diff --git a/README.md b/README.md
index f0c9906..13a6509 100644
--- a/README.md
+++ b/README.md
@@ -84,9 +84,17 @@ allowlist.
 
 ## OAuth1 flow (startup behavior)
 
-On startup, the server opens a browser for OAuth1 consent and waits for the
-callback. Tokens are kept in memory only for the lifetime of the server
-process. Set `X_OAUTH_PRINT_TOKENS=1` to print tokens, or
+On startup, the server needs OAuth1 access tokens to sign requests.
+
+**Non-interactive mode (headless / CI):** Set `X_OAUTH_ACCESS_TOKEN` and
+`X_OAUTH_ACCESS_TOKEN_SECRET` in your `.env`. When both are present, the
+server skips the browser flow and uses them directly.
+
+**Interactive mode (default):** If the access token env vars are empty, the
+server opens a browser for OAuth1 consent and waits for the callback. Tokens
+are kept in memory only for the lifetime of the server process.
+
+Set `X_OAUTH_PRINT_TOKENS=1` to print tokens, or
 `X_OAUTH_PRINT_AUTH_HEADER=1` to print request headers.
 
 ## Available tool calls (allowlist-ready)
diff --git a/server.py b/server.py
index bec2a2e..11002e3 100644
--- a/server.py
+++ b/server.py
@@ -314,7 +314,12 @@ def build_oauth1_client() -> OAuth1Client:
         raise RuntimeError(
             "Missing X_OAUTH_CONSUMER_KEY or X_OAUTH_CONSUMER_SECRET for OAuth1 signing."
         )
-    access_token, access_secret = run_oauth1_flow()
+    access_token = os.getenv("X_OAUTH_ACCESS_TOKEN", "").strip()
+    access_secret = os.getenv("X_OAUTH_ACCESS_TOKEN_SECRET", "").strip()
+    if access_token and access_secret:
+        OAUTH_LOGGER.info("Using pre-configured OAuth1 access tokens.")
+    else:
+        access_token, access_secret = run_oauth1_flow()
     if is_truthy(os.getenv("X_OAUTH_PRINT_TOKENS", "0")):
         print("OAuth1 access token:", access_token)
         print("OAuth1 access token secret:", access_secret)