diff --git a/packages/airnode-feed/README.md b/packages/airnode-feed/README.md
index 14a92213..e3bcce3e 100644
--- a/packages/airnode-feed/README.md
+++ b/packages/airnode-feed/README.md
@@ -283,11 +283,12 @@ Configuration for the signed APIs. Each signed API is defined by a `signedApiNam
 example:
 
 ```jsonc
-// Defines a single signed API.
+// Defines a single signed API that uses AUTH_TOKEN secret as Bearer token when pushing signed data to signed API.
 "signedApis": [
   {
     "name": "localhost",
-    "url": "http://localhost:8090"
+    "url": "http://localhost:8090",
+    "authToken": "${AUTH_TOKEN}"
   }
 ]
 ```
@@ -304,6 +305,13 @@ The name of the signed API.
 
 The URL of the signed API.
 
+#### `authToken`
+
+The authentication token used to authenticate with the signed API. It is recommended to interpolate this value from
+secrets.
+
+If the signed API does not require authentication, set this value to `null`.
+
 #### `ois`
 
 Configuration for the OISes.
diff --git a/packages/api/README.md b/packages/api/README.md
index 602be41a..e854a9c0 100644
--- a/packages/api/README.md
+++ b/packages/api/README.md
@@ -145,15 +145,17 @@ The API needs to be configured with endpoints to be served. This is done via the
 ```jsonc
 // Defines two endpoints.
 "endpoints": [
-  // Serves the non-delayed data on URL path "/real-time".
+  // Serves the non-delayed data on URL path "/real-time". Requesters need to provide the "some-secret-token" as Bearer token.
   {
     "urlPath": "/real-time",
-    "delaySeconds": 0
+    "delaySeconds": 0,
+    "authTokens": ["some-secret-token"],
   },
-  // Serves the data delayed by 15 seconds on URL path "/delayed".
+  // Serves the data delayed by 15 seconds on URL path "/delayed". No authentication is required.
   {
     "urlPath": "/delayed",
-    "delaySeconds": 15
+    "delaySeconds": 15,
+    "authTokens": null,
   }
 ]
 ```
@@ -171,6 +173,14 @@ dashes.
 
 The delay in seconds for the endpoint. The endpoint will only serve data that is older than the delay.
 
+###### `authTokens`
+
+The nonempty list of
+[Bearer authentication tokens](https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication#bearer) allowed to query
+the data.
+
+In case the endpoint should be publicly available, set the value to `null`.
+
 #### `cache` _(optional)_
 
 Configures the cache for the API endpoints.
@@ -190,8 +200,8 @@ The maximum age of the cache in seconds. The cache is cleared after this time.
 
 #### `allowedAirnodes`
 
-The list of allowed Airnode addresses. If the list is empty, no Airnode is allowed. To whitelist all Airnodes, set the
-value to `"*"` instead of an array.
+The list of allowed Airnodes with authorization details. If the list is empty, no Airnode is allowed. To whitelist all
+Airnodes, set the value to `"*"` instead of an array.
 
 Example:
 
@@ -203,10 +213,33 @@ Example:
 or
 
 ```jsonc
-// Allows pushing signed data only from the specific Airnode.
-"allowedAirnodes": ["0xB47E3D8734780430ee6EfeF3c5407090601Dcd15"]
+// Allows pushing signed data only for the specific Airnode. No authorization is required to push the data.
+"allowedAirnodes": [ { "address": "0xB47E3D8734780430ee6EfeF3c5407090601Dcd15", "authTokens": null } ]
+```
+
+or
+
+```jsonc
+// Allows pushing signed data only for the specific Airnode. The pusher needs to authorize with one of the specific tokens.
+"allowedAirnodes": { "address": "0xbF3137b0a7574563a23a8fC8badC6537F98197CC", "authTokens": ["some-secret-token-for-airnode-feed"] }
 ```
 
+##### `allowedAirnodes[n]`
+
+One of the allowed Airnodes.
+
+###### `address`
+
+The address of the Airnode. The address must be a valid Ethereum address.
+
+###### `authTokens`
+
+The nonempty list of
+[Bearer authentication tokens](https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication#bearer).
+
+To allow pushing data without any authorization, set the value to `null`. The API validates the data, but this is not
+recommended.
+
 ##### `stage`
 
 An identifier of the deployment stage. This is used to distinguish between different deployments of Signed API, for