API and Developer Help

API request signing

The exact HMAC signing format PrizeNest accepts for Partner API requests.

Last updated Sep 8, 2026

Canonical string

PrizeNest signs a five-line string:

text

v1
POST
/api/v1/partner/purchases
<timestamp>
<sha256 body hash>

Hash the raw JSON request body with SHA-256, then sign the canonical string with HMAC-SHA256 using the signing secret. Send the hex digest as sha256=<digest> in X-PrizeNest-Signature.

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