Echo

User Pays AI SDK

Your users pay as they go. You never front the bill.

Toolkit.dev

Toolkit.dev

$156.78

561

Shirtslop

Shirtslop

Shirt design
Shirt design
Shirt design
Shirt design
Shirt design
Shirt design
Blank shirt

$212.91

123

EchoVibes

EchoVibes

$348.63

488

Managed Auth

Drop-in auth components with login, balance and top-ups

Your Profit
Token Spend

Zero-cost Infra

Users pay usage, Echo settles costs and returns your share

Merit Systems Logo
OpenAI
Anthropic
Google Gemini

Unified Gateway

Echo SDK serves all frontier models behind a single gateway

Free & OSS

No fees by default. 2.5% fees on profits

Distribution Ready in Seconds

Change 5 lines from the Vercel AI SDK and you're production ready.
No API keys. No metering. No Stripe.

Next.js

User pays LLM inference made easy in Next.js

Serve LLM Inference risk-free

Monitor your users' balances and usage

Sponsor free tier for new users

React

User pays LLM inference made easy in React

Serve LLM Inference risk-free

Monitor your users' balances and usage

Sponsor free tier for new users

Revenue on Every Token

When once you set a markup, every token your users consume on your app is instant revenue.

One Balance, Every Model, Every App

Your Echo balance is shared across all Echo-powered apps. Pay once, use everywhere.

$1,812.67

Merit Systems Logo

Your Universal Balance for LLM Access

anthropic logoopenai logogoogle logometa logonous logoxai logomicrosoft logodeepseek logoqwen logo
anthropic logoopenai logogoogle logometa logonous logoxai logomicrosoft logodeepseek logoqwen logo
anthropic logoopenai logogoogle logometa logonous logoxai logomicrosoft logodeepseek logoqwen logo
anthropic logoopenai logogoogle logometa logonous logoxai logomicrosoft logodeepseek logoqwen logo
Toolkit.dev

Toolkit.dev

Jason Hedman

Configurable tool-calling chatbot with generative UI

$156.78

561

Shirtslop

Shirtslop

Ryan Sproule

Generate and print custom shirts from AI images

$212.91

123

EchoVibes

EchoVibes

Sam Ragsdale

An improved fork of Vercel's OSS vibe coding app

$348.63

488

EchoBanana

EchoBanana

Sam Ragsdale

Generate images using Google's new Nano Banana model

$569.63

108