diff --git a/obs/error.go b/obs/error.go
new file mode 100644
index 0000000..f5d703e
--- /dev/null
+++ b/obs/error.go
@@ -0,0 +1,38 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package obs
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+type Status struct {
+	XMLName xml.Name `json:"status" xml:"status"`
+	Code    string   `json:"code" xml:"code,attr"`
+	Summary string   `json:"summary" xml:"summary"`
+}
+
+type APIError struct {
+	HTTPStatusCode int
+	OBSStatusCode  string
+	Message        string
+}
+
+func (e *APIError) Error() string {
+	return fmt.Sprintf("HTTP status %d: %s (%s)", e.HTTPStatusCode, e.OBSStatusCode, e.Message)
+}
diff --git a/obs/project.go b/obs/project.go
index 2682f24..f4ef273 100644
--- a/obs/project.go
+++ b/obs/project.go
@@ -17,7 +17,12 @@ limitations under the License.
 package obs
 
 import (
+	"bytes"
 	"encoding/xml"
+	"fmt"
+	"log"
+	"net/http"
+	"net/url"
 )
 
 type Project struct {
@@ -36,6 +41,7 @@ type Project struct {
 }
 
 type Client struct {
+	Client   http.Client
 	Username string
 	Password string
 	APIURL   string
@@ -76,8 +82,8 @@ const (
 
 type Repository struct {
 	Repository     string           `json:"name" xml:"name,attr"`
-	Architectures  []string         `json:"arch" xml:"arch"`
-	ReleaseTargets []ReleaseTarget  `json:"releasetarget,omitempty" xml:"releasetarget,omitempty"`
+	Architectures  []string         `json:"architectures" xml:"arch"`
+	ReleaseTargets []ReleaseTarget  `json:"releaseTargets,omitempty" xml:"releasetarget,omitempty"`
 	Paths          []RepositoryPath `json:"path,omitempty" xml:"path,omitempty"`
 }
 
@@ -91,3 +97,102 @@ type RepositoryPath struct {
 	Project    string `json:"project" xml:"project,attr"`
 	Repository string `json:"repository" xml:"repository,attr"`
 }
+
+func (c Client) CreateProject(project *Project) error {
+	xmlData, err := xml.MarshalIndent(project, "", " ")
+	if err != nil {
+		return err
+	}
+
+	urlPath, err := url.JoinPath(c.APIURL, "source", project.Name, "_meta")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	req, err := http.NewRequest("PUT", urlPath, bytes.NewBuffer(xmlData))
+	if err != nil {
+		return &APIError{
+			HTTPStatusCode: 0,
+			OBSStatusCode:  "",
+			Message:        fmt.Sprintf("failed to generate a new request: %v", err),
+		}
+	}
+
+	req.SetBasicAuth(c.Username, c.Password)
+	req.Header.Set("Accept", "application/xml; charset=utf-8")
+
+	resp, err := c.Client.Do(req)
+	if err != nil {
+		return &APIError{
+			HTTPStatusCode: 0,
+			OBSStatusCode:  "",
+			Message:        fmt.Sprintf("failed to make a new request: %v", err),
+		}
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		var status Status
+		if err := xml.NewDecoder(resp.Body).Decode(&status); err != nil {
+			return &APIError{
+				HTTPStatusCode: resp.StatusCode,
+				OBSStatusCode:  "",
+				Message:        fmt.Sprintf("failed to decode the error response: %v", err),
+			}
+		}
+
+		return &APIError{
+			HTTPStatusCode: resp.StatusCode,
+			OBSStatusCode:  status.Code,
+			Message:        status.Summary,
+		}
+	}
+	return nil
+}
+
+func (c Client) DeleteProject(project *Project) error {
+	urlPath, err := url.JoinPath(c.APIURL, "source", project.Name)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	req, err := http.NewRequest("DELETE", urlPath, nil)
+	if err != nil {
+		return &APIError{
+			HTTPStatusCode: 0,
+			OBSStatusCode:  "",
+			Message:        fmt.Sprintf("failed to generate a new request: %v", err),
+		}
+	}
+
+	req.SetBasicAuth(c.Username, c.Password)
+	req.Header.Set("Accept", "application/xml; charset=utf-8")
+
+	resp, err := c.Client.Do(req)
+	if err != nil {
+		return &APIError{
+			HTTPStatusCode: 0,
+			OBSStatusCode:  "",
+			Message:        fmt.Sprintf("failed to make a new request: %v", err),
+		}
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		var status Status
+		if err := xml.NewDecoder(resp.Body).Decode(&status); err != nil {
+			return &APIError{
+				HTTPStatusCode: resp.StatusCode,
+				OBSStatusCode:  "",
+				Message:        fmt.Sprintf("failed to decode the error response: %v", err),
+			}
+		}
+
+		return &APIError{
+			HTTPStatusCode: resp.StatusCode,
+			OBSStatusCode:  status.Code,
+			Message:        status.Summary,
+		}
+	}
+	return nil
+}