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Delx Commerce — Digest Header Verify
x402
Delx Commerce — Digest Header Verify 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).
Verifies an HTTP Digest header by checking whether a given algorithm and base64-encoded digest match the provided text, returning a match result and the computed digest.
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
A JSON object indicating whether the provided base64 digest matched the computed digest for the given text and algorithm ('matched': true/false), the algorithm used, the actual computed base64 digest, a pass/fail status, and evidence metadata including whether input was retained (always false), a SHA-256 fingerprint of the input, and the number of external calls made (always 0).
Example use cases
API Response Integrity Check
“I just received an API response with a SHA-256 Digest header value of 'ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=' — can you verify whether that matches the body text 'abc123responsedata'?”
Webhook Payload Tamper Detection
“We received a webhook payload that says its SHA-256 digest is 'XohImNooBHFR0OVvjcYpJ3NgPQ1qq73WKhHvch0VQtg=' — please verify this against the raw payload text 'event=purchase&amount=99' so I know it wasn't tampered with.”
Pre-send Digest Header Validation
“Before I send this HTTP request, can you check that the digest header I generated — 'n4bQgYhMfWWaL+qgxVrQFaO/TxsrC4Is0V1sFbDwCgg=' using SHA-256 — actually matches my request body 'name=John&action=submit'?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/digest-header-verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to verify the integrity of an HTTP Digest header without retaining any data — ideal for stateless, privacy-preserving content integrity checks. Preferred when you need cryptographic confirmation that a message body matches a received digest header, especially in automated pipelines handling untrusted API or webhook payloads. The pay-per-call USDC model (no signup) makes it suitable for ephemeral agent workflows.
Side effects
- Invalid or unsupported algorithm value returns an error or failed match
- Malformed base64 digest_base64 string causes a parsing error
- Text exceeding 8192 characters is rejected
- Missing required fields results in a validation error
- Payment not completed via x402 protocol returns HTTP 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Text supplied to Digest Header Verify; used only for this bounded calculation and processed in memory without retention. |
| algorithm | string | Algorithm supplied to Digest Header Verify; used only for this bounded calculation and processed in memory without retention. |
| digest_base64 | string | Digest Base64 supplied to Digest Header Verify; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"matched": true,
"algorithm": "sha-256",
"actual_base64": "ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0="
},
"schema": "delx/util-digest-header-verify/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "e2887c004f75ecae89be72af3d1ed97e6058d581b75c207eebceba1ccc080397",
"external_calls": 0
},
"operation": "web_reliability:digest_header_verify"
}
}Tags
x402
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