Contacts

Manage contact profiles and custom fields, in bulk or one at a time.

Base URLhttps://api.emailit.com/v2Authentication Errors Rate limits

POST/contacts
GET/contacts/{id}
POST/contacts/{id}
GET/contacts
POST/contacts/bulk
GET/contacts/export
DEL/contacts/{id}

Create a contact

Creates a contact and, optionally, subscribes it to audiences.

POST/contacts

Requires a full API key. Email addresses are unique per workspace and stored in lowercase; creating a contact that already exists returns 409 with the existing contact. Fires contact.created, and subscriber.created for each audience. See Contacts.

Body parameters

emailstringrequired

The contact’s email address.

first_namestring

The first name.

last_namestring

The last name.

custom_fieldsobject

Values by custom field key, such as {"company": "Analytical Engines"}. Values for date fields must be YYYY-MM-DD. Keys that don’t match a custom field are stored as they are.

audiencesstring[]

IDs of audiences (aud_…) to subscribe the contact to. IDs that don’t exist in the workspace are skipped.

unsubscribedbooleandefault: false

true to create the contact as unsubscribed. Unsubscribed contacts are skipped by campaigns, and their audience memberships start unsubscribed.

Returns

Returns 201 with the contact object. Here audiences lists each audience with its id, name and subscribed status. See Retrieve a contact for all fields.

Returns 422 with usage when an audience is at your plan’s subscriber limit. In that case no contact is created.

POST/contacts

JavaScript

import { Emailit } from '@emailit/node';
const emailit = new Emailit('your_api_key');

const contact = await emailit.contacts.create({
  email: 'ada@example.com',
  first_name: 'Ada',
  last_name: 'Lovelace',
});

Python

from emailit import EmailitClient
client = EmailitClient("your_api_key")

contact = client.contacts.create({
  "email": "ada@example.com",
  "first_name": "Ada",
  "last_name": "Lovelace",
})

PHP

$emailit = Emailit::client('your_api_key');

$contact = $emailit->contacts()->create([
  'email' => 'ada@example.com',
  'first_name' => 'Ada',
  'last_name' => 'Lovelace',
]);

Ruby

require "emailit"
client = Emailit::EmailitClient.new("your_api_key")

contact = client.contacts.create(
  email: "ada@example.com",
  first_name: "Ada",
  last_name: "Lovelace"
)

import "github.com/emailit/emailit-go/v2"
client := emailit.NewClient("your_api_key")

contact, err := client.Contacts.Create(&emailit.CreateContactRequest{
  Email:     "ada@example.com",
  FirstName: "Ada",
  LastName:  "Lovelace",
})

Rust

use emailit::Emailit;

let emailit = Emailit::new("your_api_key");

let contact = emailit.contacts.create(
  emailit::types::CreateContactParams::new("ada@example.com")
    .with_first_name("Ada")
    .with_last_name("Lovelace")
).await?;

Java

import com.emailit.*;
import com.emailit.params.*;

EmailitClient emailit = new EmailitClient("your_api_key");

EmailitObject contact = emailit.contacts().create(
  ContactCreateParams.builder()
    .setEmail("ada@example.com")
    .setFirstName("Ada")
    .setLastName("Lovelace")
    .build()
);

using Emailit;

var emailit = new EmailitClient("your_api_key");

var contact = emailit.Contacts.Create(new ContactCreateOptions {
  Email = "ada@example.com",
  FirstName = "Ada",
  LastName = "Lovelace",
});

PHP

use Emailit\Laravel\Facades\Emailit;

$contact = Emailit::contacts()->create([
  'email' => 'ada@example.com',
  'first_name' => 'Ada',
  'last_name' => 'Lovelace',
]);

Terminal

curl -X POST https://api.emailit.com/v2/contacts \
  -H "Authorization: Bearer $EMAILIT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "email": "ada@example.com",
    "first_name": "Ada",
    "last_name": "Lovelace",
    "custom_fields": { "company": "Analytical Engines", "plan": "pro" },
    "audiences": ["aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2"]
  }'

