The Simplest Language Model API Ever Built

SimpleLM solves OpenAI's biggest limitation - no conversation history! Get persistent sessions, custom instructions, and enterprise-ready LM capabilities with just one API call.

1 API Call to Get Started
Conversation History
0 Setup Required

Everything You Need for Smart AI Integration

No servers to manage, no databases to set up, no complex infrastructure. Just simple API calls with powerful features.

Persistent Conversation History

Unlike OpenAI, SimpleLM automatically stores conversation history in sessions. No more context loss between calls!

Custom Instructions API

Create reusable instruction sets for different use cases. Make your AI talk to clients exactly how you want.

Simple REST API

Just 3 parameters: session_id, prompt, and optional instructions_id. That's it! No complex setup or configuration.

No Infrastructure Needed

Skip hosting your own LM server, setting up databases, or building document retrieval. It's all included!

Instant Setup

Sign up, get your API key, and start making calls immediately. No complex onboarding or setup process.

Enterprise Ready

Built for scale with enterprise-grade security, reliability, and performance from day one.

Simple Pricing That Scales With You

Pay only for what you use. No hidden fees, no complex billing. Start building with AI today.

Tester

Free

Perfect for testing and researching

Get Started

Starter

$ 29 /month

Perfect for developers and small projects

Get Started

Enterprise

Custom

For large-scale applications and enterprises

Contact Sales

It's Really This Simple

Three parameters. Unlimited possibilities with persistent conversation history.

That's It!
POST /api/chat JSON
{
  "session_id": "user_123_chat",
  "prompt": "What did we discuss yesterday?",
  "instruction_id": "customer_support"  // optional
}

This will remember the past prompts in that session and use the customer-support instructions.

POST /api/create_instruction JSON
{
  "instruction_id": "customer_support",
  "instruction": "Insert your customer-support 
    instructions here. Once created, you can 
    reuse them in any chat session simply by 
    specifying this instruction_id.
    That’s it—super simple!"
}

Once the instruction is created, you can use it in any chat session simply by specifying this instruction_id.

Session Memory

Each session_id maintains full conversation history automatically

Custom Instructions

Create reusable instruction sets for different use cases

Just Sign Up & Go

Get your API key and start making calls immediately

Be Among the First to Experience SimpleLM

Join our exclusive waitlist and get early access to the Simplest Language Model API ever built. No more losing conversation context - get persistent history out of the box!

Early access to the API
Complete API documentation & examples

Join the Waitlist