diff --git a/backend/routes/auth/routes.go b/backend/routes/auth/routes.go
index 7fec89c..1b7ad53 100644
--- a/backend/routes/auth/routes.go
+++ b/backend/routes/auth/routes.go
@@ -144,9 +144,9 @@ type oauthURLsRequest struct {
 }
 
 type oauthURLsResponse struct {
-	Discord string `json:"discord"`
-	Tumblr  string `json:"tumblr"`
-	Google  string `json:"google"`
+	Discord string `json:"discord,omitempty"`
+	Tumblr  string `json:"tumblr,omitempty"`
+	Google  string `json:"google,omitempty"`
 }
 
 func (s *Server) oauthURLs(w http.ResponseWriter, r *http.Request) error {
@@ -162,22 +162,25 @@ func (s *Server) oauthURLs(w http.ResponseWriter, r *http.Request) error {
 	if err != nil {
 		return errors.Wrap(err, "setting CSRF state")
 	}
+	var resp oauthURLsResponse
 
-	// copy Discord config and set redirect url
-	discordCfg := discordOAuthConfig
-	discordCfg.RedirectURL = req.CallbackDomain + "/auth/login/discord"
-	// copy tumblr config
-	tumblrCfg := tumblrOAuthConfig
-	tumblrCfg.RedirectURL = req.CallbackDomain + "/auth/login/tumblr"
-	// copy google config
-	googleCfg := googleOAuthConfig
-	googleCfg.RedirectURL = req.CallbackDomain + "/auth/login/google"
+	if discordOAuthConfig.ClientID != "" {
+		discordCfg := discordOAuthConfig
+		discordCfg.RedirectURL = req.CallbackDomain + "/auth/login/discord"
+		resp.Discord = discordCfg.AuthCodeURL(state) + "&prompt=none"
+	}
+	if tumblrOAuthConfig.ClientID != "" {
+		tumblrCfg := tumblrOAuthConfig
+		tumblrCfg.RedirectURL = req.CallbackDomain + "/auth/login/tumblr"
+		resp.Tumblr = tumblrCfg.AuthCodeURL(state)
+	}
+	if googleOAuthConfig.ClientID != "" {
+		googleCfg := googleOAuthConfig
+		googleCfg.RedirectURL = req.CallbackDomain + "/auth/login/google"
+		resp.Google = googleCfg.AuthCodeURL(state)
+	}
 
-	render.JSON(w, r, oauthURLsResponse{
-		Discord: discordCfg.AuthCodeURL(state) + "&prompt=none",
-		Tumblr:  tumblrCfg.AuthCodeURL(state),
-		Google:  googleCfg.AuthCodeURL(state),
-	})
+	render.JSON(w, r, resp)
 	return nil
 }
 
diff --git a/frontend/src/lib/api/responses.ts b/frontend/src/lib/api/responses.ts
index 561deba..9af4647 100644
--- a/frontend/src/lib/api/responses.ts
+++ b/frontend/src/lib/api/responses.ts
@@ -14,9 +14,9 @@ export interface MetaResponse {
 }
 
 export interface UrlsResponse {
-  discord: string;
-  tumblr: string;
-  google: string;
+  discord?: string;
+  tumblr?: string;
+  google?: string;
 }
 
