Get started

As of 25 June 2025, PaySG will not be onboarding new users for API integrations until further notice.

PaySG APIs allows agencies to integrate the platform into their software systems. The API follows REST semantics, returns JSON-encoded responses, and uses standard HTTP response codes, authentication, and verbs. We do not provide SDKs.

Backwards compatibility is maintained within each major version of the API (/v1, /v2). However, new fields might be added as more features are developed on PaySG platform.

1. Introduction

Ensure that the onboarding steps in this section have been completed.

The rest of this guide walks you through setting up your integration with PaySG.

2. Create a payment service

To begin, follow our payment service guide and create a payment service on our testing environment (staging.pay.gov.sg). All .gov.sg email addresses can do so without needing to create an account.

3. Whitelisting

If you are a vendor, please request for your agency counterpart to contact us to whitelist your email addresses for access to our staging environment.

4. API keys

Provide our team with the relevant gov.sg email addresses to receive an API key. This email address must have been used to log in to PaySG's staging (test) environment or live environment before, so that it is associated with a user.

Staging API keys have the prefix paysg_stag_ while the live API keys have the prefix paysg_live_. Payments should be tested on the staging environment using dummy credit card numbers.

To make authenticated requests, provide an x-api-key: <key> header to the request.

All API requests must be made over HTTPS. Calls made over plain HTTP will fail. API requests without authentication will also fail.

5. Test out our endpoints

Refer to our documentation on endpoints to send your first request.