Invoice Fly data API: bills, estimates, clients

Labhouse Mobile · Business 4.7 ★

Invoice Fly (Play title Invoice Maker - Invoice Fly) is Labhouse Mobile SL's invoicing app for freelancers, trades and small studios that need to bill from a phone. After email or Google sign-in, the home tabs cover invoices and estimates with templates, line-item tax and discounts, a client list pulled from contacts, a jobs week view, expense capture, reports, and Pay with Stripe or PayPal plus optional tips. Recurring series cover retainers, an AI estimate builder turns a job description into line items, multi-user invites share a business, and the same account syncs across devices and the web client. Labhouse is a Barcelona company (Carrer de Pomaret); the Android listing is rated 4.7 from about 135,000 reviews with 1 million-plus downloads and sits in Play's top-grossing business chart. It competes with Invoice Simple, FreshBooks, Zoho Invoice and Wave as a mobile-first bill-and-estimate tool rather than a full desktop ledger.

Each sent bill carries invoiceNumber, dueDate, balanceDue, billType and billStatus, with line items as quantity, price, taxRate and taxAmount. Clients key on clientId, clientName, customerEmail and phoneNumber; the shop profile is businessId, businessName, logoUrl and canReceivePayments. The session is an idToken with uid / userId after email or Google sign-in.

Jobs schedule under jobName, scheduledDateTime and jobSiteAddress and attach to a bill as linkedJobId. Scanned spend returns expenseId, merchant, totalAmount and duplicatedExpense. Card and PayPal captures append paymentRecords with paidDate, tipAmount and alreadyPaidUrl; retainers pause as recurringInvoiceId / recurringType.

Finance ops chase unpaid EUR rows before the due date, payment desks match Stripe and PayPal captures, bookkeepers drop receipt OCR next to billed AR, and field teams turn a scheduled job into an invoice — and openData Studio turns that ledger into callable open data.

Screenshots

API surface

The endpoints and request/response examples below are reconstructed from the app's interface — illustrative, not a live capture.

Exchange sign-in token
POST /v1/invoicefly/login osint
Exchanges the Firebase idToken from email or Google sign-in for the session idToken, uid and userId that gate later bill, client and business calls.
Auth: Unauthenticated bootstrap. Body is the Firebase idToken from email or Google sign-in plus the user email. The returned idToken is sent as Authorization: Bearer on later calls.
- email
- idToken
- uid
- userId
- token
```
POST /v1/invoicefly/login HTTP/1.1
Content-Type: application/json

{
  "email": "[email protected]",
  "idToken": "eyJhbGciOi...",
  "uid": "usr_8f21a4c2"
}
```
```
{
  "idToken": "eyJhbGciOi...",
  "uid": "usr_8f21a4c2",
  "userId": "usr_8f21a4c2",
  "email": "[email protected]",
  "token": "st-9c11ab"
}
```

List invoices and estimates

GET /v1/invoicefly/invoices openfinance

Pages the signed-in business's bills — invoiceNumber, dueDate, balanceDue, billType and billStatus — that fill the Invoices and Estimates tabs.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login. Query billType filters invoice versus estimate.

billId
billName
invoiceNumber
billType
billStatus
clientId
clientName
dueDate
balanceDue
totalDue
totalPaid
taxAmount
taxRate
currency
overdue
paidDate
invoiceLink
billLink
poNumber
linkedJobId
createdAt
updatedAt

GET /v1/invoicefly/invoices?billType=invoice&limit=50 HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Accept: application/json

{
  "bills": [
    {
      "billId": "bill_7c11ab",
      "billName": "INV-1042",
      "invoiceNumber": "INV-1042",
      "billType": "invoice",
      "billStatus": "unpaid",
      "clientId": "cli_9aa01",
      "clientName": "Harbor Studio LLC",
      "dueDate": "2026-10-15",
      "balanceDue": 2613.0,
      "totalDue": 2613.0,
      "totalPaid": 0,
      "taxAmount": 213.0,
      "taxRate": 8.875,
      "currency": "EUR",
      "overdue": false,
      "paidDate": null,
      "invoiceLink": "https://files.example.com/i/bill_7c11ab",
      "billLink": "https://files.example.com/i/bill_7c11ab",
      "poNumber": "PO-88",
      "linkedJobId": "job_22",
      "createdAt": "2026-09-15T16:02:11.000Z",
      "updatedAt": "2026-09-15T16:04:02.000Z"
    }
  ]
}