JSON

{
  "object": "contact",
  "id": "con_4K9kQdrXth7am0TPKvPrR5yd2oo",
  "email": "ada@example.com",
  "first_name": "Ada",
  "last_name": "Lovelace",
  "custom_fields": {
    "company": "Analytical Engines",
    "plan": "pro"
  },
  "unsubscribed": false,
  "audiences": [
    {
      "id": "aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2",
      "name": "Newsletter",
      "subscribed": true
    }
  ],
  "created_at": "2026-10-01T10:20:31.704113Z",
  "updated_at": "2026-10-01T10:20:31.704113Z"
}

JSON

{
  "error": "Custom field \"Birthday\" must be a date in YYYY-MM-DD format"
}

JSON

{
  "error": "Contact with this email already exists",
  "existing": {
    "object": "contact",
    "id": "con_4K9kQdrXth7am0TPKvPrR5yd2oo",
    "email": "ada@example.com",
    "first_name": "Ada",
    "last_name": "Lovelace",
    "custom_fields": {
      "company": "Analytical Engines",
      "plan": "pro"
    },
    "unsubscribed": false,
    "audiences": [
      {
        "id": "aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2",
        "name": "Newsletter",
        "subscribed": true
      }
    ],
    "created_at": "2026-10-01T10:20:31.704113Z",
    "updated_at": "2026-10-01T10:20:31.704113Z"
  }
}

JSON

{
  "error": "Pro includes 50,000 subscribers per audience.",
  "usage": {
    "used": 50000,
    "limit": 50000,
    "plan": "pro"
  }
}

Retrieve a contact

Retrieves a contact with its custom fields and audience memberships.

GET/contacts/{id}

Requires a full API key.

Path parameters

idstringrequired

The contact ID (con_…) or the contact’s email address, URL-encoded.

Returns

Returns the contact object.

objectstring

Always contact.

idstring

The contact ID.

emailstring

The email address, in lowercase.

first_namestring | null

The first name.

last_namestring | null

The last name.

custom_fieldsobject

Custom field values by key. {} when there are none.

unsubscribedboolean

true if the contact unsubscribed from all campaigns.

audiencesobject[]

The audiences the contact belongs to, each with id, name and a subscriber object: id (sub_…), subscribed, subscribed_at, unsubscribed_at, created_at and updated_at.

created_atstring

When the contact was created.

updated_atstring

When the contact was last changed.

GET/contacts/{id}

JavaScript

import { Emailit } from '@emailit/node';
const emailit = new Emailit('your_api_key');

const contact = await emailit.contacts.get('con_4K9kQdrXth7am0TPKvPrR5yd2oo');

Python

from emailit import EmailitClient
client = EmailitClient("your_api_key")

contact = client.contacts.get("con_4K9kQdrXth7am0TPKvPrR5yd2oo")

PHP

$emailit = Emailit::client('your_api_key');

$contact = $emailit->contacts()->get('con_4K9kQdrXth7am0TPKvPrR5yd2oo');

Ruby

require "emailit"
client = Emailit::EmailitClient.new("your_api_key")

contact = client.contacts.get("con_4K9kQdrXth7am0TPKvPrR5yd2oo")

import "github.com/emailit/emailit-go/v2"
client := emailit.NewClient("your_api_key")

contact, err := client.Contacts.Get("con_4K9kQdrXth7am0TPKvPrR5yd2oo")

Rust

use emailit::Emailit;

let emailit = Emailit::new("your_api_key");

let contact = emailit.contacts.get("con_4K9kQdrXth7am0TPKvPrR5yd2oo").await?;

Java

import com.emailit.*;

EmailitClient emailit = new EmailitClient("your_api_key");

EmailitObject contact = emailit.contacts().get("con_4K9kQdrXth7am0TPKvPrR5yd2oo");

using Emailit;

var emailit = new EmailitClient("your_api_key");

var contact = emailit.Contacts.Get("con_4K9kQdrXth7am0TPKvPrR5yd2oo");

