diff --git a/acceptreject.py b/acceptreject.py
index fe25ec782..435af832c 100644
--- a/acceptreject.py
+++ b/acceptreject.py
@@ -40,6 +40,7 @@ def createAcceptReject(baseDir: str,federationList: [], \
                 domain=domain+':'+str(port)
 
     newAccept = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': acceptType,
         'actor': httpPrefix+'://'+domain+'/users/'+nickname,
         'to': [toUrl],
diff --git a/announce.py b/announce.py
index d3577adba..ee202576f 100644
--- a/announce.py
+++ b/announce.py
@@ -119,6 +119,7 @@ def updateAnnounceCollection(postFilename: str,actor: str,debug: bool) -> None:
             if debug:
                 print('DEBUG: Adding initial shares (announcements) to '+postUrl)
             announcementsJson = {
+                "@context": "https://www.w3.org/ns/activitystreams",
                 'id': postUrl,
                 'type': 'Collection',
                 "totalItems": 1,
@@ -195,6 +196,7 @@ def createAnnounce(session,baseDir: str,federationList: [], \
     newAnnounceId= \
         httpPrefix+'://'+fullDomain+'/users/'+nickname+'/statuses/'+statusNumber
     newAnnounce = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'actor': httpPrefix+'://'+fullDomain+'/users/'+nickname,
         'atomUri': httpPrefix+'://'+fullDomain+'/users/'+nickname+'/statuses/'+statusNumber,
         'cc': [],
@@ -307,6 +309,7 @@ def undoAnnounce(session,baseDir: str,federationList: [], \
                 fullDomain=domain+':'+str(port)
 
     newUndoAnnounce = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'actor': httpPrefix+'://'+fullDomain+'/users/'+nickname,
         'type': 'Undo',
         'cc': [],
@@ -416,6 +419,7 @@ def sendAnnounceViaServer(session,fromNickname: str,password: str,
     newAnnounceId= \
         httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname+'/statuses/'+statusNumber
     newAnnounceJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'actor': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname,
         'atomUri': newAnnounceId,
         'cc': [ccUrl],
diff --git a/blocking.py b/blocking.py
index b2adfac59..4a1497238 100644
--- a/blocking.py
+++ b/blocking.py
@@ -158,6 +158,7 @@ def sendBlockViaServer(session,fromNickname: str,password: str,
 
     blockActor=httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname
     newBlockJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Block',
         'actor': blockActor,
         'object': blockedUrl,
@@ -230,6 +231,7 @@ def sendUndoBlockViaServer(session,fromNickname: str,password: str,
 
