diff --git a/docs/api-reference/v1/authentication.mdx b/docs/api-reference/v1/authentication.mdx
index 40ee0d68b0..a09bd30873 100644
--- a/docs/api-reference/v1/authentication.mdx
+++ b/docs/api-reference/v1/authentication.mdx
@@ -2,6 +2,10 @@
 title: "Authentication"
 ---
 
+<Warning>
+**API v1 is deprecated and will be discontinued on February 15, 2026.** Please migrate to [API v2](/api-reference/v2/introduction) as soon as possible.
+</Warning>
+
 The Cal.com API uses API keys to authenticate requests. You can view and manage your API keys in your settings page under the security tab in Cal.com.
 
 <img src="/images/i1600x899-DllqhV6w_3Vj_oxtjov.png" />
diff --git a/docs/api-reference/v1/errors.mdx b/docs/api-reference/v1/errors.mdx
index edabcea533..4e36d66413 100644
--- a/docs/api-reference/v1/errors.mdx
+++ b/docs/api-reference/v1/errors.mdx
@@ -2,6 +2,10 @@
 title: "Errors"
 ---
 
+<Warning>
+**API v1 is deprecated and will be discontinued on February 15, 2026.** Please migrate to [API v2](/api-reference/v2/introduction) as soon as possible.
+</Warning>
+
 Cal.com uses conventional HTTP response codes to indicate the success or failure of an API request. In general: Codes in the 2xx range indicate success. Codes in the 4xx range indicate an error that failed given the information provided (e.g., a required parameter was omitted, or something else failed, etc.). Codes in the 5xx range indicate an error with Cal.com's servers (these are rare).
 
 <table>
diff --git a/docs/api-reference/v1/introduction.mdx b/docs/api-reference/v1/introduction.mdx
index bd14244d23..5c8a60716a 100644
--- a/docs/api-reference/v1/introduction.mdx
+++ b/docs/api-reference/v1/introduction.mdx
@@ -2,6 +2,10 @@
 title: "Quick start"
 ---
 
+<Warning>
+**API v1 is deprecated and will be discontinued on February 15, 2026.** Please migrate to [API v2](/api-reference/v2/introduction) as soon as possible.
+</Warning>
+
 ## Get your API keys
 
 Your API requests are authenticated using API keys. Any request that doesn't include an API key will return an error.
diff --git a/docs/api-reference/v1/rate-limit.mdx b/docs/api-reference/v1/rate-limit.mdx
index b62b0fe050..c48ceac063 100644
--- a/docs/api-reference/v1/rate-limit.mdx
+++ b/docs/api-reference/v1/rate-limit.mdx
@@ -2,6 +2,10 @@
 title: "Rate limits"
 ---
 
+<Warning>
+**API v1 is deprecated and will be discontinued on February 15, 2026.** Please migrate to [API v2](/api-reference/v2/introduction) as soon as possible.
+</Warning>
+
 We limit the number of calls you can make over a certain period of time. Rate limits vary and are specified by the following header in all responses:
 
 <table>
diff --git a/docs/mint.json b/docs/mint.json
index 5ac640a68a..e0d97b2011 100644
--- a/docs/mint.json
+++ b/docs/mint.json
@@ -52,7 +52,11 @@
     {
       "name": "API v1 Reference",
       "openapi": "/api-reference/v1/openapi-v1.json",
-      "url": "api-reference/v1"
+      "url": "api-reference/v1",
+      "banner": {
+        "type": "warning",
+        "content": "API v1 will be discontinued on February 15, 2026. Please migrate to [API v2](/api-reference/v2/introduction)."
+      }
     }
   ],
   "navigation": [