diff --git a/hbs2-core/lib/HBS2/Actors/Peer.hs b/hbs2-core/lib/HBS2/Actors/Peer.hs
index a141dd4f..258d1b20 100644
--- a/hbs2-core/lib/HBS2/Actors/Peer.hs
+++ b/hbs2-core/lib/HBS2/Actors/Peer.hs
@@ -383,17 +383,18 @@ newPeerEnv :: forall e m . ( MonadIO m
                            , Hashable (PubKey 'Sign (Encryption e))
                            , Hashable PeerNonce
                            )
-          => AnyStorage
+          => AnyPeerLocator e
+          -> AnyStorage
           -> Fabriq e
           -> Peer e
           -> m (PeerEnv e)
 
-newPeerEnv s bus p = do
+newPeerEnv pl s bus p = do
   let _envSelf      = p
   _envPeerNonce     <- newNonce @()
   let _envFab       = bus
   let _envStorage   = s
-  _envPeerLocator   <- AnyPeerLocator <$> newStaticPeerLocator @e mempty
+  let _envPeerLocator = pl
   _envDeferred      <- newPipeline defProtoPipelineSize
   _envSessions      <- liftIO (Cache.newCache (Just defCookieTimeout))
   _envEvents        <- liftIO (newTVarIO mempty)
diff --git a/hbs2-core/lib/HBS2/Net/PeerLocator.hs b/hbs2-core/lib/HBS2/Net/PeerLocator.hs
index ab6182f0..14eb7215 100644
--- a/hbs2-core/lib/HBS2/Net/PeerLocator.hs
+++ b/hbs2-core/lib/HBS2/Net/PeerLocator.hs
@@ -13,16 +13,20 @@ class PeerLocator e l where
   bestPeers    :: forall m . (HasPeer e, MonadIO m) => l -> m [Peer e]
   addExcluded  :: forall m . (HasPeer e, MonadIO m) => l -> [Peer e] -> m ()
 
+  knownPeersForPEX :: forall m . (HasPeer e, MonadIO m) => l -> m [Peer e]
+  knownPeersForPEX = knownPeers
+
 data AnyPeerLocator e = forall a . PeerLocator e a => AnyPeerLocator a
 
 instance HasPeer e => PeerLocator e (AnyPeerLocator e) where
   knownPeers (AnyPeerLocator l) = knownPeers  l
+  knownPeersForPEX (AnyPeerLocator l) = knownPeersForPEX  l
   addPeers (AnyPeerLocator l) = addPeers l
   delPeers (AnyPeerLocator l) = delPeers l
   addExcluded (AnyPeerLocator l) = addExcluded l
 
   -- FIXME: a better algorithm of choice
-  bestPeers (AnyPeerLocator l) = liftIO $ knownPeers l >>= shuffleM
+  bestPeers (AnyPeerLocator l) = knownPeers l >>= liftIO . shuffleM
 
 class Monad m => HasPeerLocator e m where
   getPeerLocator ::  m (AnyPeerLocator e)
diff --git a/hbs2-core/lib/HBS2/Net/Proto/PeerExchange.hs b/hbs2-core/lib/HBS2/Net/Proto/PeerExchange.hs
index 6aa966c9..581432a4 100644
--- a/hbs2-core/lib/HBS2/Net/Proto/PeerExchange.hs
+++ b/hbs2-core/lib/HBS2/Net/Proto/PeerExchange.hs
@@ -67,11 +67,10 @@ peerExchangeProto :: forall e m . ( MonadIO m
                                   , Pretty (Peer e)
                                   , e ~ L4Proto
                                   )
-                  => ( [Peer e] -> m [Peer e] )
-                  ->  PeerExchange e
+                  => PeerExchange e
                   -> m ()
 
