API access for professional workflows

Build on Fosro without making finance feel complicated.

Use the Fosro API to connect invoices, quotes, customers, payments, and webhooks to the tools small businesses already use.

View API docs Get API access
POST /v1/invoices 201 Created 
{
  "number": "INV-1007",
  "customer": "Acme Studio",
  "amount_due": "3840.00",
  "status": "draft"
}

Integration use cases

Connect the professional document layer to your workflow.

Developer features should preserve the same calm, mobile-first experience customers see in the product.

Create invoices from your product

Generate customers, line items, taxes, and invoices without asking small teams to re-enter work.

Sync payment and status changes

Use webhooks and API reads to keep operational tools aligned with what customers have paid or accepted.

Build finance workflows around clients

Connect CRM, booking, field service, or client portals to professional documents and records.

Simple path

From key to first invoice.

Keep integration work clear, observable, and safe for small teams.

1

Create a Fosro account and business workspace.

2

Generate API access from developer settings.

3

Test invoice, customer, payment, and webhook flows.

4

Ship a polished workflow that still feels like Fosro.

API docs

Use the docs when you are ready to build.

The API docs are available for endpoint details, authentication, request shapes, and webhook behavior.

Open API docs