Invoice2go API
Invoice2go has a REST API behind the oauth.2go.com portal with OAuth 2.0, webhooks, and a sandbox, covering invoices, estimates, clients, and payments. Access requires a registered partner application; there is no self-serve key flow. Accounting sync now routes through Apideck.
Frequently asked questions
Invoice2go scores C on the API Report Card. Invoice2go has a REST API behind the oauth.2go.com portal with OAuth 2.0, webhooks, and a sandbox, covering invoices, estimates, clients, and payments. Access requires a registered partner application; there is no self-serve key flow. Accounting sync now routes through Apideck.
Invoice2go has an official API, but teams routinely hit its limits: gated access, partial coverage, or paid tiers. Most end up supplementing it with exports or an unofficial API layer like Supergood.
Invoice2go is a mobile-first invoicing, estimates, payments, and lightweight business-management platform built for solo operators, tradespeople, and micro-SMBs who run their business from a phone.
Vertical: Financial Services (SMB billing & accounts receivable). Sub-vertical: mobile-first invoicing for solo operators and field-service micro-SMBs. Creating and emailing/SMS-ing professional invoices from a phone in under 60 seconds. Accepting online payments (card, ACH, PayPal) via embedded payment links on invoices.
Medium. Invoice2go reports ~225,000 small-business customers (Apideck case study, BILL filings) and was a top-grossing iOS business app for years before the BILL acquisition.
Invoice records: numbers, line items, taxes, discounts, status, due dates, paid/unpaid. Customer/client master data: name, address, contact info, payment terms. Estimates and proposals, conversion history to invoices.
Invoice2go was founded in 2002, making the brand ~24 years old.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.
Yes. Supergood maintains an unofficial Invoice2go API and MCP server so AI agents and internal tools can read and write Invoice2go data. See the Invoice2go integration docs at supergood.ai/docs/invoice2go-api.