Create an invoice

POST /v1/invoicefly/invoices openfinance

Creates a bill of billType invoice (or estimate) with line-item quantity, price, taxRate and discount, returning billId, invoiceNumber and balanceDue.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

billType
clientId
clientName
dueDate
currency
poNumber
linkedJobId
items
quantity
price
taxable
discount
taxRate
paymentInstructions
billId
billName
invoiceNumber
billStatus
balanceDue
totalDue
taxAmount
createdAt

POST /v1/invoicefly/invoices HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "billType": "invoice",
  "clientId": "cli_9aa01",
  "clientName": "Harbor Studio LLC",
  "dueDate": "2026-10-15",
  "currency": "EUR",
  "poNumber": "PO-88",
  "linkedJobId": "job_22",
  "items": [
    {
      "quantity": 1,
      "price": 2400.0,
      "taxable": true,
      "discount": 0,
      "taxRate": 8.875
    }
  ],
  "paymentInstructions": "SEPA or card"
}

{
  "billId": "bill_7c11ab",
  "billName": "INV-1042",
  "invoiceNumber": "INV-1042",
  "billType": "invoice",
  "billStatus": "unpaid",
  "balanceDue": 2613.0,
  "totalDue": 2613.0,
  "taxAmount": 213.0,
  "createdAt": "2026-09-15T16:02:11.000Z"
}

Email an invoice

POST /v1/invoicefly/invoices/send opendata

Sends the bill PDF to toEmail (with optional ccEmail and bccEmail) and returns invoiceLink / billLink for the client-facing copy.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login. Body identifies the bill and the recipient addresses.

billId
toEmail
ccEmail
bccEmail
customerEmail
billStatus
invoiceLink
billLink
status

POST /v1/invoicefly/invoices/send HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "billId": "bill_7c11ab",
  "toEmail": "[email protected]",
  "ccEmail": "[email protected]",
  "bccEmail": "[email protected]",
  "customerEmail": "[email protected]"
}

{
  "billId": "bill_7c11ab",
  "billStatus": "unpaid",
  "toEmail": "[email protected]",
  "invoiceLink": "https://files.example.com/i/bill_7c11ab",
  "billLink": "https://files.example.com/i/bill_7c11ab",
  "status": "sent"
}

Allocate next invoice number
GET /v1/invoicefly/invoice-number opendata
Returns the next invoiceNumber / billName for the signed-in business so New Invoice can stamp a unique number before save.
Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login. Query billType selects invoice versus estimate numbering.
- billType
- invoiceNumber
- billName
```
GET /v1/invoicefly/invoice-number?billType=invoice HTTP/1.1
Authorization: Bearer eyJhbGciOi...
```
```
{
  "billType": "invoice",
  "invoiceNumber": "INV-1043",
  "billName": "INV-1043"
}
```

List clients

GET /v1/invoicefly/clients osint

Returns the client directory used on New Invoice and the Clients tab — clientName, customerEmail, phoneNumber and address keyed by clientId.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

clientId
clientName
customerEmail
phoneNumber
address
createdAt
updatedAt

GET /v1/invoicefly/clients?limit=50 HTTP/1.1
Authorization: Bearer eyJhbGciOi...

{
  "clients": [
    {
      "clientId": "cli_9aa01",
      "clientName": "Harbor Studio LLC",
      "customerEmail": "[email protected]",
      "phoneNumber": "+34-93-555-0142",
      "address": "Carrer de Mallorca 12, Barcelona",
      "createdAt": "2024-01-09T12:00:00.000Z",
      "updatedAt": "2026-09-01T09:14:22.000Z"
    }
  ]
}

List estimates

GET /v1/invoicefly/estimates opendata

Lists estimate bills (billType estimate, totals, accepted/declined status) shown on the Estimates tab before convert-to-invoice.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

billId
billName
billType
billStatus
clientName
balanceDue
taxAmount
currency
createdAt
totalEstimates

GET /v1/invoicefly/estimates?limit=50 HTTP/1.1
Authorization: Bearer eyJhbGciOi...

