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how.is Domain Trust Check
x402
how.is Domain Trust Check is a paid API for AI agents from how.is, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).
Returns a risk score, verdict (likely_safe/caution/high_risk/inconclusive), and plain-English reasons for a domain based on age, spam/abuse blocklists, and HTTPS certificate validity.
Price / call$0.02
Success—
StatusUnknown
How this service works
Should an agent click, sign in to, or pay this domain? A risk score and verdict (likely_safe / caution / high_risk, or inconclusive when a check could not run) with plain-English reasons, from domain age, spam/abuse blocklists and the HTTPS certificate.
Output
A JSON object containing: a verdict string (likely_safe, caution, high_risk, or inconclusive), a numeric risk_score from 0–100, an array of reasons each with a risk level and plain-English explanation, the domain's age in days, a list of blocklist listings found, any blocklists that did not respond, whether the HTTPS certificate is valid, and any checks that could not be run. Also includes a payment receipt with charge and settlement transaction hash.
Example use cases
Vetting a payment site before checkout
“I just got an invoice from quickpay-invoices.net — can you check if that domain is safe to pay on? I want a risk verdict and any blocklist flags before I enter my card details.”
Screening a link in a phishing investigation
“Someone forwarded me a suspicious email with a link to secure-banklogin-update.com — can you run a trust check on that domain and tell me if it's high risk?”
Validating a vendor domain before onboarding
“We're about to onboard a new supplier at partnerhub-global.com — can you check their domain's trust score, how old it is, and whether it's flagged on any spam or abuse lists?”
Technical details
Endpoint
POSThttps://how.is/v1/domain/trust?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs a quick, structured safety verdict on a bare domain before fetching, authenticating, or paying — especially when you want a combined signal from domain age, abuse blocklists, and HTTPS validity in a single call rather than querying each source separately.
Side effects
- Invalid or malformed domain name returns a validation error
- Blocklist services unresponsive results in inconclusive verdict with unanswered blocklists listed
- Very new domain with no data may return inconclusive or limited reasons
- Payment failure over x402 prevents the check from running
- Domain with no HTTPS certificate returns https_valid: false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | A bare domain name, e.g. example.com |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"_shape": "data: verdict, risk_score (0-100), reasons[{risk, why}], age_days, blocklist_listings, blocklists_unanswered[], https_valid, not_checked[]."
},
"result": "Trust check for the requested subject",
"receipt": {
"rail": "x402",
"tool": "trust",
"charge_usd": 0.02,
"settlement_tx": "0x…"
}
}
}Tags
x402
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