diff --git a/packages/adapters/hermes/src/server/command-resolution.test.ts b/packages/adapters/hermes/src/server/command-resolution.test.ts
index 2b8b1a97ed3..9512b78fcea 100644
--- a/packages/adapters/hermes/src/server/command-resolution.test.ts
+++ b/packages/adapters/hermes/src/server/command-resolution.test.ts
@@ -1,10 +1,10 @@
 import os from "node:os";
 import path from "node:path";
-import { chmod, mkdtemp, rm, writeFile } from "node:fs/promises";
+import { chmod, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
 import { expect, test } from "vitest";
 
 import { HERMES_CLI } from "../shared/constants.js";
-import { resolveHermesCommand } from "./execute.js";
+import { execute, resolveHermesCommand } from "./execute.js";
 import { testEnvironment } from "./test.js";
 
 test("resolveHermesCommand prefers hermesCommand over command", () => {
@@ -47,6 +47,56 @@ test("testEnvironment accepts config.command when hermesCommand is absent", asyn
   }
 });
 
+test("execute renders prompt API base from adapter env PAPERCLIP_API_URL", async () => {
+  const tempDir = await mkdtemp(path.join(os.tmpdir(), "hermes-prompt-api-url-"));
+  const cliPath = path.join(tempDir, "fake-hermes");
+  const argvPath = path.join(tempDir, "argv.txt");
+  const originalApiUrl = process.env.PAPERCLIP_API_URL;
+
+  try {
+    process.env.PAPERCLIP_API_URL = "https://public.example.com/api";
+    await writeFile(
+      cliPath,
+      [
+        "#!/bin/sh",
+        `printf '%s\\n' "$@" > ${JSON.stringify(argvPath)}`,
+        "printf 'done\\n\\nsession_id: test-session\\n'",
+        "",
+      ].join("\n"),
+      "utf8",
+    );
+    await chmod(cliPath, 0o755);
+
+    await execute({
+      runId: "run-test",
+      agent: {
+        id: "agent-test",
+        name: "Hermes Test Agent",
+        companyId: "company-test",
+      },
+      config: {
+        hermesCommand: cliPath,
+        env: {
+          PAPERCLIP_API_URL: { type: "plain", value: "http://127.0.0.1:3101" },
+        },
+      },
+      runtime: {},
+      onLog: async () => {},
+    } as any);
+
+    const argv = await readFile(argvPath, "utf8");
+    expect(argv).toContain("- API base: http://127.0.0.1:3101/api");
+    expect(argv).not.toContain("https://public.example.com/api");
+  } finally {
+    if (originalApiUrl === undefined) {
+      delete process.env.PAPERCLIP_API_URL;
+    } else {
+      process.env.PAPERCLIP_API_URL = originalApiUrl;
+    }
+    await rm(tempDir, { recursive: true, force: true });
+  }
+});
+
 test("managed connections probe the selected environment without falling back to host keys", async () => {
   const tempDir = await mkdtemp(path.join(os.tmpdir(), "hermes-managed-probe-"));
   const cliPath = path.join(tempDir, "fake-hermes");
diff --git a/packages/adapters/hermes/src/server/execute.ts b/packages/adapters/hermes/src/server/execute.ts
index 98a5d85846e..b018acab243 100644
--- a/packages/adapters/hermes/src/server/execute.ts
+++ b/packages/adapters/hermes/src/server/execute.ts
@@ -72,6 +72,14 @@ function cfgStringArray(v: unknown): string[] | undefined {
     ? (v as string[])
     : undefined;
 }
+function cfgEnvString(v: unknown): string | undefined {
+  if (typeof v === "string" && v.length > 0) return v;
+  if (v && typeof v === "object" && "value" in v) {
+    const value = (v as { value?: unknown }).value;
+    return typeof value === "string" && value.length > 0 ? value : undefined;
+  }
+  return undefined;
+}
 
 export function resolveHermesCommand(config: Record<string, unknown>): string {
   return cfgString(config.hermesCommand) || cfgString(config.command) || HERMES_CLI;
@@ -432,8 +440,17 @@ export async function execute(
   }
 
   // ── Build prompt ───────────────────────────────────────────────────────
+  const userEnvForPrompt = config.env as Record<string, unknown> | undefined;
+  const promptConfig: Record<string, unknown> = { ...config };
+  if (!cfgString(promptConfig.paperclipApiUrl) && userEnvForPrompt && typeof userEnvForPrompt === "object") {
+    const configuredPaperclipApiUrl = cfgEnvString(userEnvForPrompt.PAPERCLIP_API_URL);
+    if (configuredPaperclipApiUrl) {
+      promptConfig.paperclipApiUrl = configuredPaperclipApiUrl;
+    }
+  }
+
   const sessionId = persistSession ? prevSessionId : undefined;
-  const prompt = buildPrompt(ctx, config, { resumedSession: Boolean(sessionId) });
+  const prompt = buildPrompt(ctx, promptConfig, { resumedSession: Boolean(sessionId) });
 
   // ── Build command args ─────────────────────────────────────────────────
   // Use -Q (quiet) to get clean output: just response + session_id line