@reacherhq/api
Check if an email address exists without sending any email.
What is it?
Check if an email address exists without sending any email.
@reacherhq/api
is a thin TypeScript wrapper around the Reacher Email Verification API. Reacher is a 100% open-source SaaS, written in Rust. It's also free for personal use, and the API token in @reacherhq/api
is optional, but without it the requests will be rate-limited to 50 per month.
Usage
Install the package:
yarn add @reacherhq/api # Or npm install @reacherhq/api
There are two ways to use the library: by sending single API requests, or by using batch verification (parallel queue).
1. Single Email Verification
import { checkSingle } from '@reacherhq/api';
checkSingle(
{ to_email: 'someone@gmail.com' },
{
// Required.
apiToken: '<YOUR_TOKEN>',
}
).then(console.log); // Output will be the JSON described in the "JSON Output" section below.
2. Batch Email Verification
import { batchQueue } from '@reacherhq/api';
// Create a queue for email verifications.
const q = batchQueue({
// Required.
apiToken: '<YOUR_TOKEN>',
// Optional, callback to call on each successful verification.
onSuccessSingle: (result) => {
console.log(
`Verified email ${result.input}: the result is ${result.is_reachable}.`
);
},
});
// Push some data into the queue. The email verification will start as soon as
// it's in the queue. The queue has a default concurrency of 100.
q.push({ to_email: 'someone1@gmail.com' });
q.push({ to_email: 'someone2@gmail.com' }, { to_email: 'someone3@gmail.com' });
// Perform some action when the queue is drained.
q.drain(() => {
console.log('Finished processing all items.');
});
JSON Output
The output will be a JSON with the below format, the fields should be self-explanatory. For someone@gmail.com
(note that it is disabled by Gmail), here's the exact output:
{
"input": "someone@gmail.com",
"is_reachable": "invalid",
"misc": {
"is_disposable": false,
"is_role_account": false
},
"mx": {
"accepts_mail": true,
"records": [
"alt3.gmail-smtp-in.l.google.com.",
"gmail-smtp-in.l.google.com.",
"alt1.gmail-smtp-in.l.google.com.",
"alt4.gmail-smtp-in.l.google.com.",
"alt2.gmail-smtp-in.l.google.com."
]
},
"smtp": {
"can_connect_smtp": true,
"has_full_inbox": false,
"is_catch_all": false,
"is_deliverable": false,
"is_disabled": true
},
"syntax": {
"domain": "gmail.com",
"is_valid_syntax": true,
"username": "someone"
}
}
You can also take a look at the OpenAPI v3 specification of this JSON object.
License
The source code is available under the Apache-2.0 license. See the LICENSE file for more info.