How to get the 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.
Postman
To generate REST API credentials for the sandbox and live environments:
Download Postman for your environment.
In Postman, select the
POST
method.Enter the
https://sandbox.smartfastpay.com/oauth2/token
request URL.On the Authorization tab, select the Basic Auth type. Type your client ID in the Username box, and type your secret in the Password box.
Click Send.
In exchange for these credentials, the SmartFastPay authorization server returns your access token in the access_token field:
Response
Include this bearer token in the Authorization header with the Bearer authentication scheme in REST API calls to prove your identity and access protected resources. This sample request includes a bearer token:
Access tokens have a finite lifetime. The expires_in
field contains the number of seconds after which the token expires. For example, an access token with an expiry value of 3600
expires in one hour from when the response was generated. In general, access tokens have a life of 15 minutes or eight hours depending on the scopes associated.
To detect when an access token expires, write code to either:
Keep track of the
expires_in
value in the token response.Handle the HTTP
401 Unauthorized
status code. The API endpoint issues this status code when it detects an expired token.
Re-use the access token until it expires. Then, get a new token.
cURL
Download cURL for your enviroment.
Note: On Windows, use a Bash shell to make cURL calls.
Run this command, where
client_id
is your client ID andsecret
is your secret:
Note: If you use a command-line tool other than cURL, set the
Accept
header toapplication/x-www-form-urlencoded.
In exchange for these credentials, the SmartFastPay authorization server returns your access token in the access_token
field:
Include this bearer token in the Authorization
header with the Bearer
authentication scheme in REST API calls to prove your identity and access protected resources. This sample request includes a bearer token:
Access tokens have a finite lifetime. The expires_in
field contains the number of seconds after which the token expires. For example, an access token with an expiry value of 3600
expires in one hour from when the response was generated. In general, access tokens have a life of 15 minutes or eight hours depending on the scopes associated.
To detect when an access token expires, write code to either:
Keep track of the
expires_in
value in the token response.Handle the HTTP
401 Unauthorized
status code. The API endpoint issues this status code when it detects an expired token.
Re-use the access token until it expires. Then, get a new token.
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