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Old Colony Web Email Preflight Verifier
x402
Old Colony Web Email Preflight Verifier is a paid API for AI agents from api.oldcolonyweb.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Deterministically validates an email address for syntax correctness, DNS/MX record presence, disposable domain status, and common provider typos before paid enrichment or outreach.
Price / call$0.002
Success—
StatusUnknown
How this service works
For $0.002, privacy-conscious email preflight: submitted addresses and request bodies are not intentionally logged in routine application telemetry (full address still reaches our server). Inspect syntax, DNS/MX, listed disposable domains and provider typos; receive structured decisions. API reverse-proxy access logging is disabled; infrastructure/payment providers may keep records. No zero-retention, mailbox-existence, deliverability or consent guarantee.
Output
Returns a deterministic validation decision with structured action reasons indicating syntax validity, DNS/MX record presence, whether the domain is on a disposable-provider list, and whether the domain matches a known provider typo pattern. Does not verify actual mailbox existence or deliverability.
Example use cases
Pre-outreach email quality gate
“I have a lead with the email sarah.jones@mailiantaor.com — can you run a quick preflight check on it to catch any typos in the domain, confirm it has valid MX records, and tell me if it's a disposable address before I add her to my outreach sequence?”
CRM import disposable email filter
“We're importing a batch of signups and one of them used the address tmpuser99@guerrillamail.com — can you validate it to see if it's a known disposable domain so I can decide whether to flag the record?”
Typo correction before enrichment
“Before we spend credits on enrichment, can you inspect the email mike.brown@yaho.com and tell me if the domain looks like a misspelling of a real provider so we can correct it first?”
Technical details
Endpoint
POSThttps://api.oldcolonyweb.com/v1/email/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap ($0.01), fast, deterministic pre-screen of an email address before investing in more expensive enrichment or outreach operations. Ideal as a gate before paid enrichment APIs, CRM imports, or bulk outreach sequences. Not suitable when you need confirmed mailbox existence, actual deliverability testing, or consent verification.
Side effects
- Malformed or missing email field returns a validation error
- Domain exists but has no MX records, flagged as undeliverable at DNS level
- Disposable domain list may not cover every known throwaway provider
- Typo detection is limited to curated provider list — novel misspellings may pass
- Does not confirm whether the mailbox actually exists or accepts mail
- No consent or deliverability guarantee provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to inspect using deterministic syntax and domain/DNS evidence. |
Tags
x402
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