Check up to 100 email addresses in one paid call, billed per address
Check up to 100 email addresses in one paid call, billed per address.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
893 msmedian answer time
$0.001listed price per call
$0.001price 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://mail.halowerk.com/email/batch
| Category | Everything else |
|---|---|
| Provider host | mail.halowerk.com |
| 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 |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 893 ms |
Example input (from the provider)
{
"body": {
"emails": [
"name@example.com"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"emails": {
"description": "Between 1 and 100 addresses. Billed at 0.0006 USDC per address with a 0.001 USDC minimum charge.",
"items": {
"type": "string"
},
"maxItems": 100,
"minItems": 1,
"type": "array"
},
"smtp_check": {
"default": false,
"description": "Ask for an optional SMTP probe. Off by default, heavily throttled, one attempt per target and never retried. Without it the verdict of a routable address stays \"unknown\".",
"type": "boolean"
}
},
"required": [
"emails"
],
"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"
}
},
"required": [
"input"
],
"type": "object"
}