Check an email address for deliverability
Check an email address for deliverability: syntax, canonical form, MX, SPF, DMARC, disposable domain. One verdict with reasons and sources. DNS-over-HTTPS only, no mailbox probing. Not charged if the DNS lookup fails.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
274 msmedian answer time
$0.0032listed price per call
$0.0032price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://grokzilla.shop/api/skills/email-check
| Category | Everything else |
|---|---|
| Provider host | grokzilla.shop |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.0032 | 274 ms |
Example input (from the provider)
{
"body": {
"email": "jane.doe+news@gmail.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"email": {
"maxLength": 254,
"minLength": 3,
"type": "string"
},
"request_id": {
"description": "Optional idempotency key. Echoed back; a credit-pack redemption with the same request_id and body is charged once.",
"maxLength": 64,
"minLength": 1,
"pattern": "^[A-Za-z0-9._:-]+$",
"type": "string"
}
},
"required": [
"email"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"charged": {
"type": "boolean"
},
"confidence": {
"type": "number"
},
"data": {
"properties": {
"canonical": {
"type": "string"
},
"canonical_rule": {
"type": "string"
},
"disposable": {
"type": "boolean"
},
"dmarc": {
"properties": {
"p": {
"type": "string"
},
"pct": {
"type": "null"
},
"present": {
"type": "boolean"
},
"record": {
"type": "string"
},
"rua": {
"type": "boolean"
},
"sp": {
"type": "string"
}
},
"type": "object"
},
"domain": {
"type": "string"
},
"domain_exists": {
"type": "boolean"
},
"email": {
"type": "string"
},
"free_provider": {
"type": "boolean"
},
"implicit_mx": {
"type": "boolean"
},
"local": {
"type": "string"
},
"mailbox_checked": {
"type": "boolean"
},
"mx": {
"items": {
"type": "object"
},
"type": "array"
},
"mx_host_resolves": {
"type": "boolean"
},
"null_mx": {
"type": "boolean"
},
"plus_tag": {
"type": "string"
},
"reasons": {
"items": {
"type": "string"
},
"type": "array"
},
"role_account": {
"type": "boolean"
},
"spf": {
"properties": {
"count": {
"type": "integer"
},
"present": {
"type": "boolean"
},
"record": {
"type": "string"
}
},
"type": "object"
},
"syntax_valid": {
"type": "boolean"
},
"verdict": {
"type": "string"
}
},
"type": "object"
},
"data_as_of": {
"type": "string"
},
"generated_at": {
"type": "string"
},
"next": {
"items": {
"type": "string"
},
"type": "array"
},
"ok": {
"type": "boolean"
},
"service": {
"type": "string"
},
"skill": {
"type": "string"
},
"sources": {
"items": {
"properties": {
"fetched_at": {
"type": "string"
},
"name": {
"type": "string"
},
"url": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"summary": {
"type": "string"
},
"version": {
"type": "string"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"skill"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object