     blockActor=httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname
     newBlockJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Undo',
         'actor': blockActor,
         'object': {
diff --git a/daemon.py b/daemon.py
index 13cc8b4d9..42292494c 100644
--- a/daemon.py
+++ b/daemon.py
@@ -875,6 +875,7 @@ class PubServer(BaseHTTPRequestHandler):
                     createSession(self.server.domain,self.server.port,self.server.useTor)
             undoAnnounceActor=self.server.httpPrefix+'://'+self.server.domainFull+'/users/'+self.postToNickname
             newUndoAnnounce = {
+                "@context": "https://www.w3.org/ns/activitystreams",
                 'actor': undoAnnounceActor,
                 'type': 'Undo',
                 'cc': [undoAnnounceActor+'/followers'],
@@ -942,6 +943,7 @@ class PubServer(BaseHTTPRequestHandler):
             likeActor=self.server.httpPrefix+'://'+self.server.domainFull+'/users/'+self.postToNickname
             actorLiked=likeUrl.split('/statuses/')[0]
             likeJson= {
+                "@context": "https://www.w3.org/ns/activitystreams",
                 'type': 'Like',
                 'actor': likeActor,
                 'object': likeUrl,
@@ -964,6 +966,7 @@ class PubServer(BaseHTTPRequestHandler):
             undoActor=self.server.httpPrefix+'://'+self.server.domainFull+'/users/'+self.postToNickname
             actorLiked=likeUrl.split('/statuses/')[0]
             undoLikeJson= {
+                "@context": "https://www.w3.org/ns/activitystreams",
                 'type': 'Undo',
                 'actor': undoActor,
                 'object': {
@@ -1001,6 +1004,7 @@ class PubServer(BaseHTTPRequestHandler):
                         createSession(self.server.domain,self.server.port,self.server.useTor)
                 deleteActor=self.server.httpPrefix+'://'+self.server.domainFull+'/users/'+self.postToNickname
                 deleteJson= {
+                    "@context": "https://www.w3.org/ns/activitystreams",
                     'actor': actor,
                     'object': deleteUrl,
                     'to': ['https://www.w3.org/ns/activitystreams#Public',actor],
diff --git a/delete.py b/delete.py
index 220166640..44db34bbf 100644
--- a/delete.py
+++ b/delete.py
@@ -51,6 +51,7 @@ def createDelete(session,baseDir: str,federationList: [], \
     newDeleteId= \
         httpPrefix+'://'+fullDomain+'/users/'+nickname+'/statuses/'+statusNumber
     newDelete = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'actor': httpPrefix+'://'+fullDomain+'/users/'+nickname,
         'atomUri': httpPrefix+'://'+fullDomain+'/users/'+nickname+'/statuses/'+statusNumber,
         'cc': [],
@@ -102,6 +103,7 @@ def sendDeleteViaServer(session,fromNickname: str,password: str,
     ccUrl = httpPrefix + '://'+fromDomainFull+'/users/'+fromNickname+'/followers'
 
     newDeleteJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'actor': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname,
         'cc': [ccUrl],
         'object': deleteObjectUrl,
diff --git a/like.py b/like.py
index 2619df89e..f4e2d0a5f 100644
--- a/like.py
+++ b/like.py
@@ -92,6 +92,7 @@ def updateLikesCollection(postFilename: str,objectUrl: str, actor: str,debug: bo
             if debug:
                 print('DEBUG: Adding initial likes to '+objectUrl)
             likesJson = {
+                "@context": "https://www.w3.org/ns/activitystreams",
                 'id': objectUrl,
                 'type': 'Collection',
                 "totalItems": 1,
@@ -147,6 +148,7 @@ def like(session,baseDir: str,federationList: [],nickname: str,domain: str,port:
         likeTo=[objectUrl.split('/statuses/')[0]]
 
     newLikeJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Like',
         'actor': httpPrefix+'://'+fullDomain+'/users/'+nickname,
         'object': objectUrl,
@@ -240,6 +242,7 @@ def undolike(session,baseDir: str,federationList: [],nickname: str,domain: str,p
         likeTo=[objectUrl.split('/statuses/')[0]]
 
     newUndoLikeJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Undo',
         'actor': httpPrefix+'://'+fullDomain+'/users/'+nickname,
         'object': {
@@ -338,6 +341,7 @@ def sendLikeViaServer(session,fromNickname: str,password: str,
         toUrl=[likeUrl.split('/statuses/')[0]]
     
     newLikeJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Like',
         'actor': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname,
         'object': likeUrl,
@@ -412,6 +416,7 @@ def sendUndoLikeViaServer(session,fromNickname: str,password: str,
         toUrl=[likeUrl.split('/statuses/')[0]]
 
     newUndoLikeJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Undo',
         'actor': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname,
         'object': {
diff --git a/posts.py b/posts.py
index 7ab2e0c3e..f7fd198a7 100644
--- a/posts.py
+++ b/posts.py
@@ -494,6 +494,7 @@ def createPostBase(baseDir: str,nickname: str, domain: str, port: int, \
                     capabilityIdList=[oc['id']]
 
