diff --git a/src/main/java/com/algorand/algosdk/v2/client/algod/GetBlockHeader.java b/src/main/java/com/algorand/algosdk/v2/client/algod/GetBlockHeader.java
new file mode 100644
index 000000000..db072ead8
--- /dev/null
+++ b/src/main/java/com/algorand/algosdk/v2/client/algod/GetBlockHeader.java
@@ -0,0 +1,66 @@
+package com.algorand.algosdk.v2.client.algod;
+
+import com.algorand.algosdk.v2.client.common.Client;
+import com.algorand.algosdk.v2.client.common.HttpMethod;
+import com.algorand.algosdk.v2.client.common.Query;
+import com.algorand.algosdk.v2.client.common.QueryData;
+import com.algorand.algosdk.v2.client.common.Response;
+import com.algorand.algosdk.v2.client.model.BlockHeaderResponse;
+
+
+/**
+ * Get the block header for the block on the given round.
+ * /v2/blocks/{round}/header
+ */
+public class GetBlockHeader extends Query {
+
+    private Long round;
+
+    /**
+     * @param round The round from which to fetch block header information.
+     */
+    public GetBlockHeader(Client client, Long round) {
+        super(client, new HttpMethod("get"));
+        addQuery("format", "msgpack");
+        this.round = round;
+    }
+
+   /**
+    * Execute the query.
+    * @return the query response object.
+    * @throws Exception
+    */
+    @Override
+    public Response<BlockHeaderResponse> execute() throws Exception {
+        Response<BlockHeaderResponse> resp = baseExecute();
+        resp.setValueType(BlockHeaderResponse.class);
+        return resp;
+    }
+
+   /**
+    * Execute the query with custom headers, there must be an equal number of keys and values
+    * or else an error will be generated.
+    * @param headers an array of header keys
+    * @param values an array of header values
+    * @return the query response object.
+    * @throws Exception
+    */
+    @Override
+    public Response<BlockHeaderResponse> execute(String[] headers, String[] values) throws Exception {
+        Response<BlockHeaderResponse> resp = baseExecute(headers, values);
+        resp.setValueType(BlockHeaderResponse.class);
+        return resp;
+    }
+
+    protected QueryData getRequestString() {
+        if (this.round == null) {
+            throw new RuntimeException("round is not set. It is a required parameter.");
+        }
+        addPathSegment(String.valueOf("v2"));
+        addPathSegment(String.valueOf("blocks"));
+        addPathSegment(String.valueOf(round));
+        addPathSegment(String.valueOf("header"));
+
+        return qd;
+    }
+}
diff --git a/src/main/java/com/algorand/algosdk/v2/client/common/AlgodClient.java b/src/main/java/com/algorand/algosdk/v2/client/common/AlgodClient.java
index 813479cf0..94a22dfd9 100644
--- a/src/main/java/com/algorand/algosdk/v2/client/common/AlgodClient.java
+++ b/src/main/java/com/algorand/algosdk/v2/client/common/AlgodClient.java
@@ -13,6 +13,7 @@
 import com.algorand.algosdk.v2.client.algod.GetBlock;
 import com.algorand.algosdk.v2.client.algod.GetBlockTxids;
 import com.algorand.algosdk.v2.client.algod.GetBlockHash;
+import com.algorand.algosdk.v2.client.algod.GetBlockHeader;
 import com.algorand.algosdk.v2.client.algod.GetTransactionProof;
 import com.algorand.algosdk.v2.client.algod.GetBlockLogs;
 import com.algorand.algosdk.v2.client.algod.GetSupply;
@@ -180,6 +181,14 @@ public GetBlockHash GetBlockHash(Long round) {
         return new GetBlockHash((Client) this, round);
     }
 
+    /**
+     * Get the block header for the block on the given round.
+     * /v2/blocks/{round}/header
+     */
+    public GetBlockHeader GetBlockHeader(Long round) {
+        return new GetBlockHeader((Client) this, round);
+    }
+
     /**
      * Get a proof for a transaction in a block.
      * /v2/blocks/{round}/transactions/{txid}/proof
diff --git a/src/main/java/com/algorand/algosdk/v2/client/indexer/LookupAccountByID.java b/src/main/java/com/algorand/algosdk/v2/client/indexer/LookupAccountByID.java
index fc760b3ce..375b8dd5d 100644
--- a/src/main/java/com/algorand/algosdk/v2/client/indexer/LookupAccountByID.java
+++ b/src/main/java/com/algorand/algosdk/v2/client/indexer/LookupAccountByID.java
@@ -50,7 +50,8 @@ public LookupAccountByID includeAll(Boolean includeAll) {
     }
 
     /**
-     * Include results for the specified round.
+     * Deprecated and disallowed. This parameter used to include results for a
+     * specified round. Requests with this parameter set are now rejected.
      */
     public LookupAccountByID round(Long round) {
         addQuery("round", String.valueOf(round));
diff --git a/src/main/java/com/algorand/algosdk/v2/client/indexer/SearchForAccounts.java b/src/main/java/com/algorand/algosdk/v2/client/indexer/SearchForAccounts.java
index d67db48a1..93efd9e3d 100644
--- a/src/main/java/com/algorand/algosdk/v2/client/indexer/SearchForAccounts.java
+++ b/src/main/java/com/algorand/algosdk/v2/client/indexer/SearchForAccounts.java
@@ -104,11 +104,8 @@ public SearchForAccounts next(String next) {
     }
 
     /**
-     * Include results for the specified round. For performance reasons, this parameter
-     * may be disabled on some configurations. Using application-id or asset-id filters
-     * will return both creator and opt-in accounts. Filtering by include-all will
-     * return creator and opt-in accounts for deleted assets and accounts. Non-opt-in
-     * managers are not included in the results when asset-id is used.
+     * Deprecated and disallowed. This parameter used to include results for a
+     * specified round. Requests with this parameter set are now rejected.
      */
     public SearchForAccounts round(Long round) {
         addQuery("round", String.valueOf(round));
diff --git a/src/main/java/com/algorand/algosdk/v2/client/model/BlockHeaderResponse.java b/src/main/java/com/algorand/algosdk/v2/client/model/BlockHeaderResponse.java
new file mode 100644
index 000000000..3576edece
--- /dev/null
+++ b/src/main/java/com/algorand/algosdk/v2/client/model/BlockHeaderResponse.java
@@ -0,0 +1,31 @@
+package com.algorand.algosdk.v2.client.model;
+
+import java.util.HashMap;
+import java.util.Objects;
+
+import com.algorand.algosdk.v2.client.common.PathResponse;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Block header.
+ */
+public class BlockHeaderResponse extends PathResponse {
+
+    /**
+     * Block header data.
+     */
+    @JsonProperty("blockHeader")
+    public HashMap<String,Object> blockHeader;
+
+    @Override
+    public boolean equals(Object o) {
+
+        if (this == o) return true;
+        if (o == null) return false;
+
+        BlockHeaderResponse other = (BlockHeaderResponse) o;
+        if (!Objects.deepEquals(this.blockHeader, other.blockHeader)) return false;
+
+        return true;
+    }
+}