diff --git a/src/api/messages.js b/src/api/messages.js
index ce5130e..790a851 100644
--- a/src/api/messages.js
+++ b/src/api/messages.js
@@ -4,7 +4,7 @@ import {DEFAULT_SERVER} from './base'
 export async function get_messages(
     { api_server = DEFAULT_SERVER, pagination = 200, page=1,
       message_type = null, content_types = null,
-      refs = null, addresses = null, tags = null, hashes = null} = {}) {
+      refs = null, addresses = null, tags = null, hashes = null, channels = null, start_date = null, end_date = null} = {}) {
     let params = {
       'pagination': pagination,
       'page': page
@@ -27,6 +27,15 @@ export async function get_messages(
   
     if (hashes !== null)
       params.hashes = hashes.join(',')
+    
+    if (channels != null)
+      params.channels = channels.join(',')
+  
+    if (start_date !== null)
+      params.startDate = start_date
+    
+    if (end_date !== null)
+      params.endDate = end_date
   
     let response = await axios.get(`${api_server}/api/v0/messages.json`, {
       'params': params
diff --git a/src/api/posts.js b/src/api/posts.js
index 9fb0501..f21ac8e 100644
--- a/src/api/posts.js
+++ b/src/api/posts.js
@@ -7,7 +7,7 @@ const shajs = require('sha.js')
 export async function get_posts(
   types, {
     api_server = DEFAULT_SERVER, pagination = 200, page=1,
-    refs = null, addresses = null, tags = null, hashes = null} = {}) {
+    refs = null, addresses = null, tags = null, hashes = null, channels = null, start_date = null, end_date = null} = {}) {
   let params = {
     'types': types,
     'pagination': pagination,
@@ -26,6 +26,15 @@ export async function get_posts(
   if (hashes !== null)
     params.hashes = hashes.join(',')
 
+  if (channels != null)
+    params.channels = channels.join(',')
+
+  if (start_date !== null)
+    params.startDate = start_date
+  
+  if (end_date !== null)
+    params.endDate = end_date
+
   let response = await axios.get(`${api_server}/api/v0/posts.json`, {
     'params': params
   })