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AgentDiet MX-Check Email Validation
x402
AgentDiet MX-Check Email Validation is a paid API for AI agents from rag-diet.agentdiet.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-22).
Validates an email address by checking its MX (mail exchange) record configuration and returns a verification status with compression proof metadata.
Price / call$0.005
Success—
StatusUnknown
How this service works
Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://rag-diet.agentdiet.dev settling in USDC on Base.
Output
Returns a JSON object with a status field ('ok'), a data object containing the MX check result, and an roi_proof object showing compression_ratio_pct (e.g. 91.4) indicating how efficiently the context was processed.
Example use cases
Pre-send email list cleanup
“Before I send out this marketing campaign, validate whether contact@acmecorp.com actually has a working mail server so I don't waste sends on bad addresses.”
Lead qualification email check
“I just got a new lead who gave me the email founder@newstartup.io — can you verify it has a real MX record before I add them to my CRM?”
Sign-up form email gating
“A user just tried to register with noreply@fakeemail.xyz — check if that email domain has a valid mail exchange record so I can decide whether to allow the signup.”
Technical details
Endpoint
GEThttps://rag-diet.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call email MX validation in an agent-native (x402/A2A) workflow settling in USDC on Base. Best suited for AI agent pipelines that require deterministic email deliverability checks without managing OAuth or API keys — ideal for automated lead qualification, form validation, or list hygiene tasks embedded in agentic flows.
Side effects
- Missing or invalid email query parameter returns an error status
- Email domain with no MX record returns negative validation result
- Network timeout if DNS lookup takes too long
- Payment failure (x402) if USDC payment on Base is not provided or insufficient
- Malformed input schema returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"status": "ok",
"roi_proof": {
"compression_ratio_pct": 91.4
}
}
}Tags
x402
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