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PennyAPI Regulatory Watch – Domain RDAP Delta Check
x402
PennyAPI Regulatory Watch – Domain RDAP Delta Check is a paid API for AI agents from pennyregwatch.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Fetches and compares current RDAP registration data for a domain against PennyAPI's historical baseline, returning any detected changes or confirming no change.
Price / call$0.02
Success—
StatusUnknown
How this service works
Monitor Texas childcare regulatory records and receive email alerts when important HHSC information changes.
Output
Returns a JSON object indicating whether the domain's RDAP data has changed ('NO_CHANGE' or a diff), a list of change events (if any), the source protocol (RDAP), timestamps for when the domain was first observed and last checked, and the count of events returned.
Example use cases
Competitor domain transfer alert
“Keep an eye on rival-brand.com for me — let me know the moment its RDAP registration data changes, like if it gets transferred to a new registrar or the nameservers flip.”
Brand protection domain watch
“Has mybrand.com had any changes to its domain registration record recently? Check against your last known snapshot and tell me if anything looks different.”
Expired domain opportunity tracking
“I'm watching acme-expired.com for signs it's been picked up by a new owner — can you check the RDAP delta and tell me if the registration data has changed from what you had before?”
Technical details
Endpoint
GEThttps://pennyregwatch.com/v1/domain/deltaWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call domain registration change detection using RDAP (not legacy WHOIS) and want a structured delta — i.e., only what changed — rather than a full raw RDAP dump. Ideal for agents polling many domains cheaply at $0.02 per call with no subscription required.
Side effects
- Domain not found in RDAP — returns empty events with NO_CHANGE status
- Invalid domain format — likely 400 error or empty result
- Domain not yet tracked by PennyAPI — first_observed_at equals last_checked_at with no events
- RDAP upstream unavailability — may return stale or error response
- Limit parameter out of range (must be 1–100) — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"domain": "example.com",
"events": [],
"source": {
"protocol": "RDAP"
},
"status": "NO_CHANGE",
"last_checked_at": "2026-09-06T16:00:00Z",
"first_observed_at": "2026-09-06T16:00:00Z",
"event_count_returned": 0
}
}Tags
x402
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