Netlify Functions

This guide explains how to run VoltAgent on Netlify Functions by reusing the same Hono-powered HTTP API that the Cloudflare Workers example exposes. The instructions mirror the examples/with-netlify-functions project.

Prerequisites

• Node.js 20+
• pnpm or npm
• Netlify account and the netlify CLI (npm install -g netlify-cli)
• OpenAI API key (VoltOps keys optional)

1. Generate project files

Option A: VoltAgent CLI

npm run volt deploy --target netlify

The command scaffolds a netlify.toml file with function defaults. Add netlify/functions/voltagent.ts and a VoltAgent entry file (src/index.ts) following the example below.

Option B: Manual setup

1. Create netlify.toml (see sample in step 4).
2. Add netlify/functions/voltagent.ts with the Netlify handler.
3. Configure VoltAgent in src/index.ts and import it from the handler.

2. Environment variables

Netlify Functions expose secrets through process.env, so you can rely on VoltAgent's default environment detection. Use the CLI to define keys:

netlify secrets:set OPENAI_API_KEY
netlify secrets:set VOLTAGENT_PUBLIC_KEY
netlify secrets:set VOLTAGENT_SECRET_KEY

3. VoltAgent setup

Create the agent once and reuse it across invocations. The example keeps the serverless Hono provider so the same HTTP routes (agents, workflows, observability) stay available.

src/index.ts

import { Agent, VoltAgent } from "@voltagent/core";
import { serverlessHono } from "@voltagent/serverless-hono";
import { openai } from "@ai-sdk/openai";
import { weatherTool } from "./tools";

const assistant = new Agent({
  name: "netlify-function-agent",
  instructions: "Answer user questions and call tools when needed.",
  model: openai("gpt-4o-mini"),
  tools: [weatherTool],
});

const voltAgent = new VoltAgent({
  agents: { assistant },
  serverless: serverlessHono(),
});

export function getVoltAgent() {
  return voltAgent;
}

4. Netlify function handler

Use the helper exported from @voltagent/serverless-hono to convert Lambda events into Fetch requests automatically.

netlify/functions/voltagent.ts

import { createNetlifyFunctionHandler } from "@voltagent/serverless-hono";
import { getVoltAgent } from "../src/index";

const voltAgent = getVoltAgent();

export const handler = createNetlifyFunctionHandler(voltAgent);

5. netlify.toml

[functions]
  node_bundler = "esbuild"
  directory = "netlify/functions"

[[redirects]]
  from = "/*"
  to = "/.netlify/functions/voltagent/:splat"
  status = 200
  force = true

The redirect sends every HTTP route (/agents, /observability, /workflows, …) to the same function, mimicking the Cloudflare Workers routing behaviour.

6. Run locally

pnpm install
pnpm netlify dev

Use curl against http://localhost:8888/agents or other routes to validate.

7. Deploy

pnpm netlify deploy --prod

Netlify prints the production URL when the deploy finishes. If you need build steps (TypeScript, bundling) add them to your Netlify build command.

Observability notes

• The example keeps the in-memory span/log storage by default, exposed through /observability/* routes.
• When VoltOps credentials are present, OTLP exports run via fetch with retry; the Lambda execution waits for the response, so keep an eye on cold-start durations.
• VoltOps Console still falls back to HTTP polling because WebSockets are not available in the Netlify Function runtime.

Feature limitations

• Model Context Protocol still requires a Node server. The current Netlify Function runtime does not expose stdio transports.
• libSQL memory adapter needs a TCP socket. For Netlify Functions use the in-memory adapter or an external Postgres/Supabase database.

Memory configuration examples

In-memory (default)

import { Memory, InMemoryStorageAdapter } from "@voltagent/core";

const memory = new Memory({
  storage: new InMemoryStorageAdapter({
    storageLimit: 50,
  }),
});

PostgreSQL

import { Memory } from "@voltagent/core";
import { PostgresMemoryAdapter, PostgresVectorAdapter } from "@voltagent/postgres";

const memory = new Memory({
  storage: new PostgresMemoryAdapter({
    connectionString: env.POSTGRES_URL,
  }),
  vector: new PostgresVectorAdapter({
    connectionString: env.POSTGRES_URL,
  }),
});

Supabase

import { Memory } from "@voltagent/core";
import { SupabaseMemoryAdapter } from "@voltagent/supabase";

const memory = new Memory({
  storage: new SupabaseMemoryAdapter({
    url: env.SUPABASE_URL,
    serviceRoleKey: env.SUPABASE_SERVICE_ROLE_KEY,
  }),
});

Use netlify logs --target=production to tail production logs and confirm your agent runs as expected.