{
  "estimates": [
    {
      "billId": "est_22b",
      "billName": "EST-210",
      "billType": "estimate",
      "billStatus": "accepted",
      "clientName": "Harbor Studio LLC",
      "balanceDue": 1959.75,
      "taxAmount": 159.75,
      "currency": "EUR",
      "createdAt": "2026-09-02T10:00:00.000Z"
    }
  ],
  "totalEstimates": 1
}

Draft an estimate with AI

POST /v1/invoicefly/estimates/ai opendata

Builds an estimate from a jobDescription and estimateBullets, returning drafted line items with quantity, price and taxAmount.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

clientId
jobDescription
estimateBullets
billId
billType
items
quantity
price
taxable
balanceDue
taxAmount

POST /v1/invoicefly/estimates/ai HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "clientId": "cli_9aa01",
  "jobDescription": "Kitchen remodel, 12 m2",
  "estimateBullets": ["Demolition", "Tile", "Plumbing"]
}

{
  "billId": "est_22c",
  "billType": "estimate",
  "estimateBullets": ["Demolition", "Tile", "Plumbing"],
  "items": [
    {"quantity": 1, "price": 1800.0, "taxable": true}
  ],
  "balanceDue": 1959.75,
  "taxAmount": 159.75
}

Load signed-in business

GET /v1/invoicefly/business opendata

Returns the signed-in business profile used on Settings — businessName, logoUrl, currency, address and whether canReceivePayments is on.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

businessId
businessName
businessEmail
businessPhone
businessAddress
businessWebsite
businessCountryCode
logoUrl
currency
canReceivePayments

GET /v1/invoicefly/business HTTP/1.1
Authorization: Bearer eyJhbGciOi...

{
  "businessId": "biz_k2mL",
  "businessName": "Alex Design Co",
  "businessEmail": "[email protected]",
  "businessPhone": "+34-93-555-0100",
  "businessAddress": "Carrer de Pomaret 56, Barcelona",
  "businessWebsite": "https://studio.example",
  "businessCountryCode": "ES",
  "logoUrl": "https://files.example.com/biz_k2mL/logo.png",
  "currency": "EUR",
  "canReceivePayments": true
}

Scan an expense receipt
POST /v1/invoicefly/expenses/scan opendata
Runs receipt OCR and returns an Expense with merchant, category, totalAmount and taxAmount, flagging duplicatedExpense when the same ticket was already saved.
Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login. Body is the receipt image for OCR.
- photoUrl
- businessId
- expenseId
- merchant
- category
- totalAmount
- taxAmount
- currency
- duplicatedExpense
```
POST /v1/invoicefly/expenses/scan HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "photoUrl": "<receipt-image>",
  "businessId": "biz_k2mL"
}
```
```
{
  "expenseId": "exp_44",
  "merchant": "Ferreteria Central",
  "category": "materials",
  "totalAmount": 186.4,
  "taxAmount": 15.2,
  "currency": "EUR",
  "duplicatedExpense": false
}
```

List jobs

GET /v1/invoicefly/jobs opendata

Lists scheduled jobs (jobName, jobSiteAddress, scheduledDateTime) that the Jobs week view shows and that New Invoice can attach via linkedJobId.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

jobId
jobName
jobTitle
jobDescription
jobSite
jobSiteAddress
scheduledDate
scheduledDateTime
clientId
linkedJobId
hasActiveJobs

GET /v1/invoicefly/jobs?from=2026-09-01&to=2026-10-01 HTTP/1.1
Authorization: Bearer eyJhbGciOi...

