dbCollections, coll)
+		}
+	}
+
+	return dbCollections, StatusOk
+}
+
+func GetCollection(databaseId string, id string) (Collection, RepositoryStatus) {
+	for _, coll := range collections {
+		if coll.internals.databaseId == databaseId && coll.ID == id {
+			return coll, StatusOk
+		}
+	}
+
+	return Collection{}, StatusNotFound
+}
+
+func DeleteCollection(databaseId string, id string) RepositoryStatus {
+	for index, coll := range collections {
+		if coll.internals.databaseId == databaseId && coll.ID == id {
+			collections = append(collections[:index], collections[index+1:]...)
+			return StatusOk
+		}
+	}
+
+	return StatusNotFound
+}
+
+func CreateCollection(databaseId string, newCollection Collection) RepositoryStatus {
+	for _, coll := range collections {
+		if coll.internals.databaseId == databaseId && coll.ID == newCollection.ID {
+			return Conflict
+		}
+	}
+
+	collections = append(collections, newCollection)
+	return StatusOk
+}
diff --git a/internal/repositories/models.go b/internal/repositories/models.go
index 2f0c679..536dc08 100644
--- a/internal/repositories/models.go
+++ b/internal/repositories/models.go
@@ -11,3 +11,37 @@ const (
 	StatusNotFound = 2
 	Conflict       = 3
 )
+
+type Collection struct {
+	ID             string `json:"id"`
+	IndexingPolicy struct {
+		IndexingMode  string `json:"indexingMode"`
+		Automatic     bool   `json:"automatic"`
+		IncludedPaths []struct {
+			Path    string `json:"path"`
+			Indexes []struct {
+				Kind      string `json:"kind"`
+				DataType  string `json:"dataType"`
+				Precision int    `json:"precision"`
+			} `json:"indexes"`
+		} `json:"includedPaths"`
+		ExcludedPaths []any `json:"excludedPaths"`
+	} `json:"indexingPolicy"`
+	PartitionKey struct {
+		Paths   []string `json:"paths"`
+		Kind    string   `json:"kind"`
+		Version int      `json:"Version"`
+	} `json:"partitionKey"`
+	Rid       string `json:"_rid"`
+	Ts        int    `json:"_ts"`
+	Self      string `json:"_self"`
+	Etag      string `json:"_etag"`
+	Docs      string `json:"_docs"`
+	Sprocs    string `json:"_sprocs"`
+	Triggers  string `json:"_triggers"`
+	Udfs      string `json:"_udfs"`
+	Conflicts string `json:"_conflicts"`
+	internals struct {
+		databaseId string
+	}
+}