         newPost = {
+            "@context": "https://www.w3.org/ns/activitystreams",
             'id': newPostId+'/activity',
             'capability': capabilityIdList,
             'type': 'Create',
@@ -539,6 +540,7 @@ def createPostBase(baseDir: str,nickname: str, domain: str, port: int, \
                             imageDescription,useBlurhash)            
     else:
         newPost = {
+            "@context": "https://www.w3.org/ns/activitystreams",
             'id': newPostId,
             'type': 'Note',
             'summary': summary,
@@ -619,6 +621,7 @@ def outboxMessageCreateWrap(httpPrefix: str, \
     # TODO
     capabilityUrl=[]
     newPost = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'id': newPostId+'/activity',
         'capability': capabilityUrl,
         'type': 'Create',
@@ -889,8 +892,8 @@ def threadSendPost(session,postJsonStr: str,federationList: [],\
     for attempt in range(20):
         postResult = \
             postJsonString(session,postJsonStr,federationList, \
-                        inboxUrl,signatureHeaderJson, \
-                        "inbox:write")
+                           inboxUrl,signatureHeaderJson, \
+                           "inbox:write",debug)
         if postResult:
             if debug:
                 print('DEBUG: json post to '+inboxUrl+' succeeded')
@@ -1102,7 +1105,7 @@ def sendPostViaServer(projectVersion: str, \
                'Content-type': 'application/json', \
                'Authorization': authHeader}
     postResult = \
-        postJsonString(session,json.dumps(postJsonObject),[],inboxUrl,headers,"inbox:write")
+        postJsonString(session,json.dumps(postJsonObject),[],inboxUrl,headers,"inbox:write",debug)
     #if not postResult:
     #    if debug:
     #        print('DEBUG: POST failed for c2s to '+inboxUrl)
diff --git a/session.py b/session.py
index 602f1a266..dd186f926 100644
--- a/session.py
+++ b/session.py
@@ -65,7 +65,12 @@ def postJson(session,postJsonObject: {},federationList: [],inboxUrl: str,headers
     postResult = session.post(url = inboxUrl, data = json.dumps(postJsonObject), headers=headers)
     return postResult.text
 
-def postJsonString(session,postJsonStr: str,federationList: [],inboxUrl: str,headers: {},capability: str) -> str:
+def postJsonString(session,postJsonStr: str, \
+                   federationList: [], \
+                   inboxUrl: str, \
+                   headers: {}, \
+                   capability: str, \
+                   debug: bool) -> str:
     """Post a json message string to the inbox of another person
     Supplying a capability, such as "inbox:write"
     NOTE: Here we post a string rather than the original json so that
@@ -77,7 +82,7 @@ def postJsonString(session,postJsonStr: str,federationList: [],inboxUrl: str,hea
     if not capability.startswith('cap'):    
         # check that we are posting to a permitted domain
         if not urlPermitted(inboxUrl,federationList,capability):
-            print('postJson: '+inboxUrl+' not permitted')
+            print('postJson: '+inboxUrl+' not permitted by capabilities')
             return None
 
     postResult = session.post(url = inboxUrl, data = postJsonStr, headers=headers)
diff --git a/shares.py b/shares.py
index 224095766..13004c8b9 100644
--- a/shares.py
+++ b/shares.py
@@ -296,6 +296,7 @@ def sendShareViaServer(session,fromNickname: str,password: str,
     ccUrl = httpPrefix + '://'+fromDomainFull+'/users/'+fromNickname+'/followers'
 
     newShareJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Add',
         'actor': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname,
         'target': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname+'/shares',
@@ -385,6 +386,7 @@ def sendUndoShareViaServer(session,fromNickname: str,password: str,
     ccUrl = httpPrefix + '://'+fromDomainFull+'/users/'+fromNickname+'/followers'
 
     undoShareJson = {
+        "@context": "https://www.w3.org/ns/activitystreams",
         'type': 'Remove',
         'actor': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname,
         'target': httpPrefix+'://'+fromDomainFull+'/users/'+fromNickname+'/shares',