Create Billing Portal Session

curl -X POST https://api.llmgenerator.com/api/v1/subscriptions/portal \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "returnUrl": "https://yourapp.com/settings/billing"
  }'

const response = await fetch('https://api.llmgenerator.com/api/v1/subscriptions/portal', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    returnUrl: 'https://yourapp.com/settings/billing'
  })
});

const data = await response.json();
// Redirect user to Stripe portal
window.location.href = data.url;

import requests

response = requests.post(
    'https://api.llmgenerator.com/api/v1/subscriptions/portal',
    headers={
        'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
        'Content-Type': 'application/json'
    },
    json={
        'returnUrl': 'https://yourapp.com/settings/billing'
    }
)
data = response.json()
print(f"Redirect to: {data['url']}")

{
  "url": "https://billing.stripe.com/p/session/test_a1b2c3d4..."
}

POST

subscriptions

portal

curl -X POST https://api.llmgenerator.com/api/v1/subscriptions/portal \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "returnUrl": "https://yourapp.com/settings/billing"
  }'

const response = await fetch('https://api.llmgenerator.com/api/v1/subscriptions/portal', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    returnUrl: 'https://yourapp.com/settings/billing'
  })
});

const data = await response.json();
// Redirect user to Stripe portal
window.location.href = data.url;

import requests

response = requests.post(
    'https://api.llmgenerator.com/api/v1/subscriptions/portal',
    headers={
        'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
        'Content-Type': 'application/json'
    },
    json={
        'returnUrl': 'https://yourapp.com/settings/billing'
    }
)
data = response.json()
print(f"Redirect to: {data['url']}")

{
  "url": "https://billing.stripe.com/p/session/test_a1b2c3d4..."
}

Overview

Creates a Stripe Customer Portal session where users can:

Update payment methods
View billing history
Change subscription plans
Download invoices
Cancel subscription

Requires session-based authentication (JWT access token).

For third-party integrations: Use POST /subscriptions/portal/api with API Key authentication instead.

Authentication

string

required

Your JWT access token. Format: Bearer YOUR_ACCESS_TOKEN

Request Body

string

URL to redirect to when user exits the portal. Defaults to application dashboard.

curl -X POST https://api.llmgenerator.com/api/v1/subscriptions/portal \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "returnUrl": "https://yourapp.com/settings/billing"
  }'

const response = await fetch('https://api.llmgenerator.com/api/v1/subscriptions/portal', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    returnUrl: 'https://yourapp.com/settings/billing'
  })
});

const data = await response.json();
// Redirect user to Stripe portal
window.location.href = data.url;

import requests

response = requests.post(
    'https://api.llmgenerator.com/api/v1/subscriptions/portal',
    headers={
        'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
        'Content-Type': 'application/json'
    },
    json={
        'returnUrl': 'https://yourapp.com/settings/billing'
    }
)
data = response.json()
print(f"Redirect to: {data['url']}")

{
  "url": "https://billing.stripe.com/p/session/test_a1b2c3d4..."
}

Response Fields

string

URL to redirect the user to. This is a Stripe-hosted billing portal.

Portal Capabilities

The Stripe Customer Portal allows users to:

Feature	Description
Payment Methods	Add, update, or remove credit cards
Invoices	View and download past invoices
Plan Changes	Upgrade or downgrade subscription
Cancellation	Cancel subscription
Billing History	View all past transactions

Error Responses

Bad Request - No billing account found. User must make a purchase first.

Unauthorized - Invalid or missing token.

The billing portal is only available for users who have previously made a purchase or have an active subscription. New users should use the checkout endpoint instead.

POST /subscriptions/portal/api

Creates a Stripe Customer Portal session using API Key authentication. Ideal for third-party integrations.

Authentication

Requires API Key authentication. Include your API key in the Authorization header:

Authorization: Bearer llmgen_your_api_key_here

Request Body

Same as /subscriptions/portal above.

Response

Same as /subscriptions/portal above.

curl -X POST https://api.llmgenerator.com/api/v1/subscriptions/portal/api \
  -H "Authorization: Bearer llmgen_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "returnUrl": "https://yourapp.com/settings/billing"
  }'

const response = await fetch('https://api.llmgenerator.com/api/v1/subscriptions/portal/api', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer llmgen_your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    returnUrl: 'https://yourapp.com/settings/billing'
  })
});

const data = await response.json();
// Redirect user to Stripe portal
window.location.href = data.url;

import requests

response = requests.post(
    'https://api.llmgenerator.com/api/v1/subscriptions/portal/api',
    headers={
        'Authorization': 'Bearer llmgen_your_api_key_here',
        'Content-Type': 'application/json'
    },
    json={
        'returnUrl': 'https://yourapp.com/settings/billing'
    }
)
data = response.json()
print(f"Redirect to: {data['url']}")

Best Practices

Link in settings: Add a “Manage Billing” button in your app’s settings page
After checkout: Redirect users to the portal after subscription purchase
Support: Provide portal access as a self-service option for billing issues

Get Started

Integrations

API Reference

Create Billing Portal Session

Overview

Authentication

Request Body

Response Fields

Portal Capabilities

Error Responses

POST /subscriptions/portal/api

Authentication

Request Body

Response

Best Practices

​Overview

​Authentication

​Request Body

​Response Fields

​Portal Capabilities

​Error Responses

​POST /subscriptions/portal/api

​Authentication

​Request Body

​Response

​Best Practices

Overview

Authentication

Request Body

Response Fields

Portal Capabilities

Error Responses

POST /subscriptions/portal/api

Authentication

Request Body

Response

Best Practices