-peerExchangeProto pexFilt  msg = do
+peerExchangeProto msg = do
   case msg of
     PeerExchangeGet n -> peerExchangeGet PEX1 n
     PeerExchangeGet2 n -> peerExchangeGet PEX2 n
@@ -110,9 +109,6 @@ peerExchangeProto pexFilt  msg = do
 
       debug $ "PeerExchangeGet" <+> "from" <+> pretty that
 
-      pl   <- getPeerLocator @e
-      pips <- knownPeers @e pl >>= pexFilt
-
       case pex of
         PEX1 -> do
           pa <- take defPexMaxPeers <$> getAllPex1Peers
@@ -131,7 +127,7 @@ getAllPex1Peers :: forall e m .
   => m [IPAddrPort L4Proto]
 getAllPex1Peers = do
     pl   <- getPeerLocator @e
-    pips <- knownPeers @e pl
+    pips <- knownPeersForPEX @e pl
     -- TODO: tcp-peer-support-in-pex
     pa' <- forM pips $ \p -> do
                 auth <- find (KnownPeerKey p) id <&> isJust
@@ -143,7 +139,6 @@ getAllPex1Peers = do
 
 type PexInfoContext e m = ( Sessions e (KnownPeer e) m
                           , HasPeerLocator L4Proto m
-                          -- , Expired e (
                           )
 
 getAllPex2Peers :: forall e m .
@@ -154,12 +149,9 @@ getAllPex2Peers :: forall e m .
   => m [PeerAddr L4Proto]
 getAllPex2Peers = do
     pl   <- getPeerLocator @e
-    pips <- knownPeers @e pl
-    pa' <- forM pips $ \p -> do
-                auth <- find (KnownPeerKey p) id
-                maybe1 auth (pure mempty) ( const $ fmap L.singleton (toPeerAddr p) )
-    -- FIXME: asap-random-shuffle-peers
-    pure $ mconcat pa'
+    pips <- knownPeersForPEX @e pl
+    -- FIXME: random-shuffle
+    forM pips toPeerAddr
 
 newtype instance SessionKey e (PeerExchange e) =
   PeerExchangeKey (Nonce (PeerExchange e))
diff --git a/hbs2-peer/app/Bootstrap.hs b/hbs2-peer/app/Bootstrap.hs
index b05ea6c7..9b307f48 100644
--- a/hbs2-peer/app/Bootstrap.hs
+++ b/hbs2-peer/app/Bootstrap.hs
@@ -8,6 +8,7 @@ import HBS2.Net.Proto.Types
 import HBS2.Net.Proto.Peer
 import HBS2.Clock
 import HBS2.Net.Proto.Sessions
+import HBS2.Peer.Brains
 
 import PeerConfig
 import HBS2.System.Logger.Simple
@@ -19,6 +20,7 @@ import Data.Foldable
 import Data.Maybe
 import Data.Set qualified as Set
 import Data.Set (Set)
+import Data.List qualified as List
 import Control.Monad.Trans.Maybe
 
 
@@ -82,8 +84,10 @@ knownPeersPingLoop :: forall e m . ( HasPeer e
                                    , Pretty (Peer e)
                                    , e ~ L4Proto
                                    , MonadIO m)
-                   => PeerConfig -> m ()
-knownPeersPingLoop (PeerConfig syn) = do
+                   => PeerConfig
+                   -> SomeBrains e
+                   -> m ()
+knownPeersPingLoop (PeerConfig syn) brains = do
   -- FIXME: add validation and error handling
   -- FIXME: tcp-addr-support-2
   let parseKnownPeers xs = do
@@ -91,8 +95,17 @@ knownPeersPingLoop (PeerConfig syn) = do
         mapM fromPeerAddr pa
 
   let them = runReader (cfgValue @PeerKnownPeer) syn & Set.toList
-  knownPeers' <- liftIO $ parseKnownPeers them
-  forever do
-    forM_ knownPeers' (sendPing @e)
-    pause @'Minutes 20
+
+  pex <- listPexInfo @e brains >>= liftIO . mapM fromPeerAddr
+
+  knownPeers' <- liftIO $ parseKnownPeers them
+
+  let pips = List.nub (knownPeers' <> pex)
+
+  forever do
+    forM_ pips (sendPing @e)
+    pause @'Minutes 10
+
+
+
 
