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Delx Commerce HMAC-SHA256 Hex Digest API
x402
Delx Commerce HMAC-SHA256 Hex Digest API is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Computes an HMAC-SHA256 hex digest of an input text using a provided secret key, payable per-call via USDC.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object containing the hex-encoded HMAC-SHA256 digest of the input text, along with the algorithm name ('hmac-sha256') and schema version string ('delx/util-hmac-sha256-hex/v1').
Example use cases
Webhook signature verification
“Generate an HMAC-SHA256 hex signature for the payload '{"event":"payment.completed","amount":100}' using the secret 'wh_secret_abc123' so I can compare it to the signature in the incoming webhook header.”
API request signing for authentication
“I need to sign the string 'GET/api/orders/2024-06-01' with the secret 'api_secret_xyz' using HMAC-SHA256 to authenticate my outgoing API request.”
Data integrity token generation
“Create an HMAC-SHA256 hex hash of the string 'user_id=987&action=transfer&amount=50' with secret 'integrity_key_99' so I can attach it to a form submission for tamper detection.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/hmac-sha256-hex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call HMAC-SHA256 computation without managing infrastructure or signing up for an account, especially in agentic or automated workflows that already use x402/USDC micropayments on Base or Solana. It is ideal for one-off or low-volume cryptographic signing tasks within agent pipelines.
Side effects
- Missing 'text' or 'secret' fields returns an error
- Empty string inputs may produce valid but trivially weak digests
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Network timeout results in no digest returned
- Invalid JSON body returns a parsing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
| secret | string | Input field: secret. |
Output
Schema · Response
{
"type": "json",
"example": {
"hex": "5d98b45c90a207fa998ce639fea6f02ecc8cc3f36fef81d694fb856b4d0a28ca",
"schema": "delx/util-hmac-sha256-hex/v1",
"algorithm": "hmac-sha256"
}
}Tags
x402
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