# DelX Email Validator

> DelX Email Validator is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Validates an email address and its domain-level DNS delivery records (MX, SPF, DKIM) to confirm deliverability before outreach, signup, or routing.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/email-validate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-delx-ai-e66710bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HWep76aV8iUCyJgVP-HJb

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 api-delx-ai-e66710bc -d '<json body>'
```

Example prompt: Can you validate whether john.doe@acmecorp.com is a real, deliverable email address — check the domain's MX records and DNS delivery configuration so I know it's safe to include in our outreach list?

## When to prefer this

Use this endpoint when you need to verify both the syntactic validity of an email address AND confirm the domain's DNS delivery infrastructure (MX, SPF, DKIM) is properly configured before sending outreach, accepting a signup, or routing a message. Prefer this over simple regex-based email checks when domain-level deliverability confidence is required.

## Known failure modes

- Invalid or malformed email address input returns a validation error
- Domain has no MX records — email cannot be delivered
- DNS lookup timeout or failure for the domain
- Email address uses a disposable/temporary domain and is flagged
- Rate limiting if too many calls are made in quick succession
- Payment failure via x402 protocol preventing the call from completing

## How this service works

Validate an email and its domain-level delivery records before outreach, signup, or routing.

## Output

Returns a structured validation result including whether the email address is syntactically valid, whether the domain has active MX records, SPF and DKIM configuration status, overall deliverability assessment, and any flags indicating the email is risky or undeliverable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string"
  },
  "timeout": {
   "type": "integer",
   "maximum": 15,
   "minimum": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "domain": "example.com",
   "a_records": [
    "93.184.216.34"
   ],
   "mx_records": [
    "10 mx.example.com."
   ],
   "normalized": "agent@example.com",
   "syntax_valid": true,
   "likely_deliverable": true
  },
  "tool_name": "util_email_validate"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-delx-ai-e66710bc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)