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FHI Domain Change Evidence API
x402
FHI Domain Change Evidence API is a paid API for AI agents from polished-truth-c514.fhi-llc-1118.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Retrieves evidence of historical ownership or configuration changes for a given domain name
Price / call$0.01
Success—
StatusUnknown
How this service works
Stateful remote-MCP change evidence, payable per call with x402 Base USDC.
Output
Returns structured evidence of historical changes associated with the given domain, which may include ownership transfer records, DNS configuration changes, registrar change events, or other signals indicating the domain's history has been altered. Useful for due diligence, security research, and brand protection.
Example use cases
Pre-acquisition domain due diligence
“Before we buy the domain 'acmecorp.io', can you check if there's any evidence it changed ownership or had unusual configuration changes recently? I want to make sure we're not buying something with a sketchy history.”
Security research on suspicious domain
“I'm investigating a phishing campaign and one of the domains involved is 'secure-login-bank.net' — can you find any evidence of when it changed hands or how its DNS setup changed over time?”
Brand protection monitoring
“Someone might be squatting on a domain similar to ours — can you pull evidence of any recent ownership or registrar changes for 'my-brandname.com' so I can figure out what's going on?”
Technical details
Endpoint
POSThttps://polished-truth-c514.fhi-llc-1118.workers.dev/api/v1/domain-change-evidence?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to investigate whether a specific domain has changed ownership, DNS configuration, or registrar over time — particularly for security research, pre-acquisition due diligence, phishing investigation, or brand protection. It is purpose-built for domain change evidence retrieval and is priced per-call at $0.02 USDC via x402 on Base mainnet, making it suitable for autonomous agent workflows that need on-demand domain intelligence without subscription overhead.
Side effects
- Domain not found or no evidence available — may return empty results
- Invalid domain format — returns validation error
- Payment failure via x402 — request rejected before processing
- Network or worker timeout — transient error requiring retry
- Domain with no recorded change history — empty or minimal response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Public DNS name, such as example.com |
Output
Schema · Response
{
"type": "json",
"example": {
"domain": "example.com",
"changed": true,
"evidence": {
"a": [
"93.184.216.34"
],
"caa": [],
"aaaa": [],
"certificates": []
},
"monitoring": {
"state": "change_detected",
"signals": [
"dns_a_changed"
]
},
"firstObservation": false
}
}Tags
x402
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