# Old Colony Web Email Preflight Verifier

> 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.

## Facts

- Endpoint: POST https://api.oldcolonyweb.com/v1/email/verify?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/old-colony-web-email-preflight-verifier-1e9f3070
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yyz9xThloC4bdg0VFJa5x

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability old-colony-web-email-preflight-verifier-1e9f3070 -d '<json body>'
```

Example prompt: Before I start the enrichment run, can you preflight the email john.doe@gmial.com to check its syntax, MX records, whether it's a disposable address, and flag any obvious domain typos?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to inspect using deterministic syntax and domain/DNS evidence."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/old-colony-web-email-preflight-verifier-1e9f3070/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.oldcolonyweb.com](https://www.zero.xyz/host/api.oldcolonyweb.com/llms.txt)