{
  "jobs": [
    {
      "jobId": "job_22",
      "jobName": "Harbor kitchen",
      "jobTitle": "Kitchen remodel",
      "jobDescription": "12 m2 tile and plumbing",
      "jobSite": "Carrer de Mallorca 12",
      "jobSiteAddress": "Carrer de Mallorca 12, Barcelona",
      "scheduledDate": "2026-09-18",
      "scheduledDateTime": "2026-09-18T09:00:00.000Z",
      "clientId": "cli_9aa01",
      "linkedJobId": "job_22",
      "hasActiveJobs": true
    }
  ]
}

Collect Stripe payment on a bill

POST /v1/invoicefly/payments/stripe openbanking

Charges a connected Stripe account against a bill and appends a paymentRecords row (amount, paidDate) so balanceDue and totalPaid update.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login. Used after the business connected a Stripe account.

billId
totalDue
currency
tipAmount
billStatus
paymentRecords
amount
paidDate
status
totalPaid
balanceDue

POST /v1/invoicefly/payments/stripe HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "billId": "bill_7c11ab",
  "totalDue": 2613.0,
  "currency": "EUR",
  "tipAmount": 0
}

{
  "billId": "bill_7c11ab",
  "billStatus": "unpaid",
  "paymentRecords": [
    {
      "amount": 2613.0,
      "currency": "EUR",
      "paidDate": "2026-09-20T18:11:00.000Z",
      "status": "succeeded"
    }
  ],
  "totalPaid": 2613.0,
  "balanceDue": 0,
  "tipAmount": 0
}

Pause all active recurring invoices

POST /v1/invoicefly/recurring/pause openfinance

Pauses every active recurring series for the business so retainers stop minting invoices until resumed.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login.

businessId
recurringInvoices
recurringInvoiceId
billName
isRecurring
recurringType
recurringDurationUnit
recurringDurationValue
status

POST /v1/invoicefly/recurring/pause HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "businessId": "biz_k2mL"
}

{
  "businessId": "biz_k2mL",
  "recurringInvoices": [
    {
      "recurringInvoiceId": "rec_44",
      "billName": "INV-R-12",
      "isRecurring": true,
      "recurringType": "monthly",
      "recurringDurationUnit": "month",
      "recurringDurationValue": 1,
      "status": "paused"
    }
  ]
}

Collect PayPal payment on a bill

POST /v1/invoicefly/payments/paypal openbanking

Starts PayPal checkout for a bill (optional tipAmount) and records the capture on paymentRecords with alreadyPaidUrl for the paid stamp.

Auth: Authorization: Bearer idToken from POST /v1/invoicefly/login. Used when PayPal is enabled on the business.

billId
totalDue
currency
tipAmount
alreadyPaidUrl
paymentRecords
amount
paidDate
status
totalPaid
balanceDue

POST /v1/invoicefly/payments/paypal HTTP/1.1
Authorization: Bearer eyJhbGciOi...
Content-Type: application/json

{
  "billId": "bill_7c11ab",
  "totalDue": 2613.0,
  "currency": "EUR",
  "tipAmount": 50.0
}

{
  "billId": "bill_7c11ab",
  "alreadyPaidUrl": "https://files.example.com/paid/bill_7c11ab",
  "paymentRecords": [
    {
      "amount": 2663.0,
      "currency": "EUR",
      "paidDate": "2026-09-21T11:02:00.000Z",
      "status": "succeeded"
    }
  ],
  "totalPaid": 2663.0,
  "balanceDue": 0,
  "tipAmount": 50.0
}

Where teams use this data

AR and due-date reconciliation
Nightly jobs pull GET /v1/invoicefly/invoices for invoiceNumber, dueDate, balanceDue, billStatus and overdue, then match GET /v1/invoicefly/clients (clientName, customerEmail) so finance can chase unpaid EUR bills before the due date.
Stripe and PayPal capture matching
Payment ops POST /v1/invoicefly/payments/stripe or POST /v1/invoicefly/payments/paypal and read paymentRecords, paidDate, tipAmount, totalPaid and alreadyPaidUrl against the bill's balanceDue.
Receipt OCR into the books
Bookkeepers POST /v1/invoicefly/expenses/scan to land merchant, category, totalAmount, taxAmount and duplicatedExpense next to GET /v1/invoicefly/business currency so spend sits beside billed AR.
Job schedule to invoice
Field desks read GET /v1/invoicefly/jobs (jobName, scheduledDateTime, jobSiteAddress) and POST /v1/invoicefly/invoices with linkedJobId, or POST /v1/invoicefly/estimates/ai from a jobDescription when the quote is still a sketch.

