# OneShotAgent Email Deliverability Verifier

> OneShotAgent Email Deliverability Verifier is a paid API for AI agents from win.oneshotagent.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Verifies whether an email address is deliverable and valid

## Facts

- Endpoint: POST https://win.oneshotagent.com/v1/tools/verify/email
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oneshotagent-email-deliverability-verifier-02505470
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H2MpoOodbZvQRezJbHjoU

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 oneshotagent-email-deliverability-verifier-02505470 -d '<json body>'
```

Example prompt: Can you verify whether john.smith@acme.com is a real, deliverable email address before I add it to my outreach list?

## When to prefer this

Use this endpoint when you need to verify individual email addresses for deliverability before sending outreach or adding to a mailing list, especially when paired with the sibling profile enrichment and email sending endpoints on the same platform for an end-to-end outreach workflow.

## Known failure modes

- Invalid email format returns a validation error
- Unresolvable domain returns undeliverable status
- Catch-all mail servers may return ambiguous results
- Temporary DNS lookup failures may produce inconclusive results
- Payment failure or insufficient USDC balance blocks the request

## How this service works

Email deliverability verification

## Output

Returns a deliverability status for the submitted email address, indicating whether the email is valid and likely to be successfully delivered rather than bounced or rejected.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "format": "email"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oneshotagent-email-deliverability-verifier-02505470/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from win.oneshotagent.com](https://www.zero.xyz/host/win.oneshotagent.com/llms.txt)