PHP

use Emailit\Laravel\Facades\Emailit;

$contact = Emailit::contacts()->get('con_4K9kQdrXth7am0TPKvPrR5yd2oo');

Terminal

curl https://api.emailit.com/v2/contacts/con_4K9kQdrXth7am0TPKvPrR5yd2oo \
  -H "Authorization: Bearer $EMAILIT_API_KEY"

JSON

{
  "object": "contact",
  "id": "con_4K9kQdrXth7am0TPKvPrR5yd2oo",
  "email": "ada@example.com",
  "first_name": "Ada",
  "last_name": "Lovelace",
  "custom_fields": {
    "company": "Analytical Engines",
    "plan": "pro"
  },
  "unsubscribed": false,
  "audiences": [
    {
      "id": "aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2",
      "name": "Newsletter",
      "subscriber": {
        "id": "sub_4KECYl5AwXEy8ezswYRhuddttxo",
        "subscribed": true,
        "subscribed_at": "2026-10-01T10:20:31.000000Z",
        "unsubscribed_at": null,
        "created_at": "2026-10-01T10:20:31.000000Z",
        "updated_at": "2026-10-01T10:20:31.000000Z"
      }
    }
  ],
  "created_at": "2026-10-01T10:20:31.000000Z",
  "updated_at": "2026-10-01T10:20:31.000000Z"
}

JSON

{
  "error": "Contact not found"
}

Update a contact

Updates a contact. Only the fields you send change.

POST/contacts/{id}

Requires a full API key. Fires contact.updated, with the previous values of changed fields in previous. Changing audiences also fires subscriber.created and subscriber.deleted for the memberships it adds and removes.

Path parameters

idstringrequired

The contact ID (con_…) or the contact’s email address, URL-encoded.

Body parameters

emailstring

A new email address. Must not belong to another contact.

first_namestring

The first name.

last_namestring

The last name.

custom_fieldsobject

Custom field values by key. Replaces all of the contact’s custom fields, so include the ones you want to keep.

unsubscribedboolean

true to unsubscribe the contact from all campaigns, false to resubscribe. Existing audience memberships keep their own status.

audiencesstring[]

The complete list of audience IDs the contact should belong to. The contact is added to audiences that aren’t in its list yet and removed from audiences that aren’t in yours. Send [] to remove it from every audience. To add or remove one audience without listing all of them, use Add a subscriber or Delete a subscriber.

Returns

Returns the updated contact in the same format as Retrieve a contact. A request without any of these fields returns 400.

POST/contacts/{id}

JavaScript

import { Emailit } from '@emailit/node';
const emailit = new Emailit('your_api_key');

const contact = await emailit.contacts.update('con_4K9kQdrXth7am0TPKvPrR5yd2oo', {
  first_name: 'Augusta',
});

Python

from emailit import EmailitClient
client = EmailitClient("your_api_key")

contact = client.contacts.update("con_4K9kQdrXth7am0TPKvPrR5yd2oo", {
  "first_name": "Augusta",
})

PHP

$emailit = Emailit::client('your_api_key');

$contact = $emailit->contacts()->update('con_4K9kQdrXth7am0TPKvPrR5yd2oo', [
  'first_name' => 'Augusta',
]);

Ruby

require "emailit"
client = Emailit::EmailitClient.new("your_api_key")

contact = client.contacts.update("con_4K9kQdrXth7am0TPKvPrR5yd2oo",
  first_name: "Augusta"
)

import "github.com/emailit/emailit-go/v2"
client := emailit.NewClient("your_api_key")

contact, err := client.Contacts.Update("con_4K9kQdrXth7am0TPKvPrR5yd2oo", &emailit.UpdateContactRequest{
  FirstName: "Augusta",
})

Rust

use emailit::Emailit;

let emailit = Emailit::new("your_api_key");

let contact = emailit.contacts.update("con_4K9kQdrXth7am0TPKvPrR5yd2oo",
  emailit::types::UpdateContactParams {
    first_name: Some("Augusta".into()),
    ..Default::default()
  }
).await?;

