diff --git a/internal/client/modules.go b/internal/client/modules.go
new file mode 100644
index 000000000..c95f4c5c7
--- /dev/null
+++ b/internal/client/modules.go
@@ -0,0 +1,70 @@
+// Package client - modules contains functions for the modules API
+// Copyright (C) 2020 by Red Hat, Inc.
+package client
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	//	"strings"
+
+	"github.com/osbuild/osbuild-composer/internal/rpmmd"
+	"github.com/osbuild/osbuild-composer/internal/weldr"
+)
+
+// ListAllModulesV0 returns a list of all the available module names
+func ListAllModulesV0(socket *http.Client) ([]weldr.ModuleName, *APIResponse, error) {
+	body, resp, err := GetJSONAll(socket, "/api/v0/modules/list")
+	if resp != nil || err != nil {
+		return nil, resp, err
+	}
+	var list weldr.ModulesListV0
+	err = json.Unmarshal(body, &list)
+	if err != nil {
+		return nil, nil, err
+	}
+	return list.Modules, nil, nil
+}
+
+// ListSomeModulesV0 returns a list of all the available modules names
+func ListSomeModulesV0(socket *http.Client, offset, limit int) ([]weldr.ModuleName, *APIResponse, error) {
+	path := fmt.Sprintf("/api/v0/modules/list?offset=%d&limit=%d", offset, limit)
+	body, resp, err := GetRaw(socket, "GET", path)
+	if resp != nil || err != nil {
+		return nil, resp, err
+	}
+	var list weldr.ModulesListV0
+	err = json.Unmarshal(body, &list)
+	if err != nil {
+		return nil, nil, err
+	}
+	return list.Modules, nil, nil
+}
+
+// ListModulesV0 returns a list of all the available modules names
+func ListModulesV0(socket *http.Client, moduleNames string) ([]weldr.ModuleName, *APIResponse, error) {
+	body, resp, err := GetRaw(socket, "GET", "/api/v0/modules/list/"+moduleNames)
+	if resp != nil || err != nil {
+		return nil, resp, err
+	}
+	var list weldr.ModulesListV0
+	err = json.Unmarshal(body, &list)
+	if err != nil {
+		return nil, nil, err
+	}
+	return list.Modules, nil, nil
+}
+
+// GetModulesInfoV0 returns detailed module info on the named modules
+func GetModulesInfoV0(socket *http.Client, modulesNames string) ([]rpmmd.PackageInfo, *APIResponse, error) {
+	body, resp, err := GetRaw(socket, "GET", "/api/v0/modules/info/"+modulesNames)
+	if resp != nil || err != nil {
+		return nil, resp, err
+	}
+	var list weldr.ModulesInfoV0
+	err = json.Unmarshal(body, &list)
+	if err != nil {
+		return nil, nil, err
+	}
+	return list.Modules, nil, nil
+}
diff --git a/internal/weldr/json.go b/internal/weldr/json.go
index 20fa9a641..be81cce4c 100644
--- a/internal/weldr/json.go
+++ b/internal/weldr/json.go
@@ -140,6 +140,18 @@ type ProjectsDependenciesV0 struct {
 	Projects []rpmmd.PackageSpec `json:"projects"`
 }
 
+type ModuleName struct {
+	Name      string `json:"name"`
+	GroupType string `json:"group_type"`
+}
+
+type ModulesListV0 struct {
+	Total   uint         `json:"total"`
+	Offset  uint         `json:"offset"`
+	Limit   uint         `json:"limit"`
+	Modules []ModuleName `json:"modules"`
+}
+
 // ModulesInfoV0 is the response to /modules/info request
 type ModulesInfoV0 struct {
 	Modules []rpmmd.PackageInfo `json:"modules"`