Validate email addresses: RFC-style syntax checks, IDN domain normalization, live MX looku
Validate email addresses: RFC-style syntax checks, IDN domain normalization, live MX lookups with A/AAAA fallback (DNS-over-HTTPS), disposable-domain detection, role-address detection (info@, support@), free-provider flagging, and typo suggestions for popular providers (gmial.com -> gmail.com). Single address or batches up to 50. POST a JSON body like: {"emails":["[email protected]","[email protected]","[email protected]"]}
3000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-28
updated
Provider
keyronne.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xB86F95EF5FA904318Ea9Df3b59AdCe099b478fC4",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "3000",
"maxTimeoutSeconds": 60
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"emails": [
"[email protected]",
"[email protected]",
"[email protected]"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"results": [
{
"checks": {
"disposable": false,
"freeProvider": false,
"hasPlusTag": false,
"role": false
},
"dns": {
"deliverable": true,
"method": "MX",
"mxRecords": [
"mx.example.com"
]
},
"domain": "example.com",
"email": "[email protected]",
"valid": true
}
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"body": {
"properties": {
"email": {
"description": "One address to validate. Provide email or emails.",
"type": "string"
},
"emails": {
"description": "Batch of addresses to validate (max 50).",
"items": {
"type": "string"
},
"maxItems": 50,
"type": "array"
},
"skipDns": {
"default": false,
"description": "Skip MX/A lookups and return syntax + heuristic checks only.",
"type": "boolean"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"type": "object"
},
"output": {
"properties": {
"results": {
"items": {
"properties": {
"checks": {
"properties": {
"disposable": {
"type": "boolean"
},
"freeProvider": {
"type": "boolean"
},
"hasPlusTag": {
"type": "boolean"
},
"role": {
"type": "boolean"
}
},
"type": "object"
},
"dns": {
"properties": {
"deliverable": {
"description": "true/false, or null if DNS was unreachable."
},
"method": {
"enum": [
"MX",
"A-fallback",
"AAAA-fallback",
"unavailable"
],
"type": "string"
},
"mxRecords": {
"items": {
"type": "string"
},
"type": "array"
}
},
"type": "object"
},
"domain": {
"description": "Normalized ASCII domain.",
"type": "string"
},
"email": {
"type": "string"
},
"reason": {
"description": "Why the address is invalid, if it is.",
"type": "string"
},
"suggestion": {
"description": "Likely intended address for typos.",
"type": "string"
},
"valid": {
"type": "boolean"
}
},
"type": "object"
},
"type": "array"
}
},
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://keyronne.com/api/email-validate" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://keyronne.com/api/email-validate");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://keyronne.com/api/email-validate")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/820.json, and this resource appears in /discovery/resources and /discovery/search.