diff --git a/financial-agent/agent/index_nevermined.ts b/financial-agent/agent/index_nevermined.ts
index 84226c6..b433481 100644
--- a/financial-agent/agent/index_nevermined.ts
+++ b/financial-agent/agent/index_nevermined.ts
@@ -151,7 +151,7 @@ function createModelWithSessionId(
   customProperties: Record<string, string> = {}
 ): ChatOpenAI {
   return new ChatOpenAI(
-    payments.observability.withHeliconeLangchain(
+    payments.observability.withLangchain(
       "gpt-4o-mini",
       OPENAI_API_KEY,
       agentRequest,
@@ -172,7 +172,7 @@ async function ensureAuthorized(
   const authHeader = (req.headers["authorization"] || "") as string;
   const requestedUrl = `${NVM_AGENT_HOST}${req.url}`;
   const httpVerb = req.method;
-  const result = await payments.requests.startProcessingRequest(
+  const result = await payments.requests.startProcessingBatchRequest(
     NVM_AGENT_ID,
     authHeader,
     requestedUrl,
@@ -201,8 +201,9 @@ app.post("/ask", async (req: Request, res: Response) => {
     const { agentRequest, requestAccessToken } = await ensureAuthorized(req);
     console.log("agentRequestId", agentRequest.agentRequestId);
     console.log("requestAccessToken", requestAccessToken);
-    const input = String(req.body?.input_query ?? "").trim();
-    if (!input) return res.status(400).json({ error: "Missing input" });
+    const inputs = req.body?.input_query ?? [];
+    if (!inputs || !Array.isArray(inputs) || inputs.length === 0)
+      return res.status(400).json({ error: "Missing input" });
 
     let { sessionId } = req.body as { sessionId?: string };
     if (!sessionId) sessionId = crypto.randomUUID();
@@ -211,25 +212,29 @@ app.post("/ask", async (req: Request, res: Response) => {
     const model = createModelWithSessionId(agentRequest);
     const runnable = createRunnable(model);
 
-    const result = await runnable.invoke(
-      { input },
-      { configurable: { sessionId } }
-    );
-    const text =
-      result?.content ??
-      (Array.isArray(result)
-        ? result.map((m: any) => m.content).join("\n")
-        : String(result));
-
+    let outputs = [];
+    for (const input of inputs) {
+      console.log("Sending question to the agent", input);
+      const result = await runnable.invoke(
+        { input },
+        { configurable: { sessionId } }
+      );
+      const text =
+        result?.content ??
+        (Array.isArray(result)
+          ? result.map((m: any) => m.content).join("\n")
+          : String(result));
+      outputs.push(text);
+    }
     // After successful processing, redeem 1 credit for this request
     let redemptionResult: any;
     try {
-      redemptionResult = await payments.requests.redeemCreditsFromRequest(
+      redemptionResult = await payments.requests.redeemCreditsFromBatchRequest(
         agentRequest.agentRequestId,
         requestAccessToken,
-        1n
+        BigInt(inputs.length)
       );
-      redemptionResult.creditsRedeemed = 1;
+      redemptionResult.creditsRedeemed = inputs.length;
       console.log("redemptionResult", redemptionResult);
     } catch (redeemErr) {
       // eslint-disable-next-line no-console
@@ -240,7 +245,7 @@ app.post("/ask", async (req: Request, res: Response) => {
       };
     }
 
-    res.json({ output: text, sessionId, redemptionResult });
+    res.json({ output: outputs, sessionId, redemptionResult });
   } catch (error: any) {
     // eslint-disable-next-line no-console
     console.error("Error handling /ask", error);
diff --git a/financial-agent/client/index_nevermined.ts b/financial-agent/client/index_nevermined.ts
index 0409718..9c8fb8e 100644
--- a/financial-agent/client/index_nevermined.ts
+++ b/financial-agent/client/index_nevermined.ts
@@ -44,15 +44,11 @@ async function main(): Promise<void> {
     nvmEnv,
   });
 
-  for (let i = 0; i < questions.length; i += 1) {
-    const input = questions[i];
-    // eslint-disable-next-line no-console
-    console.log(`\n[CLIENT] Sending question ${i + 1}: ${input}`);
-    const response = await askAgent(baseUrl, input, sessionId, bearer);
-    sessionId = response.sessionId;
-    // eslint-disable-next-line no-console
-    console.log(`[AGENT] (sessionId=${sessionId})\n${response.output}`);
-  }
+  console.log("Sending batch of questions to the agent");
+  console.table(questions);
+  const responses = await askAgent(baseUrl, questions, sessionId, bearer);
+  console.log("Received responses from the agent");
+  console.log(responses.output);
 }
 
 /**
@@ -65,17 +61,17 @@ async function main(): Promise<void> {
  */
 async function askAgent(
   baseUrl: string,
-  input: string,
+  inputs: string[],
   sessionId?: string,
   bearer?: string
-): Promise<{ output: string; sessionId: string }> {
+): Promise<{ output: string[]; sessionId: string }> {
   const res = await fetch(`${baseUrl}/ask`, {
     method: "POST",
     headers: {
       "Content-Type": "application/json",
       ...(bearer ? { Authorization: `Bearer ${bearer}` } : {}),
     },
-    body: JSON.stringify({ input_query: input, sessionId }),
+    body: JSON.stringify({ input_query: inputs, sessionId }),
   });
   if (!res.ok) {
     const errorText = await res.text().catch(() => "");
@@ -83,7 +79,7 @@ async function askAgent(
       `Agent request failed: ${res.status} ${res.statusText} ${errorText}`
     );
   }
-  const data = (await res.json()) as { output: string; sessionId: string };
+  const data = (await res.json()) as { output: string[]; sessionId: string };
   return data;
 }
 
diff --git a/financial-agent/package-lock.json b/financial-agent/package-lock.json
index 86c0cdb..60a3eda 100644
--- a/financial-agent/package-lock.json
+++ b/financial-agent/package-lock.json
@@ -10,7 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@langchain/openai": "^0.3.10",
-        "@nevermined-io/payments": "^1.0.0-rc14",
+        "@nevermined-io/payments": "^1.0.0-rc16",
         "dotenv": "^16.4.5",
         "express": "^4.19.2",
         "langchain": "^0.2.14"
@@ -24,7 +24,7 @@
     },
     "../../payments": {
       "name": "@nevermined-io/payments",
-      "version": "1.0.0-rc14",
+      "version": "1.0.0-rc16",
       "license": "Apache-2.0",
       "dependencies": {
         "@a2a-js/sdk": "^0.2.5",
diff --git a/financial-agent/package.json b/financial-agent/package.json
index e8b535f..ca23c96 100644
--- a/financial-agent/package.json
+++ b/financial-agent/package.json
@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "@langchain/openai": "^0.3.10",
-    "@nevermined-io/payments": "^1.0.0-rc14",
+    "@nevermined-io/payments": "^1.0.0-rc19",
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
     "langchain": "^0.2.14"