Java

import com.emailit.*;
import com.emailit.params.*;

EmailitClient emailit = new EmailitClient("your_api_key");

EmailitObject contact = emailit.contacts().update("con_4K9kQdrXth7am0TPKvPrR5yd2oo", 
  ContactUpdateParams.builder()
    .setFirstName("Augusta")
    .build()
);

using Emailit;

var emailit = new EmailitClient("your_api_key");

var contact = emailit.Contacts.Update("con_4K9kQdrXth7am0TPKvPrR5yd2oo", new ContactUpdateOptions {
  FirstName = "Augusta",
});

PHP

use Emailit\Laravel\Facades\Emailit;

$contact = Emailit::contacts()->update('con_4K9kQdrXth7am0TPKvPrR5yd2oo', [
  'first_name' => 'Augusta',
]);

Terminal

curl -X POST https://api.emailit.com/v2/contacts/con_4K9kQdrXth7am0TPKvPrR5yd2oo \
  -H "Authorization: Bearer $EMAILIT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"first_name": "Augusta"}'

Terminal

curl -X POST https://api.emailit.com/v2/contacts/ada%40example.com \
  -H "Authorization: Bearer $EMAILIT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "custom_fields": { "company": "Analytical Engines", "plan": "business" },
    "audiences": ["aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2", "aud_4KOlh9t2uw5od4qypqCtyrZyDq2"]
  }'

JSON

{
  "object": "contact",
  "id": "con_4K9kQdrXth7am0TPKvPrR5yd2oo",
  "email": "ada@example.com",
  "first_name": "Augusta",
  "last_name": "Lovelace",
  "custom_fields": {
    "company": "Analytical Engines",
    "plan": "pro"
  },
  "unsubscribed": false,
  "audiences": [
    {
      "id": "aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2",
      "name": "Newsletter",
      "subscriber": {
        "id": "sub_4KECYl5AwXEy8ezswYRhuddttxo",
        "subscribed": true,
        "subscribed_at": "2026-10-01T10:20:31.000000Z",
        "unsubscribed_at": null,
        "created_at": "2026-10-01T10:20:31.000000Z",
        "updated_at": "2026-10-01T10:20:31.000000Z"
      }
    }
  ],
  "created_at": "2026-10-01T10:20:31.000000Z",
  "updated_at": "2026-10-02T09:03:17.000000Z"
}

JSON

{
  "error": "No valid fields provided for update. Provide at least one of: email, first_name, last_name, custom_fields, unsubscribed, audiences"
}

JSON

{
  "error": "Contact not found"
}

JSON

{
  "error": "Another contact with this email already exists"
}

List contacts

Returns a page of contacts, newest first.

GET/contacts

Requires a full API key. Use the same parameters with Export contacts to download every match as a file.

Query parameters

pageintegerdefault: 1

The page to return.

limitintegerdefault: 10

Contacts per page, from 1 to 100.

searchstring

Case-insensitive match on the email address, first name or last name. q works too.

audience_idstring

Only contacts in this audience (aud_…).

unsubscribedboolean

true or false. Only contacts with this unsubscribed status.

sortstringdefault: created_at

email, first_name, last_name, name, audiences, created_at or updated_at.

orderstringdefault: desc

asc or desc. On this endpoint order is the sort direction, not the sort key.

matchstringdefault: all

all or or. How the filters below combine.

Filters

Add filters as key.condition=value, for example email.ends_with=@acme.com or custom_fields.plan.exact=pro. See Filtering.

Key	Type	Notes
`email`	string
`first_name`	string
`last_name`	string
`name`	string	First and last name joined with a space.
`audiences`	string	The alphabetically first audience name of the contact.
`unsubscribed`	boolean
`created_at`	date
`updated_at`	date
`audience_id`	string	Only `exact` and `not_exact`. The value is an audience ID.
`custom_fields.<key>`	string	Replace `<key>` with a custom field key. Values compare as text.

The older filter[audience_id], filter[unsubscribed] and filter[custom_fields][<key>] parameters still work.

