Early Access//New features and improvements every week.
Product 15 / 15·API

Connect Sell It Today to the rest of your tech stack. Whenever you want.

Documented REST API, event-driven webhooks, official SDKs, and stable endpoints. Build custom workflows, integrate your existing tools, and extend the platform with your own apps.

Public documentation. Free developer plan.

OnlineSIT.OS · PROD.15

API

The problem

A locked platform will eventually slow you down.

Your needs are changing. So are your processes. If every change depends on an external roadmap, you're stuck. If every integration requires a third-party tool that breaks at the worst possible moment, your infrastructure is fragile.

You shouldn't have to choose between simplicity and power.

The Solution

An open infrastructure. Unlimited extensions.

The Sell It Today API exposes all business resources: contacts, sales, payments, training, forms, and automations. Read, write, and trigger actions. Receive webhooks for every key event. All in JSON, using REST, as standard.

The system is yours. Make it work the way you want.

Features

Everything your developers need.

Documented REST API

Stable, versioned endpoints; JSON Schema; OpenAPI 3.1; typed errors; clear rate limits.

Event-based webhooks

Over 50 business events: lead creation, payment, signature, subscription, purchase. Automatic retries, HMAC signatures.

Official SDKs

Node, Python, PHP. Maintained by the team. TypeScript types. Updates synchronized with the API.

Strong Authentication

API keys per project. OAuth 2.0 for third-party apps. Granular permissions by scope.

Platform

The API at the heart of your Business OS.

Anything the platform can do, your code can do. Anything the platform triggers, your servers can respond to. The API and webhooks are a natural extension of Sell It Today.

The system is open. It's up to you to make it your weapon.

CRM
Payments
Pages
Automation
LMS
Analytics
API
Use Cases

Designed for tech teams that want to expand the platform.

Case 01

For technical agencies

Custom integrations for your customers. Documented REST endpoints. Event-driven webhooks. You can extend Sell It Today as if it were your own platform.

Case 02

For SaaS providers

Data synchronization between Sell It Today and your product. Standard OAuth 2.0 authentication. Predictable rate limiting. Your integration is stable in production.

Case 03

For data teams

Export to a data warehouse. Sync to a BI tool. Custom ETL pipelines. Your data flows without manual copy-and-paste.

Comparison

A standard API, not a makeshift solution.

REST, OAuth 2.0, event-driven webhooks, predictable rate limiting. Everything a tech team expects from a modern platform.

Feature

Classic Platform API

Sell It Today

Compliant

Feature

Classic Platform API

Sell It Today

Included

Feature

Classic Platform API

Sell It Today

At all events

Feature

Classic Platform API

Sell It Today

JS / Python / Ruby

Feature

Classic Platform API

Sell It Today

Transparent

Feature

Classic Platform API

Sell It Today

Autogenerated

Integrate Sell It Today into your tech stack. No surprises, no hacks.

Results Observed

An API built for production.

Stable, well-documented, and high-performing. Integrate Sell It Today into your tech stack.

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Uptime

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Faster to implement

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Up-to-date documentation

Security & Compliance

API Secured by Default

OAuth 2.0 authentication and API keys. TLS 1.3 encryption. Default rate limiting. GDPR compliance. Comprehensive access logs. An API built for production.

GDPR-compliant
European Hosting
Statistics
Strong authentication
The API is clean, well-documented, and predictable. We integrated it with our data warehouse in just one day.
A

Antoine

lead engineer

Expand the platform

Extend Sell It Today without rebuilding it.

Connect your internal tools, automate your business workflows, and build your own apps.