Invoice2go API
Invoice2go is an all-in-one invoicing and business-management platform used by 225,000+ small businesses—contractors, construction firms, auto repair shops, consultants, and freelancers—to send invoices and estimates, accept payments, track expenses and hours, and manage clients and projects. There is no public, self-serve developer API: programmatic access is limited to pre-built connectors (QuickBooks, Xero, Zapier) rather than a documented endpoint surface. An unofficial API lets you programmatically pull your own invoices, estimates, payments, clients, expenses, and project records—and push updates like new invoices, payment reminders, and client onboarding back into Invoice2go.
What is Invoice2go?
Invoice2go is an all-in-one invoicing and business-management platform that helps small businesses send invoices, accept payments, and run day-to-day operations from web, iOS, and Android. It is used by more than 225,000 small businesses—contractors, construction companies, auto repair shops, consultants, and freelancers—who rely on it as the system of record for the money flowing in and out of their business. The company reports roughly $24B in annual payments processed through the platform.
Core product areas include:
- Invoices (create, send, track status, recurring invoices, and overdue reminders)
- Estimates (professional quotes that convert to invoices)
- Payments (bank transfer, credit card, debit card, and PayPal)
- Expense management (attach receipts and track spend)
- Projects and hour tracking (track billable hours and bill them to clients)
- Reports (business-performance insights) and Customer reviews
- Integrations (QuickBooks, Xero, MYOB, Zapier, Shopify, Google Sheets, HubSpot)
Common data entities:
- Invoices, Line Items, Recurring Invoices, Invoice Status, Reminders
- Estimates/Quotes, Approvals, Conversions to Invoice
- Payments, Payment Methods, Settlements, Receipts
- Clients/Customers, Contacts, Customer Reviews
- Expenses, Receipts, Categories
- Projects, Time Entries, Billable Hours, Reports
The Invoice2go Integration Challenge
Small businesses run their entire accounts-receivable lifecycle on Invoice2go, but getting that data out programmatically is harder than it looks—the platform is built mobile-first for operators, not for developers:
- No public, self-serve API: there is no documented developer endpoint surface—programmatic access is limited to a fixed set of pre-built connectors, not an open API
- Connector-gated data: integrations flow through QuickBooks, Xero, MYOB, and Zapier, so you only get the fields those partners expose—not the full invoice, estimate, payment, and client model
- Mobile-first data capture: invoices, estimates, expenses, and receipts are often created on iOS and Android in the field, so the canonical record lives behind an authenticated app session
- Your own books, locked in: the invoices, payments, and client records are the business's own system of record, yet there is no clean way to bulk-export or stream them to a warehouse or downstream tool
- Payment and status nuance: invoice status, overdue reminders, recurring schedules, and multi-method payments (card, bank, PayPal) each carry state that generic connectors flatten or drop
- Session and authentication handling: headless automation against the web and mobile surfaces requires managing login, session continuity, and any step-up verification securely
How Supergood Creates Invoice2go APIs
Supergood reverse-engineers Invoice2go's authenticated web and mobile flows to deliver a resilient, fully documented API layer over your own account—turning a connector-gated, mobile-first product into a clean set of endpoints for your invoices, estimates, payments, clients, expenses, and projects.
- Handles login, session continuity, and any step-up verification in a managed, encrypted session
- Maintains session continuity with automated refresh and change detection across web and mobile surfaces
- Normalizes responses across Invoices, Estimates, Payments, Clients, Expenses, and Projects so you integrate once against consistent objects
- Preserves status, recurring schedules, and payment-method detail that generic accounting connectors flatten
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Getting Started
- Schedule Integration Assessment
Book a 30-minute session to confirm the Invoice2go data you need—invoices, estimates, payments, clients, expenses, or projects—and your authentication model.
- Supergood Generates and Validates Your API
We deliver a production-ready Invoice2go API tailored to your account, with normalized objects and validated reads and writes.