Returns

dataobject[]

The contacts on this page, each with audiences as id, name and subscribed. See Retrieve a contact.

total_recordsinteger

The number of contacts that match, across all pages.

next_page_urlstring | null

Path of the next page with your filters, or null. See Pagination.

previous_page_urlstring | null

Path of the previous page, or null.

GET/contacts

JavaScript

import { Emailit } from '@emailit/node';
const emailit = new Emailit('your_api_key');

const contacts = await emailit.contacts.list();

Python

from emailit import EmailitClient
client = EmailitClient("your_api_key")

contacts = client.contacts.list()

PHP

$emailit = Emailit::client('your_api_key');

$contacts = $emailit->contacts()->list();

Ruby

require "emailit"
client = Emailit::EmailitClient.new("your_api_key")

contacts = client.contacts.list

import "github.com/emailit/emailit-go/v2"
client := emailit.NewClient("your_api_key")

contacts, err := client.Contacts.List(nil)

Rust

use emailit::Emailit;

let emailit = Emailit::new("your_api_key");

let contacts = emailit.contacts.list(None).await?;

Java

import com.emailit.*;

EmailitClient emailit = new EmailitClient("your_api_key");

EmailitObject contacts = emailit.contacts().list();

using Emailit;

var emailit = new EmailitClient("your_api_key");

var contacts = emailit.Contacts.List();

PHP

use Emailit\Laravel\Facades\Emailit;

$contacts = Emailit::contacts()->list();

Terminal

curl https://api.emailit.com/v2/contacts \
  -H "Authorization: Bearer $EMAILIT_API_KEY"

Terminal

curl -G https://api.emailit.com/v2/contacts \
  -H "Authorization: Bearer $EMAILIT_API_KEY" \
  --data-urlencode "audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2" \
  --data-urlencode "custom_fields.plan.exact=pro" \
  --data-urlencode "sort=email" \
  --data-urlencode "order=asc" \
  --data-urlencode "limit=100"

JSON

{
  "data": [
    {
      "object": "contact",
      "id": "con_4K9kQdrXth7am0TPKvPrR5yd2oo",
      "email": "ada@example.com",
      "first_name": "Ada",
      "last_name": "Lovelace",
      "custom_fields": {
        "company": "Analytical Engines",
        "plan": "pro"
      },
      "unsubscribed": false,
      "audiences": [
        {
          "id": "aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2",
          "name": "Newsletter",
          "subscribed": true
        }
      ],
      "created_at": "2026-10-01T10:20:31.704113Z",
      "updated_at": "2026-10-01T10:20:31.704113Z"
    },
    {
      "object": "contact",
      "id": "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7",
      "email": "grace@example.com",
      "first_name": "Grace",
      "last_name": "Hopper",
      "custom_fields": {},
      "unsubscribed": true,
      "audiences": [],
      "created_at": "2026-09-28T07:55:02.118342Z",
      "updated_at": "2026-09-30T18:11:40.902215Z"
    }
  ],
  "total_records": 2,
  "next_page_url": null,
  "previous_page_url": null
}

Bulk update contacts

Runs one action on up to 100 contacts in a single request.

POST/contacts/bulk

Requires a full API key. Every ID must belong to a contact in the workspace, otherwise nothing is changed and the response lists the missing IDs. Each contact fires the same events as the single-contact endpoints. If the audience reaches your plan’s subscriber limit during add_to_audience, the request stops with 422, and the contacts processed before that stay added.

Action	What it does
`delete`	Deletes the contacts and their audience memberships, like Delete a contact.
`add_to_audience`	Adds the contacts to `audience_id`. Contacts already in it are left as they are.
`remove_from_audience`	Removes the contacts from `audience_id`.
`unsubscribe`	Sets `unsubscribed` to `true`, so campaigns skip the contacts.
`resubscribe`	Sets `unsubscribed` to `false`.

