Use when an agent is about to email or sign up a contact
Use when an agent is about to email or sign up a contact. Input: email. Output: JSON verdict (deliverable, risky, undeliverable) with reasons, MX hosts, null MX, SPF and DMARC policy, disposable domain, role account, free provider. No SMTP probe, so the mailbox itself is not verified. Malformed address refused before payment. Example: ?email=info@example.com
Answeringour last check, 2026-10-31
2 of 2checks answered this week
41 msmedian answer time
$0.002listed price per call
$0.002price 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
GET https://1gateway.dev/v1/email/check
| Category | Everything else |
|---|---|
| Provider host | 1gateway.dev |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| 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 |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.002 | 46 ms |
| 2026-10-29 | valid payment request | 402 | $0.002 | 37 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"email": "info@example.com"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"email": {
"description": "Email address to check",
"examples": [
"info@example.com"
],
"maxLength": 254,
"type": "string"
}
},
"required": [
"email"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"attribution": {
"type": "string"
},
"cached": {
"type": "boolean"
},
"checkedAt": {
"type": "string"
},
"disposable": {
"type": "boolean"
},
"dns": {
"properties": {
"dmarc": {
"properties": {
"policy": {
"type": [
"string",
"null"
]
},
"present": {
"type": "boolean"
},
"record": {
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"exists": {
"type": "boolean"
},
"implicitMx": {
"type": "boolean"
},
"mx": {
"items": {
"properties": {
"host": {
"type": "string"
},
"priority": {
"type": "integer"
}
},
"type": "object"
},
"type": "array"
},
"nullMx": {
"type": "boolean"
},
"spf": {
"properties": {
"all": {
"type": [
"string",
"null"
]
},
"present": {
"type": "boolean"
},
"record": {
"type": [
"string",
"null"
]
}
},
"type": "object"
}
},
"type": "object"
},
"domain": {
"type": "string"
},
"email": {
"type": "string"
},
"freeProvider": {
"type": "boolean"
},
"mailboxVerified": {
"type": "boolean"
},
"notes": {
"items": {
"type": "string"
},
"type": "array"
},
"reasons": {
"items": {
"type": "string"
},
"type": "array"
},
"roleAccount": {
"type": "boolean"
},
"syntax": {
"properties": {
"valid": {
"type": "boolean"
}
},
"type": "object"
},
"verdict": {
"type": "string"
}
},
"required": [
"email",
"domain",
"verdict",
"reasons",
"syntax",
"dns",
"disposable",
"roleAccount",
"freeProvider",
"mailboxVerified",
"cached",
"checkedAt",
"notes",
"attribution"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}