Frequently asked questions

How does Invoice Fly authenticate API calls?

POST /v1/invoicefly/login exchanges the Firebase idToken from email or Google sign-in (plus email and uid) for the session idToken, uid and userId. Later calls send Authorization: Bearer with that idToken.

Which endpoints expose invoices, estimates and clients?

GET /v1/invoicefly/invoices returns billId, invoiceNumber, dueDate, balanceDue, billType and billStatus. GET /v1/invoicefly/invoice-number allocates the next invoiceNumber. POST /v1/invoicefly/invoices creates a bill; POST /v1/invoicefly/invoices/send emails it to toEmail. GET /v1/invoicefly/estimates lists quotes; POST /v1/invoicefly/estimates/ai drafts one from estimateBullets. GET /v1/invoicefly/clients returns clientId, clientName, customerEmail and phoneNumber.

How are Stripe and PayPal captures recorded?

POST /v1/invoicefly/payments/stripe charges a connected Stripe account against a billId and appends paymentRecords (amount, paidDate, tipAmount) so totalPaid and balanceDue update. POST /v1/invoicefly/payments/paypal does the same via PayPal and returns alreadyPaidUrl for the paid stamp.

Can the API see jobs, expenses and the business profile?

Yes. GET /v1/invoicefly/jobs returns jobName, scheduledDateTime, jobSiteAddress and linkedJobId. POST /v1/invoicefly/expenses/scan OCRs a receipt into expenseId, merchant, totalAmount and duplicatedExpense. GET /v1/invoicefly/business returns businessName, logoUrl, currency and canReceivePayments. POST /v1/invoicefly/recurring/pause stops active series by recurringInvoiceId.

Apps similar to Invoice Fly

Invoice Simple: Invoice Maker — Invoice Simple is a mobile invoicing app for freelancers and trades: invoices, estimates, clients, Stripe/PayPal collection and receipt OCR.
Vyapar Invoice GST Billing App — Vyapar is an Indian GST/VAT billing and inventory app used by SMEs to raise tax invoices and track stock.
FreshBooks — FreshBooks is a cloud accounting product for small businesses: invoices, expenses, time tracking and client retainers.
Zoho Invoice — Zoho Invoice is Zoho's standalone invoicing app for estimates, recurring bills and online payment collection.
Wave Invoicing — Wave is a free invoicing and accounting suite for solopreneurs, with invoices, estimates and payment links.
QuickBooks — QuickBooks is Intuit's small-business accounting suite, with invoicing, expenses and bank feeds beyond a phone-first bill maker.
HoneyBook — HoneyBook is a client-flow tool for creatives: proposals, invoices, contracts and payments in one pipeline.

More Business apps

Topics

invoice fly api
invoice fly data api
invoiceNumber dueDate balanceDue
labhouse invoice api
invoice fly stripe paypal
invoice fly estimates jobs
barcelona invoicing api
invoice fly clients expenses

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Invoice Fly data API: bills, estimates, clients

Screenshots

API surface

Exchange sign-in token

List invoices and estimates

Create an invoice

Email an invoice

Allocate next invoice number

List clients

List estimates

Draft an estimate with AI

Load signed-in business

Scan an expense receipt

List jobs

Collect Stripe payment on a bill

Pause all active recurring invoices

Collect PayPal payment on a bill

Data categories

Where teams use this data

AR and due-date reconciliation

Stripe and PayPal capture matching

Receipt OCR into the books

Job schedule to invoice

Frequently asked questions

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Invoice Fly data API: bills, estimates, clients

Screenshots

API surface

Exchange sign-in token

List invoices and estimates

Create an invoice

Email an invoice

Allocate next invoice number

List clients

List estimates

Draft an estimate with AI

Load signed-in business

Scan an expense receipt

List jobs

Collect Stripe payment on a bill

Pause all active recurring invoices

Collect PayPal payment on a bill

Data categories

Where teams use this data

AR and due-date reconciliation

Stripe and PayPal capture matching

Receipt OCR into the books

Job schedule to invoice

Frequently asked questions

Related apps

Apps similar to Invoice Fly

More Business apps

ADP Mobile Solutions

Box

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Topics

Need this app's data API integrated?