diff --git a/hbs2-peer/app/Brains.hs b/hbs2-peer/app/Brains.hs
index 55e51551..bc512f7f 100644
--- a/hbs2-peer/app/Brains.hs
+++ b/hbs2-peer/app/Brains.hs
@@ -107,6 +107,10 @@ instance ( Hashable (Peer e)
 
   listDownloads = liftIO . selectDownloads
 
+  listPexInfo = liftIO . selectPexInfo
+
+  updatePexInfo b pex = updateOP b $ insertPexInfo b pex
+
   delDownload br what  = do
     liftIO $ Cache.insert (view brainsRemoved br) what ()
     updateOP br (deleteDownload br what)
@@ -544,6 +548,7 @@ SAVEPOINT zzz1;
 DELETE FROM ancestors WHERE strftime('%s','now') - strftime('%s', ts) > 600;
 DELETE FROM seenby WHERE strftime('%s','now') - strftime('%s', ts) > 600;
 DELETE FROM blocksize WHERE strftime('%s','now') - strftime('%s', ts) > 300;
+DELETE FROM statedb.pexinfo where seen <  datetime('now', '-7 days');
 
 RELEASE SAVEPOINT zzz1;
 
@@ -655,6 +660,33 @@ selectDownloads br = do
 
 ---
 
+insertPexInfo :: forall e  . ( e ~ L4Proto)
+               => BasicBrains e
+               -> [PeerAddr e]
+               -> IO ()
+insertPexInfo br peers = liftIO do
+  let conn = view brainsDb br
+  forM_ peers $ \p -> do
+    execute conn [qc|
+    insert into statedb.pexinfo (peer)
+    values(?)
+    on conflict (peer)
+      do update set seen =  datetime('now','localtime')
+    |] (Only (show $ pretty p))
+
+
+selectPexInfo :: forall e . (e ~ L4Proto)
+              => BasicBrains e
+              -> IO [PeerAddr e]
+selectPexInfo br = liftIO do
+  let conn = view brainsDb br
+  query_ conn [qc|
+    select peer from statedb.pexinfo where seen >= datetime('now', '-7 days')
+    order by seen desc
+    limit 100
+  |] <&> fmap (fromStringMay . fromOnly)
+     <&> catMaybes
+
 -- FIXME: eventually-close-db
 newBasicBrains :: forall e m . (Hashable (Peer e), MonadIO m)
                => PeerConfig
@@ -693,6 +725,13 @@ newBasicBrains cfg = liftIO do
     );
   |]
 