- Deploy with Monitoring
Go live with continuous monitoring and automatic adaptation as Invoice2go's web and mobile surfaces evolve.
API Endpoints
Authentication
/authenticateAuthenticate to an Invoice2go account in a managed session and obtain a token for downstream calls across web and mobile surfaces.
Invoicing
/invoicesList invoices with filters for client, status (draft, sent, paid, overdue), date range, and recurring schedule.
Invoicing
/create_invoiceCreate and send a new invoice with line items, taxes, payment methods, and optional recurring schedule.
Estimates
/estimatesRetrieve estimates and quotes with approval status and conversion-to-invoice state.
Payments
/paymentsPull payment records, methods (card, bank transfer, PayPal), and settlement status against invoices.
Clients
/clientsList clients and contacts with billing details, invoice history, and customer-review activity.
Use Cases
Sync invoices and payments into your accounting stack
- Pull invoices, line items, and status changes from Invoice2go into a warehouse or general ledger - Stream payment and settlement events to AR, reconciliation, and cash-flow tooling - Reconcile recurring invoices and overdue reminders without manual exports
Automate estimate-to-invoice workflows
- Push new estimates and quotes into Invoice2go from your CRM or field-service app - Track approvals and auto-convert accepted estimates into invoices - Trigger downstream scheduling and project creation when a quote is won
Keep client and contact data in sync
- Sync clients, contacts, and billing details between Invoice2go and your CRM - Surface invoice history and customer reviews against each client record - Onboard new clients programmatically when a deal closes upstream
Reconcile expenses and billable hours
- Pull expenses, receipts, and categories for spend reporting and tax prep - Sync project time entries and billable hours into payroll and analytics tools - Match expenses and hours against invoices for accurate job costing
Technical Specifications
Authentication
Account login with session and any step-up verification handled in a managed, encrypted session
Connectivity
Authenticated web and mobile (iOS/Android) flows reverse-engineered into a stable endpoint surface—no dependency on partner connectors
Response format
Normalized JSON across Invoices, Estimates, Payments, Clients, Expenses, and Projects objects
Rate limits
Adaptive throttling tuned to your account to avoid platform-side limits
Session management
Automatic session refresh, re-authentication, and credential rotation
Data freshness
Near real-time pulls for invoices, payments, and estimates with optional scheduled batch syncs
Security
Encrypted credential vault, scoped access tokens, SOC 2-aligned controls, and audit logging
Webhooks
Event-style callbacks for invoice sent, paid, and overdue, estimate approved, and new payment events
Latency
Sub-second reads on cached entities; multi-second writes when sending invoices or recording payments
Throughput
Horizontally scaled workers sized to high-volume invoice and payment activity
Reliability
Retry, backoff, and idempotency keys for invoice creation, payment recording, and client writes
Adaptation
Continuous monitoring of Invoice2go web and mobile releases with automatic adjustment to UI and flow changes
Frequently asked questions
No. Invoice2go does not publish a self-serve developer API. Programmatic access is limited to pre-built connectors such as QuickBooks, Xero, MYOB, and Zapier. Supergood provides a documented API over your own account so you can read and write the full invoice, estimate, payment, and client model directly.
Yes. Invoices, estimates, expenses, and receipts captured in the field on iOS and Android are part of the same account record. Supergood works against the authenticated surfaces so mobile-created data is available alongside web data.
Those connectors only expose the limited fields each partner maps. Supergood normalizes the full Invoice2go object model—invoice status, recurring schedules, payment methods, estimates, expenses, and projects—so you integrate once against consistent objects rather than a flattened subset.
Yes. The API supports reads (invoices, estimates, payments, clients, expenses, projects) and writes such as creating and sending invoices, pushing estimates, recording payments, and onboarding clients.
Payment records, methods (card, bank transfer, PayPal), and settlement status are normalized and linked to their invoices, so reconciliation and cash-flow reporting stay accurate without manual exports.