diff --git a/bin/dm.py b/bin/dm.py
new file mode 100755
index 0000000..c7eb93a
--- /dev/null
+++ b/bin/dm.py
@@ -0,0 +1,109 @@
+#!/usr/bin/env python3
+"""
+DM: Headless Direct Message API (muse.ai)
+
+Distinct from Chat (front-door, externally hosted).
+DM operates via headless browser automation on muse.ai.
+Chat operates via signed HTTPS API to chat.muse-dev.online.
+
+This separation increases headless reliability by isolating
+browser automation from network API calls.
+
+Usage:
+  dm.py send --agent 646 --target <chat_id|main> "message"
+  dm.py read --agent 646 --target <chat_id|main> [n]
+  dm.py thread --from 646 --to muse --target <chat_id|main> "message"
+"""
+import argparse
+import subprocess
+import time
+import sys
+
+API = "/home/super/Projects/NetVM/bin/muse-chat-api.py"
+NETVM_EXEC = "/home/super/Projects/NetVM/bin/netvm-exec.sh"
+VALID_AGENTS = ["muse", "pip", "646"]
+
+def run(cmd, timeout=60):
+    result = subprocess.run(cmd, shell=True, capture_output=True, text=True, timeout=timeout)
+    return result.stdout.strip()
+
+def dm_send(agent, target, message):
+    """Send a DM via headless to agent's target (main or side chat)."""
+    if agent not in VALID_AGENTS:
+        print(f"ERROR: Unknown agent {agent}", file=sys.stderr)
+        sys.exit(1)
+    
+    # Navigate to target
+    if target == "main":
+        run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} sidechat main")
+    else:
+        run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} sidechat use {target}")
+    
+    time.sleep(2)
+    
+    # Send
+    safe = message.replace('"', '\\"').replace('$', '\\$').replace('`', '\\`')[:1000]
+    result = run(f'{NETVM_EXEC} {agent} -- python3 {API} --account {agent} send "{safe}"')
+    
+    # Back to main
+    run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} sidechat main")
+    
+    print(f"DM sent to {agent}/{target}")
+    return result
+
+def dm_read(agent, target, n=5):
+    """Read DMs via headless from agent's target."""
+    if agent not in VALID_AGENTS:
+        print(f"ERROR: Unknown agent {agent}", file=sys.stderr)
+        sys.exit(1)
+    
+    if target == "main":
+        run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} sidechat main")
+    else:
+        run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} sidechat use {target}")
+    
+    time.sleep(2)
+    msgs = run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} messages {n}")
+    run(f"{NETVM_EXEC} {agent} -- python3 {API} --account {agent} sidechat main")
+    
+    print(msgs)
+    return msgs
+
+def dm_thread(from_agent, to_agent, target, message):
+    """Thread a message from one agent into another's chat (via operator)."""
+    # Read from source (optional, for context)
+    # Send to target with attribution
+    attributed = f"[{from_agent}] {message}"
+    return dm_send(to_agent, target, attributed)
+
+def main():
+    p = argparse.ArgumentParser(description="DM: Headless Direct Messages (muse.ai)")
+    sub = p.add_subparsers(dest='cmd', required=True)
+    
+    # dm send
+    ps = sub.add_parser('send', help='Send a DM via headless')
+    ps.add_argument('--agent', required=True, choices=VALID_AGENTS)
+    ps.add_argument('--target', required=True, help='main or chat_id')
+    ps.add_argument('message', help='Message to send')
+    ps.set_defaults(func=lambda a: dm_send(a.agent, a.target, a.message))
+    
+    # dm read
+    pr = sub.add_parser('read', help='Read DMs via headless')
+    pr.add_argument('--agent', required=True, choices=VALID_AGENTS)
+    pr.add_argument('--target', required=True, help='main or chat_id')
+    pr.add_argument('--n', type=int, default=5, help='Number of messages')
+    pr.set_defaults(func=lambda a: dm_read(a.agent, a.target, a.n))
+    
+    # dm thread
+    pt = sub.add_parser('thread', help='Thread from one agent to another')
+    pt.add_argument('--from', dest='from_agent', required=True, choices=VALID_AGENTS)
+    pt.add_argument('--to', dest='to_agent', required=True, choices=VALID_AGENTS)
+    pt.add_argument('--target', required=True, help='main or chat_id on target')
+    pt.add_argument('message', help='Message to thread')
+    pt.set_defaults(func=lambda a: dm_thread(a.from_agent, a.to_agent, a.target, a.message))
+    
+    args = p.parse_args()
+    args.func(args)
+
+if __name__ == '__main__':
+    main()