+  execute_ conn [qc|
+  create table if not exists statedb.pexinfo
+    ( peer    text not null primary key
+    , seen    DATE DEFAULT (datetime('now','localtime'))
+    );
+  |]
+
   execute_ conn [qc|
     create table if not exists ancestors
     ( child text not null
diff --git a/hbs2-peer/app/BrainyPeerLocator.hs b/hbs2-peer/app/BrainyPeerLocator.hs
new file mode 100644
index 00000000..ebcdf649
--- /dev/null
+++ b/hbs2-peer/app/BrainyPeerLocator.hs
@@ -0,0 +1,81 @@
+{-# Language UndecidableInstances #-}
+module BrainyPeerLocator
+  ( BrainyPeerLocator
+  , newBrainyPeerLocator
+  ) where
+
+
+import HBS2.Prelude
+import HBS2.Net.Proto
+import HBS2.Net.PeerLocator
+import HBS2.Peer.Brains
+
+import Control.Concurrent.STM
+import Data.Set (Set)
+import Data.Set qualified as Set
+
+
+data BrainyPeerLocator =
+  BrainyPeerLocator
+  { brains  :: SomeBrains L4Proto
+  , include :: TVar (Set (Peer L4Proto))
+  , exclude :: TVar (Set (Peer L4Proto))
+  }
+
+newBrainyPeerLocator :: forall e m . (Ord (Peer e), HasPeer e, e ~ L4Proto, MonadIO m)
+                     => SomeBrains e
+                     -> [Peer e]
+                     -> m BrainyPeerLocator
+
+newBrainyPeerLocator brains seeds = do
+  tv  <- liftIO $ newTVarIO (Set.fromList seeds)
+  tv2 <- liftIO $ newTVarIO mempty
+  pure $ BrainyPeerLocator brains tv tv2
+
+instance (Ord (Peer L4Proto), Pretty (Peer L4Proto)) => PeerLocator L4Proto BrainyPeerLocator where
+
+  knownPeers (BrainyPeerLocator br peers e) = do
+
+
+    ps <- liftIO $ readTVarIO peers
+
+    excl <- liftIO $ readTVarIO e
+    pure $ Set.toList (ps `Set.difference` excl)
+
+  knownPeersForPEX l@(BrainyPeerLocator br _ e) = do
+
+    excl <- liftIO $ readTVarIO e
+
+    pips <- knownPeers @L4Proto l
+            <&> filter udpOnly
+            <&> Set.fromList
+
+    tcp <- listTCPPexCandidates @L4Proto br
+             >>= liftIO . mapM (fromPeerAddr @L4Proto)
+             <&> Set.fromList
+
+    let what = Set.toList ( (pips <> tcp) `Set.difference` excl)
+
+    addr <- liftIO $ mapM (toPeerAddr @L4Proto) what
+
+    updatePexInfo br addr
+
+    pure what
+
+    where
+      udpOnly = \case
+        (PeerL4 UDP _) -> True
+        _              -> False
+
+
+  addPeers (BrainyPeerLocator _ peers te) new = do
+    excl <- liftIO $ readTVarIO te
+    liftIO $ atomically $ modifyTVar' peers ((`Set.difference` excl) . (<> Set.fromList new))
+
+  delPeers (BrainyPeerLocator _ peers _) del = do
+    liftIO $ atomically $ modifyTVar' peers (`Set.difference` Set.fromList del)
+
+  addExcluded p excl = do
+    liftIO $ atomically $ modifyTVar' (exclude p)  (<> Set.fromList excl)
+
+  bestPeers = knownPeers
diff --git a/hbs2-peer/app/PeerMain.hs b/hbs2-peer/app/PeerMain.hs
index 3ec7dc03..05374bf0 100644
--- a/hbs2-peer/app/PeerMain.hs
+++ b/hbs2-peer/app/PeerMain.hs
@@ -42,6 +42,7 @@ import HBS2.Data.Detect
 import HBS2.System.Logger.Simple hiding (info)
 
 import Brains
+import BrainyPeerLocator
 import PeerTypes
 import BlockDownload
 import CheckBlockAnnounce (checkBlockAnnounce)
@@ -640,6 +641,8 @@ runPeer opts = U.handle (\e -> myException e
 
   denv <- newDownloadEnv brains
 
+  pl <- AnyPeerLocator <$> newBrainyPeerLocator @e (SomeBrains @e brains) mempty
+
   let addr' = fromStringMay @(PeerAddr L4Proto) tcpListen
 
   trace $ "TCP addr:" <+> pretty tcpListen <+> pretty addr'
@@ -683,7 +686,7 @@ runPeer opts = U.handle (\e -> myException e
                       peer
 
           }
-      penv <- newPeerEnv (AnyStorage s) (Fabriq proxy) (getOwnPeer mess)
+      penv <- newPeerEnv pl (AnyStorage s) (Fabriq proxy) (getOwnPeer mess)
       pure (proxy, penv)
 
   proxyThread <- async $ runProxyMessaging proxy
@@ -708,15 +711,6 @@ runPeer opts = U.handle (\e -> myException e
 
   rcw <- async $ liftIO $ runRefChanRelyWorker rce refChanAdapter
 
-  let pexFilt pips = do
-        tcpex <- listTCPPexCandidates @e brains -- <&> HashSet.fromList
-        pips2 <- filter onlyUDP <$> mapM toPeerAddr pips
-        mapM fromPeerAddr (L.nub (pips2  <> tcpex))
-        where
-          onlyUDP = \case
-            (L4Address UDP _) -> True
-            _                 -> False
-
   let onNoBlock (p, h) = do
         already <- liftIO $ Cache.lookup nbcache (p,h) <&> isJust
         unless already do
@@ -949,7 +943,7 @@ runPeer opts = U.handle (\e -> myException e
 
                 peerThread "peerPingLoop" (peerPingLoop @e conf penv)
 