Body parameters

actionstringrequired

delete, add_to_audience, remove_from_audience, unsubscribe or resubscribe.

idsstring[]required

Contact IDs (con_…), from 1 to 100. Email addresses aren’t accepted here. Duplicates are ignored.

audience_idstring

The audience ID. Required for add_to_audience and remove_from_audience.

Returns

objectstring

Always contact_bulk.

actionstring

The action that ran.

processedinteger

How many contacts were processed.

idsstring[]

The contact IDs that were processed.

POST/contacts/bulk

JavaScript

const response = await fetch('https://api.emailit.com/v2/contacts/bulk', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer your_api_key',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({"action": "add_to_audience", "ids": ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"], "audience_id": "aud_4KOlh9t2uw5od4qypqCtyrZyDq2"}),
});
const result = await response.json();

Python

import requests

response = requests.post(
  "https://api.emailit.com/v2/contacts/bulk",
  headers={"Authorization": "Bearer your_api_key"},
  json={"action": "add_to_audience", "ids": ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"], "audience_id": "aud_4KOlh9t2uw5od4qypqCtyrZyDq2"}
)
result = response.json()

PHP

$ch = curl_init('https://api.emailit.com/v2/contacts/bulk');
curl_setopt_array($ch, [
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_HTTPHEADER => [
    'Authorization: Bearer your_api_key',
    'Content-Type: application/json',
  ],
  CURLOPT_POSTFIELDS => json_encode(['action' => 'add_to_audience', 'ids' => ['con_4K9kQdrXth7am0TPKvPrR5yd2oo', 'con_4KiXIs4xLTcJIAHnKJaLcnMZYh7'], 'audience_id' => 'aud_4KOlh9t2uw5od4qypqCtyrZyDq2']),
]);
$result = json_decode(curl_exec($ch), true);
curl_close($ch);

Ruby

require "net/http"
require "json"

uri = URI("https://api.emailit.com/v2/contacts/bulk")
req = Net::HTTP::Post.new(uri)
req["Authorization"] = "Bearer your_api_key"
req["Content-Type"] = "application/json"
req.body = { action: "add_to_audience", ids: ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"], audience_id: "aud_4KOlh9t2uw5od4qypqCtyrZyDq2" }.to_json
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
result = JSON.parse(http.request(req).body)

payload := strings.NewReader(`{"action": "add_to_audience", "ids": ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"], "audience_id": "aud_4KOlh9t2uw5od4qypqCtyrZyDq2"}`)
req, _ := http.NewRequest("POST", "https://api.emailit.com/v2/contacts/bulk", payload)
req.Header.Set("Authorization", "Bearer your_api_key")
req.Header.Set("Content-Type", "application/json")

resp, err := http.DefaultClient.Do(req)
if err != nil {
  return err
}
defer resp.Body.Close()

Rust

let response = reqwest::Client::new()
    .post("https://api.emailit.com/v2/contacts/bulk")
    .bearer_auth("your_api_key")
    .json(&serde_json::json!({"action": "add_to_audience", "ids": ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"], "audience_id": "aud_4KOlh9t2uw5od4qypqCtyrZyDq2"}))
    .send()
    .await?;

Java

import java.net.http.*;
import java.net.URI;

HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
  .uri(URI.create("https://api.emailit.com/v2/contacts/bulk"))
  .header("Authorization", "Bearer your_api_key")
  .header("Content-Type", "application/json")
  .POST(HttpRequest.BodyPublishers.ofString("{\"action\": \"add_to_audience\", \"ids\": [\"con_4K9kQdrXth7am0TPKvPrR5yd2oo\", \"con_4KiXIs4xLTcJIAHnKJaLcnMZYh7\"], \"audience_id\": \"aud_4KOlh9t2uw5od4qypqCtyrZyDq2\"}"))
  .build();
HttpResponse<String> response = client.send(request,
  HttpResponse.BodyHandlers.ofString());

using System.Net.Http.Headers;
using System.Text;

var http = new HttpClient();
http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "your_api_key");

var content = new StringContent(@"{""action"": ""add_to_audience"", ""ids"": [""con_4K9kQdrXth7am0TPKvPrR5yd2oo"", ""con_4KiXIs4xLTcJIAHnKJaLcnMZYh7""], ""audience_id"": ""aud_4KOlh9t2uw5od4qypqCtyrZyDq2""}", Encoding.UTF8, "application/json");
var response = await http.PostAsync("https://api.emailit.com/v2/contacts/bulk", content);

