diff --git a/src/infra/net/proxy-env.test.ts b/src/infra/net/proxy-env.test.ts
index 1ceeae0a354..1056d81cd3e 100644
--- a/src/infra/net/proxy-env.test.ts
+++ b/src/infra/net/proxy-env.test.ts
@@ -293,6 +293,12 @@ describe("matchesNoProxy", () => {
       env: { NO_PROXY: "[::1]:8080" } as NodeJS.ProcessEnv,
       expected: true,
     },
+    {
+      name: "matches bare IPv6 literal",
+      url: "http://[::1]:8080/health",
+      env: { NO_PROXY: "::1" } as NodeJS.ProcessEnv,
+      expected: true,
+    },
     {
       name: "matches IPv4 CIDR entries",
       url: "http://100.64.0.3:8990/v1/messages",
@@ -387,6 +393,15 @@ describe("shouldUseEnvHttpProxyForUrl", () => {
       } as NodeJS.ProcessEnv,
       expected: false,
     },
+    {
+      name: "keeps strict mode for bare IPv6 NO_PROXY matches",
+      url: "http://[::1]:11434/v1",
+      env: {
+        HTTP_PROXY: "http://proxy.test:8080",
+        NO_PROXY: "::1",
+      } as NodeJS.ProcessEnv,
+      expected: false,
+    },
     {
       name: "keeps strict mode for non-http URLs",
       url: "file:///tmp/input.txt",
diff --git a/src/infra/net/proxy-env.ts b/src/infra/net/proxy-env.ts
index 330d030f41a..bbdc4cd2732 100644
--- a/src/infra/net/proxy-env.ts
+++ b/src/infra/net/proxy-env.ts
@@ -127,7 +127,7 @@ export function shouldUseEnvHttpProxyForUrl(
  *   matches (kept in sync with that behavior)
  * - Subdomain suffix match (`openai.com` matches `api.openai.com`)
  * - Optional `:port` suffix; when present, must match target port
- * - IPv6 literals in bracketed form (`[::1]`)
+ * - IPv6 literals in bracketed (`[::1]`) or bare (`::1`) form
  * - OpenClaw extension: IPv4 CIDR and octet-wildcard entries
  *   (`100.64.0.0/10`, `100.64.*`) bypass the trusted env proxy mode before
  *   undici's EnvHttpProxyAgent is selected.
@@ -187,10 +187,15 @@ export function matchesNoProxy(targetUrl: string, env: NodeJS.ProcessEnv = proce
       entryHost = m[1];
       entryPort = m[2];
     } else {
-      const colonIdx = entry.lastIndexOf(":");
-      if (colonIdx > 0 && /^\d+$/.test(entry.slice(colonIdx + 1))) {
-        entryHost = entry.slice(0, colonIdx);
-        entryPort = entry.slice(colonIdx + 1);
+      const firstColonIdx = entry.indexOf(":");
+      const lastColonIdx = entry.lastIndexOf(":");
+      if (
+        firstColonIdx > -1 &&
+        firstColonIdx === lastColonIdx &&
+        /^\d+$/.test(entry.slice(lastColonIdx + 1))
+      ) {
+        entryHost = entry.slice(0, lastColonIdx);
+        entryPort = entry.slice(lastColonIdx + 1);
       } else {
         entryHost = entry;
       }