diff --git a/common/src/main/java/org/opensearch/ml/common/input/MLInput.java b/common/src/main/java/org/opensearch/ml/common/input/MLInput.java
index 574f13e9c3..cb79328427 100644
--- a/common/src/main/java/org/opensearch/ml/common/input/MLInput.java
+++ b/common/src/main/java/org/opensearch/ml/common/input/MLInput.java
@@ -56,6 +56,11 @@ public class MLInput implements Input {
     // Input text sentences for text embedding model
     public static final String TEXT_DOCS_FIELD = "text_docs";
 
+    // Input context docs for question answering model
+    public static final String CONTEXT_DOCS = "context_docs";
+    // Input list of questions for question answering model
+    public static final String QUESTIONS_LIST = "questions_list";
+
     // Algorithm name
     protected FunctionName algorithm;
     // ML algorithm parameters
diff --git a/common/src/main/java/org/opensearch/ml/common/input/nlp/QuestionAnswerMLInput.java b/common/src/main/java/org/opensearch/ml/common/input/nlp/QuestionAnswerMLInput.java
index d9c553855f..493116cb8b 100644
--- a/common/src/main/java/org/opensearch/ml/common/input/nlp/QuestionAnswerMLInput.java
+++ b/common/src/main/java/org/opensearch/ml/common/input/nlp/QuestionAnswerMLInput.java
@@ -1,12 +1,19 @@
 package org.opensearch.ml.common.input.nlp;
 
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.core.common.io.stream.StreamOutput;
+import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.core.xcontent.XContentParser;
 import org.opensearch.ml.common.FunctionName;
 import org.opensearch.ml.common.dataset.MLInputDataset;
+import org.opensearch.ml.common.dataset.QuestionAnswerInputDataSet;
 import org.opensearch.ml.common.input.MLInput;
+import static org.opensearch.core.xcontent.XContentParserUtils.ensureExpectedToken;
+
 
 @org.opensearch.ml.common.annotation.MLInput(functionNames=FunctionName.QUESTION_ANSWER)
 public class QuestionAnswerMLInput extends MLInput {
@@ -22,4 +29,63 @@ public QuestionAnswerMLInput(StreamInput input) throws IOException {
     public void writeTo(StreamOutput output) throws IOException {
         super.writeTo(output);
     }
+
+     @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.field(ALGORITHM_FIELD, algorithm.name());
+        if(parameters != null) {
+            builder.field(ML_PARAMETERS_FIELD, parameters);
+        }
+        if(inputDataset != null) {
+            QuestionAnswerInputDataSet ds = (QuestionAnswerInputDataSet) this.inputDataset;
+            List<String> questionsList = ds.getQuestionsList();
+            String contextDoc = ds.getContextDocs();
+            builder.field(CONTEXT_DOCS, contextDoc);
+            if (questionsList != null && !questionsList.isEmpty()) {
+                builder.startArray(QUESTIONS_LIST);
+                for(String d : questionsList) {
+                    builder.value(d);
+                }
+                builder.endArray();
+            }
+        }
+        builder.endObject();
+        return builder;
+    }
+
+     public QuestionAnswerMLInput(XContentParser parser, FunctionName functionName) throws IOException {
+        super();
+        this.algorithm = functionName;
+        List<String> questionsList = new ArrayList<>();
+        String contextDoc = null;
+
+        ensureExpectedToken(XContentParser.Token.START_OBJECT, parser.currentToken(), parser);
+        while (parser.nextToken() != XContentParser.Token.END_OBJECT) {
+            String fieldName = parser.currentName();
+            parser.nextToken();
+
+            switch (fieldName) {
+                case QUESTIONS_LIST:
+                    ensureExpectedToken(XContentParser.Token.START_ARRAY, parser.currentToken(), parser);
+                    while (parser.nextToken() != XContentParser.Token.END_ARRAY) {
+                        String context = parser.text();
+                        questionsList.add(context);
+                    }
+                    break;
+                case CONTEXT_DOCS: 
+                    contextDoc = parser.text();
+                default:
+                    parser.skipChildren();
+                    break;
+            }
+        }        
+        if(questionsList.isEmpty()) {
+            throw new IllegalArgumentException("No question list");
+        }
+        if(contextDoc == null) {
+            throw new IllegalArgumentException("No context documents");
+        }
+        inputDataset = new QuestionAnswerInputDataSet(contextDoc, questionsList);
+    }
 }