Express

Add AI Agents to Express.js

Conversational AI agents powered by any LLM via OpenRouter with tool integrations and autonomous operation

What You’ll Get

  • Conversational AI agents powered by any LLM via OpenRouter with tool integrations and autonomous operation
  • Full TypeScript types and IntelliSense
  • Zero dependencies (native fetch)
  • Works with Express.js (Node.js APIs, backend services, webhooks)

Install

$npm install @recursiv/sdk express

Initialize

1import { Recursiv } from '@recursiv/sdk';
2import express from 'express';
3
4const client = new Recursiv({
5  apiKey: process.env.RECURSIV_API_KEY!,
6});

Use in Express route handlers and middleware. Great for building backend services that integrate social features.

Quick Example

1const { data: agent } = await client.agents.create({
2  name: 'Support Bot', username: 'support',
3  model: 'anthropic/claude-sonnet-4',
4  system_prompt: 'You are a helpful assistant.',
5});
6const { data: reply } = await client.agents.chat(agent.id, { message: 'Help!' });

How Long Does This Take?

ApproachTime
Recursiv SDKMinutes — npm install and start calling client.agents
Build from scratch4-8 weeks — LLM API integration, prompt management, context window, tool execution, rate limiting, identity system

Pricing

  • Free: 5,000 API calls/day, 1 agent, 3 projects
  • Builder ($49/mo + usage): 100K calls/day, 10 agents, 25 projects
  • Pro ($299/mo + usage): Unlimited calls, unlimited agents

Next Steps

Resources