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Contact Preflight
x402
Contact Preflight is a paid API for AI agents from api.amerosagent.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-24).
Checks domain-level email deliverability signals (MX provider, SPF, DMARC) and returns structured risk scores without verifying mailbox existence.
Price / call$0.003
Success—
StatusUnknown
How this service works
Domain-level contact preflight with MX provider, SPF, DMARC and structured risk signals. Does not claim mailbox existence.
Output
Returns structured domain-level signals including the MX provider name, SPF record presence and policy, DMARC policy details, and risk score indicators. Does not confirm whether the specific mailbox exists — only assesses the domain's email infrastructure health and associated risk level.
Example use cases
Pre-send email list hygiene
“I'm about to send a cold email campaign to 500 contacts — can you preflight check sarah.jones@bigretail.com to see if the domain has valid MX records, SPF, and DMARC before I start sending?”
CRM lead qualification
“We just got a new lead with email contact@startupxyz.io — run a domain preflight on it and tell me the risk signals and MX provider before we route it to sales.”
Fraud risk screening on signups
“A new user just signed up with the email address user@quickmailer.net — can you check the domain's SPF, DMARC, and MX setup to flag whether it looks like a disposable or high-risk domain?”
Technical details
Endpoint
GEThttps://api.amerosagent.com/v1/contact-preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need lightweight, fast domain-level email risk assessment before sending messages, adding contacts to a CRM, or approving user signups — without needing (or triggering) a full SMTP mailbox probe. Ideal for bulk pre-screening workflows where you want to filter obviously bad or risky domains cheaply before investing in deeper verification.
Side effects
- Invalid or malformed email address returns a validation error
- Domain with no MX records may return a high-risk signal or empty MX field
- DNS lookup timeout may cause delayed or failed response
- Non-existent domain returns an error or maximum risk signal
- Missing email query parameter returns a 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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