diff --git a/README.md b/README.md
index 2d4dffa..cf2e4a2 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,15 @@ provider "towerops" {
 }
 ```
 
+To use a custom API URL (e.g., for self-hosted or development):
+
+```hcl
+provider "towerops" {
+  token   = var.towerops_api_token
+  api_url = "https://custom.example.com"
+}
+```
+
 You can also set the token via environment variable:
 
 ```bash
diff --git a/docs/index.md b/docs/index.md
index 39ac15f..ef2d69d 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -45,3 +45,7 @@ resource "towerops_device" "router" {
 ### Required
 
 - `token` (String, Sensitive) - The API token for authenticating with TowerOps.
+
+### Optional
+
+- `api_url` (String) - The base URL for the TowerOps API. Defaults to `https://towerops.net`.
diff --git a/internal/provider/client.go b/internal/provider/client.go
index 963f71b..e439f2c 100644
--- a/internal/provider/client.go
+++ b/internal/provider/client.go
@@ -19,9 +19,12 @@ type Client struct {
 }
 
 // NewClient creates a new TowerOps API client.
-func NewClient(token string) *Client {
+func NewClient(token, baseURL string) *Client {
+	if baseURL == "" {
+		baseURL = defaultBaseURL
+	}
 	return &Client{
-		BaseURL: defaultBaseURL,
+		BaseURL: baseURL,
 		Token:   token,
 		HTTPClient: &http.Client{
 			Timeout: 30 * time.Second,
diff --git a/internal/provider/provider.go b/internal/provider/provider.go
index d858f9f..99ca25c 100644
--- a/internal/provider/provider.go
+++ b/internal/provider/provider.go
@@ -19,7 +19,8 @@ type ToweropsProvider struct {
 
 // ToweropsProviderModel describes the provider data model.
 type ToweropsProviderModel struct {
-	Token types.String `tfsdk:"token"`
+	Token  types.String `tfsdk:"token"`
+	APIURL types.String `tfsdk:"api_url"`
 }
 
 // New creates a new provider instance.
@@ -45,6 +46,10 @@ func (p *ToweropsProvider) Schema(ctx context.Context, req provider.SchemaReques
 				Required:    true,
 				Sensitive:   true,
 			},
+			"api_url": schema.StringAttribute{
+				Description: "The base URL for the TowerOps API. Defaults to https://towerops.net.",
+				Optional:    true,
+			},
 		},
 	}
 }
@@ -73,7 +78,7 @@ func (p *ToweropsProvider) Configure(ctx context.Context, req provider.Configure
 		return
 	}
 
-	client := NewClient(config.Token.ValueString())
+	client := NewClient(config.Token.ValueString(), config.APIURL.ValueString())
 
 	resp.DataSourceData = client
 	resp.ResourceData = client