5.2 Headers Sent by Payblr

Header Example Required Notes
content-type application/json Yes The body is the raw JSON payload forwarded by Payblr.
user-agent payment-service-platform-functions/ehi Yes Identifies the Payblr EHI relay service.
x-ehi-signature bbda8f...6414fc Yes Lowercase hex HMAC-SHA256 digest generated by Payblr.
x-ehi-signature-algorithm hmac-sha256 Yes Current supported signature algorithm.
x-ehi-signature-timestamp 1780272000000 Yes Unix timestamp in milliseconds.
x-correlation-id client-test-correlation-001 Recommended Used for support, tracing, and troubleshooting.
traceparent 00-... Optional W3C distributed tracing context, when present.
tracestate ... Optional W3C distributed tracing state, when present.