> For the complete documentation index, see [llms.txt](https://docs.smartfastpay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.smartfastpay.com/overview.md).
# Overview
Before integrating a SmartFastPay product or solution, you must set up your development environment to get OAuth 2.0 Client ID and Secret credentials for the sandbox and live environments.
You exchange these credentials for an access token that authorizes your REST API calls. To test your web and mobile apps, you create sandbox accounts
Logging into the [Smart Platform](https://app.smartfastpay.com) to get credentials and create sandbox accounts requires a developer, support, or admin account. Each account provides different levels of access to API functionality.
Capabilities
Developer Account
Support Account
Admin Account
Access Smart Platform
x
x
x
Customize Payment Page
x
x
Create New Users
x
Create Credentials
x
Manage Transactions (Just on Sandbox Env.)
x
x
Generate Reports
x
x
***
### Get credentials
To generate REST API credentials for the sandbox and live environments:
1. Log in to the Smart Platform with your account.
2. Under the **MANAGEMENT** menu, select **Credentials**.
3. Remember to write down the chosen client\_secret, once saved, there is no way to recover it, you will need to create a new one.
***
### Get an access token
Your access token authorizes you to use the SmartFastPay REST API server. To call a REST API in your integration, exchange your client ID and secret for an access token in an OAuth 2.0 token call. While there are a few ways to get a token, here are examples using both the Postman app and a cURL command.
Your own environment's HTTP library or function may have `username` and `password` fields or an `auth` parameter in which you pass your client ID and secret. You can also add your Base64 encoded client ID and secret in an `Authorization: Basic` header.
***
### Make REST API calls
In REST API calls, include the URL to the API service for the environment:
* Sandbox: `https://sandbox.smartfastpay.com`
* Live: `https://api.smartfastpay.com`
Also, include your access token to prove your identity and access protected resources.
This sample call, which shows the Transaction creates, includes a bearer token in the Authorization request header. This type of token lets you complete an action on behalf of a resource owner.
```bash
curl -v --location --request POST 'https://sandbox.smartfastpay.com/transaction/checkout' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer ' \
--data-raw '{
"customer_id": "58f0c005-3b7d-4c75-81f3-93b9a6fee864",
"branch": "Office 2",
"name": "Richard Roe",
"amount": 4300,
"currency": "USD",
"callback": "http://mysite.com/api/notification",
"transaction": {
"id": "b08e3897-6505-4bb4-81a5-6e3a1d29e277",
"redirect": {
"url": "http://mysite.com/success_payment",
"type": "URL"
}
}
}'
```
The response shows the page or url, choosed by redirect type:
```json
{
"requestId": "73eaaecf-1bf4-4847-b4a9-8c615e891e1b",
"data": {
"url": "https://sandbox.smartfastpay.com/checkout/v1/f834fc1b-c8a0-4613-bcc9-2c188f6ef180",
"transaction_id": "f834fc1b-c8a0-4613-bcc9-2c188f6ef180"
}
}
```