-                peerThread "knownPeersPingLoop" (knownPeersPingLoop @e conf)
+                peerThread "knownPeersPingLoop" (knownPeersPingLoop @e conf (SomeBrains brains))
 
                 peerThread "bootstrapDnsLoop" (bootstrapDnsLoop @e conf)
 
@@ -978,7 +972,7 @@ runPeer opts = U.handle (\e -> myException e
                     , makeResponse blockAnnounceProto
                     , makeResponse (withCredentials @e pc . peerHandShakeProto hshakeAdapter penv)
                     , makeResponse (withCredentials @e pc . encryptionHandshakeProto encryptionHshakeAdapter)
-                    , makeResponse (peerExchangeProto pexFilt)
+                    , makeResponse peerExchangeProto
                     , makeResponse refLogUpdateProto
                     , makeResponse (refLogRequestProto reflogReqAdapter)
                     , makeResponse (peerMetaProto peerMeta)
@@ -1028,7 +1022,7 @@ runPeer opts = U.handle (\e -> myException e
           runMaybeT do
             lift $ runResponseM me $ refChanNotifyProto @e True refChanAdapter (Notify @e puk box)
 
-  menv <- newPeerEnv (AnyStorage s) (Fabriq mcast) (getOwnPeer mcast)
+  menv <- newPeerEnv pl (AnyStorage s) (Fabriq mcast) (getOwnPeer mcast)
 
   ann <- liftIO $ async $ runPeerM menv $ do
 
diff --git a/hbs2-peer/hbs2-peer.cabal b/hbs2-peer/hbs2-peer.cabal
index 6afa7e3f..d147be7d 100644
--- a/hbs2-peer/hbs2-peer.cabal
+++ b/hbs2-peer/hbs2-peer.cabal
@@ -154,6 +154,7 @@ executable hbs2-peer
 
     other-modules:
                       BlockDownload
+                    , BrainyPeerLocator
                     , DownloadQ
                     , DownloadMon
                     , EncryptionKeys
diff --git a/hbs2-peer/lib/HBS2/Peer/Brains.hs b/hbs2-peer/lib/HBS2/Peer/Brains.hs
index 713087dc..d5641c16 100644
--- a/hbs2-peer/lib/HBS2/Peer/Brains.hs
+++ b/hbs2-peer/lib/HBS2/Peer/Brains.hs
@@ -43,6 +43,12 @@ class HasBrains e a where
   listTCPPexCandidates :: MonadIO m => a -> m [PeerAddr e]
   listTCPPexCandidates _ = pure mempty
 
+  listPexInfo :: MonadIO m => a -> m [PeerAddr e]
+  listPexInfo _ = pure mempty
+
+  updatePexInfo :: MonadIO m => a -> [PeerAddr e] -> m ()
+  updatePexInfo _ _ = pure ()
+
   listDownloads :: MonadIO m => a -> m [(HashRef, Integer)]
   listDownloads _ = pure mempty
 
@@ -154,6 +160,9 @@ instance HasBrains e (SomeBrains e) where
   setActiveTCPSessions (SomeBrains a) = setActiveTCPSessions @e a
   listTCPPexCandidates (SomeBrains a) = listTCPPexCandidates @e a
 
+  listPexInfo (SomeBrains a) = listPexInfo @e a
+  updatePexInfo (SomeBrains a) = updatePexInfo @e a
+
   listDownloads (SomeBrains a) = listDownloads @e a
   delDownload (SomeBrains a) = delDownload @e a