Extend your SaaS

with A/R & payments functionality

Enable your SaaS customers to offer value-added business services: e.g., job estimates, compliant invoicing, tax reporting & payments

Offer new value-added services

Get a step on your competition

We hear repeatedly how our SaaS customers want to add job estimates, invoicing and payments services to set them apart from their competitors.

Make your SMB customers more productive

Most of our SaaS customers serve SMBs who want to be more productive and spend less time chasing payments. Our electronic invoicing and automated A/R functions achieve just that.

Create new revenue streams

Premium service tiers

Job estimates, invoicing, and payments are often bundled in premium service tiers that fetch a higher price than your standard service offering.

Flexible billing models

Whether you want to charge per location, per transaction or per month, our invoicing engine can support your needs as you optimize how you package and bill for your services.

Reduce engineering costs

Invoicing as an API

Your developers have so much to do; you want them focused on the unique features of your software functionality. You can leave the invoicing and payments part to us with just a few lines of code.

Leave the tax compliance and reporting to us

The last thing you probably want your valuable engineers dealing with is the constantly-shifting local tax codes, invoicing formats, real-time reporting requirements, etc. We’ll monitor and implement those requirements for you so you can focus on developing your software’s core features.

curl https://api.spaceinvoices.com/v1/organizations/:ID/documents \
  -H "Authorization: TOKEN" \
  -d '{ \
    "type": "invoice" \
    "_documentClient": { \
      "name": "Rocket man", \
      "email": "[email protected]", \
      "country": "USA" \
    }, \
    "_documentItems": [{ \
      "name": "Space suit", \
      "quantity": 1, \
      "price": 19500 \
    }], \
    "send": true \
let response = await fetch('https://api.spaceinvoices.com/v1/organizations/:ID/documents', {
  method: 'POST',
  headers: {
    Authorization: 'TOKEN'
  body: {
    type: 'invoice',
    _documentClient: {
      name: 'Rocket man',
      email: '[email protected]',
      country: 'USA'
    _documentItems: [{
      name: 'Space suit',
      country: 19500,
      country: 1
    send: true
import requests
url = "https://api.spaceinvoices.com/v1/organizations/:ID/documents"
headers = {
  "Authorization": "TOKEN"
body = {
  "type": "invoice",
  "_documentClient": {
    "name": "Rocket man",
    "email": "[email protected]",
    "country": "USA"
  "_documentItems": [{
    "name": "Space suit",
    "country": 19500,
    "country": 1
  "send": True
response = requests.post(url, data=body, headers=headers)
Case study


Enty is a SaaS company that offers a complete suite of business services for companies wanting to enter new markets in Europe, including Estonia and the Netherlands.



As Enty prepared to launch its service and searched customer requirements, local invoicing services continued to come up as a need for businesses entering new markets. Time-to-market was imperative and engineering team was focused on other essential roadmap initiatives.


Enty searched the market for Invoicing API solutions and discovered Space Invoices as the clear market leader with hundreds of customers in Europe. A proof of concept was running with days, and premium-tier invoicing solution was launched soon afterwards.

"By teaming with Space Invoices, we were able to accelerate our time-to-market with a premium-tier invoicing solution that makes us more valuable to our customers."

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