# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from json-repair.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).

Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX/SPF/DMARC record health.

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/disposable-email?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-917b71ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-HyHYZQ3GdPGn6gyjQrPA

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 json-repair-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-917b71ba
```

Example prompt: Can you check whether john.doe@tempmail.com is a real, deliverable email address — specifically if it's from a disposable provider and whether the domain has valid MX, SPF, and DMARC records set up?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email quality check combining syntax validation, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC inspection in a single call — especially for lead enrichment pipelines, user registration screening, or pre-send deliverability audits where a single lightweight API call at $0.005 is preferable to assembling multiple DNS lookup tools.

## Known failure modes

- Missing or malformed email parameter returns a 400 error
- DNS lookup timeouts for domains with slow or unresponsive nameservers may yield partial results
- Newly registered disposable domains not yet in blocklists may pass the disposable check
- Role account detection relies on heuristics and may miss unusual role prefixes
- Payment not completed (x402 flow) results in a 402 response before any validation occurs

## How this service works

Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://json-repair.agentdiet.dev/v1/disposable-email)

## Output

Returns a structured JSON object indicating whether the email has valid syntax, whether the domain belongs to a known disposable/burner provider, whether it is a role-based address (e.g. info@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records including their values and validity status.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "email"
 ],
 "properties": {
  "email": {
   "type": "string",
   "minLength": 1,
   "description": "Email address to validate for syntax, MX deliverability, and disposable risk"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/json-repair-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-917b71ba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)