Requirements
FastBill requires an active account and an API access token from your account settings to connect — both are set up on its own site.[3]
Get your FastBill credentials
Connect FastBill in WEXTL
- Log in to your WEXTL account, add the FastBill node module to your workflow, and click Create new credential.Instant triggers use webhooks — click Create a webhook first when adding one, then create the credential.
- Optional: In the Credential name field, enter a name for the credential.
- Enter the authentication credentials you copied from your FastBill account, or follow the on-screen instructions to create the credential.
- If prompted, authenticate your account and confirm access.
- If you want to make changes to your credential in the future, follow the steps in Manage credentials →
Notes
Credentials are org-scoped; share them with teammates from the Credentials picker on any of its nodes.For detailed information on connecting an application, see Connect an application →
FastBill node modules
The list below is a reference of every FastBill node module the integration supports. You will be able to pick any of them on the workflow canvas while building automations.
Browse every FastBill node module below — each one opens to show its input parameters, outputs, and connection requirements.
Output fields[3]
| Field | Type |
|---|---|
User ID | number |
Email address | |
Name | text |
Date created | date |
Input fields[3]
| Field | Type |
|---|---|
Customer ID | choice |
Customer Number | text |
Search Term | text |
Contact ID | choice |
Limit | number |
Output fields[3]
| Field | Type |
|---|---|
Customer ID | text |
Customer number | text |
Days for payment | number |
Created | date |
Payment type | number |
Bank name | text |
Bank account number | text |
Bank code | text |
Bank account owner | text |
Bank iban | text |
Bank bic | text |
Bank account mandate reference | text |
Show payment notice | boolean |
Account receivable | text |
Customer type | text |
Top | text |
Newsletter optin deprecated | number |
Organization | text |
Position | text |
Academic degree | text |
20other output fields
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
Customer Number | text |
Country Code | text |
City | text |
Search Term | text |
Limit | number |
Output fields[3]
| Field | Type |
|---|---|
Customer ID | text |
Customer number | text |
Days for payment | number |
Created | date |
Payment type | number |
Bank name | text |
Bank account number | text |
Bank code | text |
Bank account owner | text |
Bank iban | text |
Bank bic | text |
Bank account mandate reference | text |
Show payment notice | boolean |
Account receivable | text |
Customer type | text |
Top | text |
Newsletter optin deprecated | number |
Organization | text |
Position | text |
Academic degree | text |
20other output fields
Input fields[3]
| Field | Type |
|---|---|
Invoice ID | choice |
Invoice Number | text |
Invoice Title | text |
Customer ID | choice |
Start Due Date | date |
End Due Date | date |
Start Paid Date | date |
End Paid Date | date |
Start Date | date |
End Date | date |
Payment Type | text |
Start Last Update | date |
End Last Update | date |
Limit | number |
Output fields[3]
| Field | Type |
|---|---|
Invoice ID | text |
Type | text |
Customer ID | text |
Customer number | text |
Customer costcenter ID | text |
Organization | text |
Salutation | text |
First name | text |
Last name | text |
Address | text |
Address 2 | text |
Zipcode | text |
City | text |
Comment | text |
Payment type | number |
Days for payment | number |
Bank name | text |
Bank account number | text |
Bank code | text |
Bank account owner | text |
25other output fields
Input fields[3]
| Field | Type |
|---|---|
Invoice ID | choice |
Output fields[3]
| Field | Type |
|---|---|
Customer ID | text |
Customer number | text |
Days for payment | number |
Created | date |
Payment type | number |
Bank name | text |
Bank account number | text |
Bank code | text |
Bank account owner | text |
Bank iban | text |
Bank bic | text |
Bank account mandate reference | text |
Show payment notice | boolean |
Account receivable | text |
Customer type | text |
Top | text |
Newsletter optin deprecated | number |
Organization | text |
Position | text |
Academic degree | text |
20other output fields
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
Organization | text |
Academic Degree | text |
Position | text |
Salutation | choice |
First Name | text |
Last Name | text |
Address | text |
Address 2 | text |
ZIP Code | text |
City | text |
Country Code | text |
Secondary Address | text |
Phone | text |
Phone 2 | text |
Fax | text |
Mobile | text |
Email | |
VAT ID | text |
Currency Code | text |
2other input fields
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Contact ID | number |
Input fields[3]
| Field | Type |
|---|---|
