# Overview 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.
CapabilitiesDeveloper AccountSupport AccountAdmin Account
Access Smart Platformxxx
Customize Payment Pagexx
Create New Usersx
Create Credentialsx
Manage Transactions (Just on Sandbox Env.)xx
Generate Reportsxx
*** ### 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" } } ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.smartfastpay.com/overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.