PHP

use Illuminate\Support\Facades\Http;

$result = Http::withToken('your_api_key')
  ->post('https://api.emailit.com/v2/contacts/bulk', ['action' => 'add_to_audience', 'ids' => ['con_4K9kQdrXth7am0TPKvPrR5yd2oo', 'con_4KiXIs4xLTcJIAHnKJaLcnMZYh7'], 'audience_id' => 'aud_4KOlh9t2uw5od4qypqCtyrZyDq2'])
  ->json();

Terminal

curl -X POST https://api.emailit.com/v2/contacts/bulk \
  -H "Authorization: Bearer $EMAILIT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"action": "add_to_audience", "ids": ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"], "audience_id": "aud_4KOlh9t2uw5od4qypqCtyrZyDq2"}'

JSON

{
  "object": "contact_bulk",
  "action": "add_to_audience",
  "processed": 2,
  "ids": ["con_4K9kQdrXth7am0TPKvPrR5yd2oo", "con_4KiXIs4xLTcJIAHnKJaLcnMZYh7"]
}

JSON

{
  "error": "A maximum of 100 contacts can be updated per request"
}

JSON

{
  "error": "One or more contacts were not found",
  "missing": ["con_4K3pZc1Q9nWm2LrT8vYb5Hd0XaE"]
}

JSON

{
  "error": "Pro includes 50,000 subscribers per audience.",
  "usage": {
    "used": 50000,
    "limit": 50000,
    "plan": "pro"
  }
}

Export contacts

Downloads matching contacts as a CSV or XLSX file.

GET/contacts/export

Requires a full API key. Accepts the same search, filter and sort parameters as List contacts, passed in the query string, without pagination. POST /contacts/export works the same way. An export can include up to 10,000 contacts; if more match, the request returns 422, so narrow the filters.

Query parameters

formatstringdefault: csv

csv or xlsx.

search, audience_id, unsubscribed, sort, order, match, key.conditionstring

The same parameters as List contacts.

Returns

Returns the file as an attachment: contacts.csv (text/csv; charset=utf-8) or contacts.xlsx. Each row is a contact with these columns:

Column	Contains
`email`	The email address.
`first_name`, `last_name`	The names.
`unsubscribed`	`true` or `false`.
`audiences`	The contact’s audience names, separated by `;` .
One column per custom field	The value for each custom field defined in the workspace, named by its key. Lists are joined with `;`.
`created_at`, `updated_at`	ISO 8601 timestamps.

GET/contacts/export

JavaScript

import { writeFile } from 'node:fs/promises';

const response = await fetch('https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2', {
  headers: { Authorization: 'Bearer your_api_key' },
});
await writeFile('contacts.csv', Buffer.from(await response.arrayBuffer()));

Python

import requests

response = requests.get(
  "https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2",
  headers={"Authorization": "Bearer your_api_key"}
)
with open("contacts.csv", "wb") as f:
    f.write(response.content)

PHP

$ch = curl_init('https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2');
curl_setopt_array($ch, [
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_HTTPHEADER => [
    'Authorization: Bearer your_api_key',
  ],
]);
file_put_contents('contacts.csv', curl_exec($ch));
curl_close($ch);

Ruby

require "net/http"

uri = URI("https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2")
req = Net::HTTP::Get.new(uri)
req["Authorization"] = "Bearer your_api_key"
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
File.binwrite("contacts.csv", http.request(req).body)

req, _ := http.NewRequest("GET", "https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2", nil)
req.Header.Set("Authorization", "Bearer your_api_key")

resp, err := http.DefaultClient.Do(req)
if err != nil {
  return err
}
defer resp.Body.Close()

out, _ := os.Create("contacts.csv")
defer out.Close()
io.Copy(out, resp.Body)

