5.4 Static Test Vector

Use this static test vector to validate your HMAC implementation. For this test only, bypass timestamp freshness validation because the timestamp is fixed.

Shared secret

client_shared_secret_2026_example

Timestamp

1780272000000

Exact raw body

{"ProductID":"CLIENT-CARD-001","MTID":"0100","Txn_Type":"A","Txn_ID":"TXN-20260601-000001","Amount":1250,"Currency":"USD"}

Expected x-ehi-signature

bbda8f32036f959120590d49c5b855744e044129cd8c0b517eb66a005a6414fc