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X402-BROKER MX-Check Endpoint
x402
X402-BROKER MX-Check Endpoint is a paid API for AI agents from mcp-gateway.agentdiet.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-22).
Checks/validates an email address or request via the AgentDiet MCP Gateway broker, returning a status and compression metadata.
Price / call$0.005
Success—
StatusUnknown
How this service works
Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.
Output
Returns a JSON object with a 'status' field (e.g. 'ok'), a 'data' object containing the check result, and an 'roi_proof' object that includes a compression_ratio_pct value indicating the data compression efficiency achieved.
Example use cases
Email reachability check before outreach
“Before I send a campaign, can you check whether contact@startup.io is reachable by running an MX check on it through the AgentDiet gateway?”
Verify email in agent onboarding flow
“A new user just signed up with the email newuser@mybusiness.com — can you run a quick check on it via the MCP gateway broker to confirm it looks valid?”
Diagnose bouncing email address
“We've been getting bounce errors from support@clientdomain.com — can you check that email through the AgentDiet MX-check endpoint and show me the status it returns?”
Technical details
Endpoint
GEThttps://mcp-gateway.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, paid email-level check routed through the AgentDiet x402 broker infrastructure, particularly when operating in an agentic context that supports USDC micropayments on Base and x402 protocol. Prefer this over generic validation APIs when you want deterministic execution with ROI/compression metadata returned alongside the status.
Side effects
- Missing required 'input' object results in schema validation error
- Invalid or malformed email parameter may return empty or error data
- Payment failure (insufficient USDC on Base) blocks the request with a 402 response
- Unsupported HTTP method (not GET or POST) causes rejection
- Upstream MCP gateway unavailability returns a non-200 status
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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