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© Government of Singapore • Last updated 23 Jun 2026

Singpass API FAPI 2.0 Troubleshooting Tool

Validate if your Singpass FAPI 2.0 integration components meet our requirements.

1

JWKS Validator

Validate your JWKS to verify keys meet Singpass requirements

Your JWKS

2

Client Assertion Validator

Verify that your client assertion JWT is valid and meets requirements

Environment

Staging

Endpoint

PAR

Client Assertion (JWT)

Public Signing Key (JWK — Optional for signature verification)

3

DPoP Validator

Verify that your DPoP JWT has correct parameters for Singpass FAPI

Environment

Staging

Endpoint

PAR

DPoP Token (JWT)

4

PKCE Validator

Validate that your code_challenge matches the S256 hash of your code_verifier

Code Challenge Method

Code Verifier

Length: 0 (must be 43–128)

Code Challenge

This tool helps partners verify their Singpass FAPI 2.0 integration parameters. All validation is performed client side in your browser.