SGSingaporeAPI
Browse APIs

IRAS API Marketplace

Government

by Inland Revenue Authority of Singapore (IRAS)

IRAS's developer portal exposing tax-related APIs such as GST Registered Business Search, Stamp Duty Calculator, and filing APIs for payroll (AIS) and corporate tax software. Public lookup APIs are self-serve; filing APIs require onboarding.

How to authenticate

  1. 1Create an account on the IRAS API Marketplace (apiservices.iras.gov.sg/iras/devportal/).
  2. 2Create an app in the portal to receive client_id and client_secret.
  3. 3Subscribe your app to the specific API product (e.g. GST Registered Business Search).
  4. 4Call endpoints with X-IBM-Client-Id and X-IBM-Client-Secret headers.
  5. 5Filing APIs (AIS, CIT, GST returns) additionally require IRAS approval and Corppass-based flows.

Example request

Request
curl -X POST 'https://apiservices.iras.gov.sg/iras/prod/GSTListing/SearchGSTRegistered' -H 'X-IBM-Client-Id: YOUR_ID' -H 'X-IBM-Client-Secret: YOUR_SECRET' -H 'Content-Type: application/json' -d '{"clientID":"YOUR_ID","regID":"200012345A"}'

Example response

Response (truncated)
{"returnCode":"10","data":{"name":"COMPANY PTE. LTD.","gstRegistrationNumber":"M90312345K","Status":"Registered"}}

Notes for AI agents

GST Registered Business Search is the easiest win: self-serve signup, no approval. The portal runs on IBM API Connect, hence the X-IBM-* header names.

Machine-readable version: /api/apis/iras-api-marketplace

Related APIs

ACRA Corporate Entity Information

ACRA via data.gov.sg

Government

Registered entity records from ACRA (UEN, entity name, type, status, registration date, registered address) published as open datasets, split alphabetically. Enables free UEN and company-name lookups.

Government DataNo authfree

APEX (api.gov.sg Gateway)

GovTech Singapore

Government

The whole-of-government API gateway through which agencies publish APIs (including ACRA BizFile, CPF and other agency services) to other agencies and approved businesses. Discovery and onboarding surface for gov APIs that are not on data.gov.sg.

Government DataRestrictedcontact

Handshakes API

Handshakes (DC Frontiers)

Commercial

Singapore corporate-intelligence API exposing official registry data (including ACRA-sourced Singapore company information) as entity searches, registry/financial/litigation reports and relationship graphs. Used for KYC/KYB customer due diligence, lead generation and vendor risk mapping, with output in JSON, XML or PDF.

Government DataTokencontact

Singapore Public Holidays

Ministry of Manpower via data.gov.sg

Government

Official gazetted public holidays per calendar year as simple date, day and holiday-name records. One small dataset per year, published by MOM.

Government DataNo authfree