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Delx Commerce DNS SOA Serial Compare
x402
Delx Commerce DNS SOA Serial Compare 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).
Compares two DNS SOA serial numbers using RFC 1982 modular arithmetic to determine which is newer and by how much
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 with both input serials, the delta computed modulo 2^32, a boolean indicating whether the candidate is newer than the current, the schema version, a pass/fail status, and evidence metadata including input hash and confirmation that no data was retained and no external calls were made.
Example use cases
DNS zone transfer freshness check
“I need to check if my secondary DNS server's zone serial 2026080800 is behind the primary's serial 2026080902 — is the secondary stale and by how much?”
Automated DNS sync monitoring
“My monitoring script has current SOA serial 2025123101 and just pulled candidate serial 2025123199 from a remote nameserver — confirm the candidate is newer and give me the modular delta.”
Validate zone rollover after update
“I just updated my DNS zone and the old serial was 2026010101 and the new one is 2026010102 — can you verify the new serial is correctly ahead of the old one using RFC 1982 serial comparison?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/dns-soa-serial-compare?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a verifiable, pay-per-call, cryptographically evidenced computation of DNS SOA serial comparison using RFC 1982 modular arithmetic — particularly when you need auditability (input hash, no-retention evidence) and don't want to implement the modular arithmetic yourself. Prefer this over local computation when operating in agent workflows that require verifiable, trustless execution logs.
Side effects
- Missing required 'current' or 'candidate' integer fields returns a validation error
- Non-integer inputs (strings, floats) fail schema validation
- Payment failure or insufficient USDC balance results in 402 response before computation
- Extremely large integers outside 32-bit serial number range may produce unexpected modular results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| current | integer | Current supplied to DNS SOA Serial Compare; used only for this bounded calculation and processed in memory without retention. |
| candidate | integer | Candidate supplied to DNS SOA Serial Compare; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"current": 2026080901,
"candidate": 2026080902,
"delta_mod_32": 1,
"candidate_newer": true
},
"schema": "delx/util-dns-soa-serial-compare/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "9febd53cb6501e9bcda3f0c607a1384a0ce164c890676f9d5051bc3424e22c53",
"external_calls": 0
},
"operation": "web_reliability:dns_soa_serial_compare"
}
}Tags
x402
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