1. Create your account
Sign up for free and start in sandbox first if you want zero-risk testing.
Space Invoices Docs
Build embedded invoicing and compliance infrastructure into your product with a self-serve API, sandbox, and clear go-live path.
Decide Fast
Space Invoices is for teams that need compliant invoicing without building tax logic, PDF rendering, access control, entity isolation, and country rules from scratch.
Use this docs set when you want to:
- add invoicing to a SaaS, fintech, marketplace, store, or internal tool
- start in a free sandbox before touching live data
- choose between API, typed SDK, embedded UI, or copy-paste React components
- understand what signup, first entity, API key setup, and go-live actually look like
Skip straight to pricing or sales only if you already know you need custom commercial terms. Everyone else should start with a sandbox and the guide that matches their integration path.
Choose Your Path
API + JavaScript SDK Best when you want full control over backend workflows or a custom UI.
Embed SDK Best when you want pre-built UI fast and can work with an iframe-based integration.
React UI Best when you want real components you can copy, own, and restyle.
Platform / Multi-Tenant Best when each customer, seller, or client needs their own isolated invoicing setup.
Compare all integration paths →
What Happens After Signup
2. Create your first entity
New accounts create an entity after signup. That entity becomes the business context for invoices, customers, items, and settings.
3. Generate the right API key
Use an account key for multi-entity control or an entity key for one isolated business.
4. Issue a sandbox invoice
Create, render, and optionally email a test invoice before you wire up your live workflow.
View the real onboarding flow →
Common User Stories
SaaS Platforms Add invoicing to your product with one entity per customer and a clear dashboard access model.
E-Commerce Turn orders into invoices with the right timing, tax handling, and refund workflow.
Marketplaces Give each seller their own compliant invoicing layer without leaking data across tenants.
Fintechs Add invoicing to payment and banking flows with event-driven reconciliation.
Accountants Manage multiple client entities from one account and choose how clients access their data.
Why Teams Trust This Setup
Sandbox and live stay separate
Test with sandbox keys and sandbox entities before you create anything real.
Compliance is built into the model
Country rules, tax handling, rendering, and fiscalization hooks live in the same platform.
Pricing is understandable up front
Free sandbox, first entity free in production, usage-based scaling after that.
You can inspect everything
Use the API explorer, SDK docs, and resource reference before you commit to implementation details.
Start Here If You Already Know Your Intent
Quickstart Create your first invoice with the correct signup and entity flow.
Authentication Choose between account keys, entity keys, sandbox, and live.
Core Concepts Understand entities, documents, and why everything is scoped the way it is.
API Reference Inspect every endpoint, schema, and example.
Ready To Test It?
Start with a free sandbox, create your first entity, and issue one invoice before you think about live rollout.