Rust

let bytes = reqwest::Client::new()
    .get("https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2")
    .bearer_auth("your_api_key")
    .send()
    .await?
    .bytes()
    .await?;
std::fs::write("contacts.csv", &bytes)?;

Java

import java.net.http.*;
import java.net.URI;
import java.nio.file.Path;

HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
  .uri(URI.create("https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2"))
  .header("Authorization", "Bearer your_api_key")
  .GET()
  .build();
client.send(request, HttpResponse.BodyHandlers.ofFile(Path.of("contacts.csv")));

using System.Net.Http.Headers;

var http = new HttpClient();
http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "your_api_key");

var bytes = await http.GetByteArrayAsync("https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2");
await File.WriteAllBytesAsync("contacts.csv", bytes);

PHP

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Storage;

$csv = Http::withToken('your_api_key')
  ->get('https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2')
  ->body();
Storage::put('contacts.csv', $csv);

Terminal

curl "https://api.emailit.com/v2/contacts/export?format=csv&audience_id=aud_4KbFmQPy1feMCGAY8F8pAhiZ1u2" \
  -H "Authorization: Bearer $EMAILIT_API_KEY" \
  -o contacts.csv

Text

email,first_name,last_name,unsubscribed,audiences,company,plan,created_at,updated_at
ada@example.com,Ada,Lovelace,false,Newsletter,Analytical Engines,pro,2026-10-01T10:20:31.000000Z,2026-10-01T10:20:31.000000Z

JSON

{
  "error": "format must be csv or xlsx"
}

JSON

{
  "error": "Export is limited to 10000 contacts. Narrow your filters and try again."
}

Delete a contact

Permanently deletes a contact and all of its audience memberships.

DELETE/contacts/{id}

Requires a full API key. The delete can’t be undone. To stop emailing someone but keep their record, update the contact with unsubscribed: true, or add the address to your suppressions. Fires subscriber.deleted for each membership, then contact.deleted.

Path parameters

idstringrequired

The contact ID (con_…) or the contact’s email address, URL-encoded.

Returns

objectstring

Always contact.

idstring

The ID of the deleted contact.

emailstring

The contact’s email address.

deletedboolean

Always true.

DELETE/contacts/{id}

JavaScript

import { Emailit } from '@emailit/node';
const emailit = new Emailit('your_api_key');

await emailit.contacts.delete('con_4Kt4ZXloQR8WGcMsYx8PFCUjokM');

Python

from emailit import EmailitClient
client = EmailitClient("your_api_key")

client.contacts.delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM")

PHP

$emailit = Emailit::client('your_api_key');

$emailit->contacts()->delete('con_4Kt4ZXloQR8WGcMsYx8PFCUjokM');

Ruby

require "emailit"
client = Emailit::EmailitClient.new("your_api_key")

client.contacts.delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM")

import "github.com/emailit/emailit-go/v2"
client := emailit.NewClient("your_api_key")

err := client.Contacts.Delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM")

Rust

use emailit::Emailit;

let emailit = Emailit::new("your_api_key");

emailit.contacts.delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM").await?;

Java

import com.emailit.*;

EmailitClient emailit = new EmailitClient("your_api_key");

emailit.contacts().delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM");

using Emailit;

var emailit = new EmailitClient("your_api_key");

emailit.Contacts.Delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM");

PHP

use Emailit\Laravel\Facades\Emailit;

Emailit::contacts()->delete('con_4Kt4ZXloQR8WGcMsYx8PFCUjokM');

Terminal

curl -X DELETE https://api.emailit.com/v2/contacts/con_4Kt4ZXloQR8WGcMsYx8PFCUjokM \
  -H "Authorization: Bearer $EMAILIT_API_KEY"

JSON

{
  "object": "contact",
  "id": "con_4Kt4ZXloQR8WGcMsYx8PFCUjokM",
  "email": "alan@example.com",
  "deleted": true
}

JSON

{
  "error": "Contact not found"
}