ChatGPT Billing Agent
Turn ChatGPT into your billing agent. Create invoices, send payment reminders, track payments - all with natural language. Build your ChatGPT billing assistant in 5 minutes.
What's my billing status this month?
Here's your billing overview for January 2026:
Send reminders to overdue clients
What your ChatGPT billing agent can do
Your ChatGPT billing agent handles any invoicing task. From creating invoices to chasing payments - just describe what you need.
Create Invoices
Generate professional invoices by describing the work and client.
"Create an invoice for John's website project, €1,500"
Check Statistics
Get instant insights into your billing performance.
"How much revenue did I make last month?"
Send Reminders
Follow up on unpaid invoices automatically.
"Send a reminder to all overdue invoices"
Manage Customers
Add, update, or find customer information.
"Show me all invoices for Acme Corp"
Track Payments
Monitor which invoices are paid, pending, or overdue.
"Which invoices were paid this week?"
Overdue Alerts
Stay on top of late payments with instant alerts.
"List all invoices overdue by more than 7 days"
How ChatGPT becomes your billing agent
Connect PayRequest to ChatGPT using Custom GPT Actions. Your ChatGPT billing agent handles conversations, PayRequest executes the billing.
Natural Language Understanding
ChatGPT interprets your requests in plain English (or any language) and translates them into precise billing actions.
Instant Execution
Actions are executed in real-time through the PayRequest API. Create an invoice and it's sent within seconds.
Secure Authentication
Your API token is stored securely in ChatGPT. All requests are authenticated and encrypted end-to-end.
Context Awareness
ChatGPT remembers your conversation context. Ask follow-up questions without repeating yourself.
Create your ChatGPT billing agent
Build a ChatGPT billing agent in 5 minutes. Copy the schema, add your API key, and start automating invoices.
Create Custom GPT
Go to ChatGPT → Explore GPTs → Create. Name it 'My Billing Agent'.
Add Actions
In Configure → Actions, paste the OpenAPI schema below.
Add API Key
Get your API token from PayRequest settings and add it as Bearer auth.
Start Chatting
Ask your billing agent to create invoices, check stats, send reminders!
{
"openapi": "3.1.0",
"info": {
"title": "PayRequest Billing Agent",
"version": "1.0.0"
},
"servers": [
{ "url": "https://payrequest.app/api/v1" }
],
"paths": {
"/invoices": {
"get": {
"operationId": "listInvoices",
"summary": "List all invoices",
"parameters": [
{ "name": "status", "in": "query", "schema": { "type": "string" } }
]
},
"post": {
"operationId": "createInvoice",
"summary": "Create a new invoice"
}
},
"/invoices/stats": {
"get": {
"operationId": "getInvoiceStats",
"summary": "Get billing statistics"
}
},
"/invoices/{id}/remind": {
"post": {
"operationId": "sendReminder",
"summary": "Send payment reminder"
}
}
}
}Pro Tip: Add instructions
In your Custom GPT instructions, add context like 'You are a billing assistant for [Your Business]. Default currency is EUR. Always confirm before sending invoices.'
Why use a ChatGPT billing agent
Stop switching between apps. Your ChatGPT billing agent handles invoices, reminders, and reporting from one chat.
Save Time
Create invoices in seconds instead of minutes. No more clicking through forms.
Get Paid Faster
Instant reminders and follow-ups mean fewer overdue invoices.
Work Smarter
Let AI handle routine tasks while you focus on your actual work.
Always Available
Check billing status or create invoices anytime, from any device.
Build your ChatGPT billing agent today
Join thousands using ChatGPT billing agents to automate invoicing. Create your ChatGPT billing assistant free.
No credit card required. Free plan includes API access.