 export interface ExportResponse {
diff --git a/frontend/src/routes/auth/login/+page.svelte b/frontend/src/routes/auth/login/+page.svelte
index c7ee00b..528f7c0 100644
--- a/frontend/src/routes/auth/login/+page.svelte
+++ b/frontend/src/routes/auth/login/+page.svelte
@@ -60,9 +60,15 @@
     <div class="col-md-4 mb-1">
       <ListGroup>
         <ListGroupItem tag="button" on:click={toggleModal}>Log in with the Fediverse</ListGroupItem>
-        <ListGroupItem tag="a" href={data.discord}>Log in with Discord</ListGroupItem>
-        <ListGroupItem tag="a" href={data.tumblr}>Log in with Tumblr</ListGroupItem>
-        <ListGroupItem tag="a" href={data.google}>Log in with Google</ListGroupItem>
+        {#if data.discord}
+          <ListGroupItem tag="a" href={data.discord}>Log in with Discord</ListGroupItem>
+        {/if}
+        {#if data.tumblr}
+          <ListGroupItem tag="a" href={data.tumblr}>Log in with Tumblr</ListGroupItem>
+        {/if}
+        {#if data.google}
+          <ListGroupItem tag="a" href={data.google}>Log in with Google</ListGroupItem>
+        {/if}
       </ListGroup>
       <Modal header="Pick an instance" isOpen={modalOpen} toggle={toggleModal}>
         <ModalBody>
diff --git a/frontend/src/routes/settings/auth/+page.svelte b/frontend/src/routes/settings/auth/+page.svelte
index 59dfb03..7c10704 100644
--- a/frontend/src/routes/settings/auth/+page.svelte
+++ b/frontend/src/routes/settings/auth/+page.svelte
@@ -132,72 +132,78 @@
         </CardBody>
       </Card>
     </div>
-    <div class="my-2">
-      <Card>
-        <CardBody>
-          <CardTitle>Discord</CardTitle>
-          <CardText>
+    {#if data.user.discord || data.urls.discord}
+      <div class="my-2">
+        <Card>
+          <CardBody>
+            <CardTitle>Discord</CardTitle>
+            <CardText>
+              {#if data.user.discord}
+                Your currently linked Discord account is <b>{data.user.discord_username}</b>
+                (<code>{data.user.discord}</code>).
+              {:else}
+                You do not have a linked Discord account.
+              {/if}
+            </CardText>
             {#if data.user.discord}
-              Your currently linked Discord account is <b>{data.user.discord_username}</b>
-              (<code>{data.user.discord}</code>).
-            {:else}
-              You do not have a linked Discord account.
+              <Button color="danger" disabled={!canUnlink} on:click={toggleDiscordUnlinkModal}
+                >Unlink account</Button
+              >
+            {:else if data.urls.discord}
+              <Button color="secondary" href={data.urls.discord}>Link account</Button>
             {/if}
-          </CardText>
-          {#if data.user.discord}
-            <Button color="danger" disabled={!canUnlink} on:click={toggleDiscordUnlinkModal}
-              >Unlink account</Button
-            >
-          {:else}
-            <Button color="secondary" href={data.urls.discord}>Link account</Button>
-          {/if}
-        </CardBody>
-      </Card>
-    </div>
-    <div class="my-2">
-      <Card>
-        <CardBody>
-          <CardTitle>Tumblr</CardTitle>
-          <CardText>
+          </CardBody>
+        </Card>
+      </div>
+    {/if}
+    {#if data.user.tumblr || data.urls.tumblr}
+      <div class="my-2">
+        <Card>
+          <CardBody>
+            <CardTitle>Tumblr</CardTitle>
+            <CardText>
+              {#if data.user.tumblr}
+                Your currently linked Tumblr account is <b>{data.user.tumblr_username}</b>
+                (<code>{data.user.tumblr}</code>).
+              {:else}
+                You do not have a linked Tumblr account.
+              {/if}
+            </CardText>
             {#if data.user.tumblr}
-              Your currently linked Tumblr account is <b>{data.user.tumblr_username}</b>
-              (<code>{data.user.tumblr}</code>).
-            {:else}
-              You do not have a linked Tumblr account.
+              <Button color="danger" disabled={!canUnlink} on:click={toggleTumblrUnlinkModal}
+                >Unlink account</Button
+              >
+            {:else if data.urls.tumblr}
+              <Button color="secondary" href={data.urls.tumblr}>Link account</Button>
             {/if}
-          </CardText>
-          {#if data.user.tumblr}
-            <Button color="danger" disabled={!canUnlink} on:click={toggleTumblrUnlinkModal}
-              >Unlink account</Button
-            >
-          {:else}
-            <Button color="secondary" href={data.urls.tumblr}>Link account</Button>
-          {/if}
-        </CardBody>
-      </Card>
-    </div>
-    <div class="my-2">
-      <Card>
-        <CardBody>
-          <CardTitle>Google</CardTitle>
-          <CardText>
+          </CardBody>
+        </Card>
+      </div>
+    {/if}
+    {#if data.user.google || data.urls.google}
+      <div class="my-2">
+        <Card>
+          <CardBody>
+            <CardTitle>Google</CardTitle>
+            <CardText>
+              {#if data.user.google}
+                Your currently linked Google account is <b>{data.user.google_username}</b>
+                (<code>{data.user.google}</code>).
+              {:else}
+                You do not have a linked Google account.
+              {/if}
+            </CardText>
             {#if data.user.google}
-              Your currently linked Google account is <b>{data.user.google_username}</b>
-              (<code>{data.user.google}</code>).
-            {:else}
-              You do not have a linked Google account.
+              <Button color="danger" disabled={!canUnlink} on:click={toggleGoogleUnlinkModal}
+                >Unlink account</Button
+              >
+            {:else if data.urls.google}
+              <Button color="secondary" href={data.urls.google}>Link account</Button>
             {/if}
-          </CardText>
-          {#if data.user.google}
-            <Button color="danger" disabled={!canUnlink} on:click={toggleGoogleUnlinkModal}
-              >Unlink account</Button
-            >
-          {:else}
-            <Button color="secondary" href={data.urls.google}>Link account</Button>
-          {/if}
-        </CardBody>
-      </Card>
-    </div>
+          </CardBody>
+        </Card>
+      </div>
+    {/if}
     <Modal header="Pick an instance" isOpen={fediLinkModalOpen} toggle={toggleFediLinkModal}>
       <ModalBody>
         <Input placeholder="Instance (e.g. mastodon.social)" bind:value={instance} />