Customer TypeRequired | choice |
Customer Number | text |
Position | text |
Academic Degree | text |
Salutation | choice |
Address | text |
Address 2 | text |
Secondary Address | text |
ZIP Code | text |
City | text |
State | text |
Country Code | text |
Phone | text |
Phone 2 | text |
Fax | text |
Mobile | text |
Email | |
Website | url |
Account Receivable | text |
Currency Code | text |
10other input fields
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Customer ID | number |
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
ItemsRequired | array |
Customer Cost Center ID | text |
Contact ID | text |
Currency Code | text |
Template ID | text |
Template Hash | text |
Introduction Text | text |
Invoice Title | text |
Invoice Date | date |
Delivery Date | date |
Service Period Start | date |
Service Period End | date |
Cash Discount Percent | number |
Cash Discount Days | number |
VAT Case | boolean |
Is Gross | boolean |
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Invoice ID | number |
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
Start DateRequired | date |
FrequencyRequired | choice |
Output TypeRequired | choice |
ItemsRequired | array |
Customer Cost Center ID | text |
Currency Code | text |
Template ID | text |
Introduction Text | text |
Occurrences | number |
Email Notify | boolean |
Delivery Date | date |
Cash Discount Percent | number |
Cash Discount Days | number |
VAT Case | boolean |
Template Hash | text |
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Invoice ID | number |
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
Input fields[3]
| Field | Type |
|---|---|
Article IDRequired | choice |
Input fields[3]
| Field | Type |
|---|---|
Invoice IDRequired | choice |
Input fields[3]
| Field | Type |
|---|---|
Project IDRequired | choice |
Input fields[3]
| Field | Type |
|---|---|
Recurring Invoice IDRequired | choice |
Input fields[3]
| Field | Type |
|---|---|
Contact IDRequired | choice |
Customer ID | choice |
Organization | text |
Academic Degree | text |
Position | text |
Salutation | choice |
First Name | text |
Last Name | text |
Address | text |
Address 2 | text |
ZIP Code | text |
City | text |
Country Code | text |
Secondary Address | text |
Phone | text |
Phone 2 | text |
Fax | text |
Mobile | text |
Email | |
VAT ID | text |
3other input fields
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Contact ID | number |
Input fields[3]
| Field | Type |
|---|---|
Customer IDRequired | choice |
Customer Type | choice |
Customer Number | text |
Position | text |
Academic Degree | text |
Salutation | choice |
Address | text |
Address 2 | text |
Secondary Address | text |
ZIP Code | text |
City | text |
State | text |
Country Code | text |
Phone | text |
Phone 2 | text |
Fax | text |
Mobile | text |
Email | |
Website | url |
Account Receivable | text |
11other input fields
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Customer ID | number |
Input fields[3]
| Field | Type |
|---|---|
Invoice IDRequired | choice |
Customer ID | choice |
Items | array |
Customer Cost Center ID | text |
Contact ID | text |
Currency Code | text |
Template ID | text |
Template Hash | text |
Introduction Text | text |
Invoice Title | text |
Invoice Date | date |
Delivery Date | date |
Service Period Start | date |
Service Period End | date |
Cash Discount Percent | number |
Cash Discount Days | number |
VAT Case | boolean |
Is Gross | boolean |
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Input fields[3]
| Field | Type |
|---|---|
Recurring Invoice IDRequired | choice |
Customer IDRequired | choice |
Start Date | date |
Frequency | choice |
Output Type | choice |
Items | array |
Customer Cost Center ID | text |
Currency Code | text |
Template ID | text |
Introduction Text | text |
Occurrences | number |
Email Notify | boolean |
Delivery Date | date |
Cash Discount Percent | number |
Cash Discount Days | number |
VAT Case | boolean |
Template Hash | text |
Delete Existing Items | choice |
Output fields[3]
| Field | Type |
|---|---|
Status | text |
Templates
Look for FastBill templates in the WEXTL template library.
Browse templates →Explore alternative apps
- Billogram[2]Digital invoicing and billing platform that sends invoices and collects payments from customers.
- AdyenGlobal payment platform for online, in-person, and unified commerce transactions.
- ChargebeeSubscription billing for customers, plans, invoices, and payments.
- BillduInvoice creation, billing, and payment management for small businesses.
- BillingoHungarian online invoicing and billing platform for creating invoices, tracking payments, and managing customers.
References
- WEXTL® FastBill Source Code connector implementation.
- Our users use cases and automations.
- Official API Documentation for FastBill.
- WEXTL® visual workflow builder data.
Last updated: Jul 24, 2026 18:11