# Contacts API

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

Base URL: `https://api.emailit.com/v2`. Authenticate with `Authorization: Bearer <API key>`.

## Create a contact — POST /contacts

> Create a contact with an email address, names and custom fields, and optionally subscribe it to one or more audiences at once.

# 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](/docs/contacts/).

## Body parameters

- `email` (string, required): The contact's email address.

- `first_name` (string): The first name.

- `last_name` (string): The last name.

- `custom_fields` (object): Values by [custom field](/docs/contacts/custom-fields/) 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.

- `audiences` (string[]): IDs of audiences (`aud_…`) to subscribe the contact to. IDs that don't exist in the workspace are skipped.

- `unsubscribed` (boolean): `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](/docs/api-reference/contacts/get/) for all fields.

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

**Request** `POST /contacts`

**Node.js**

```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**

```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**

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

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

**Ruby**

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

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

**Go**

```go
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**

```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**

```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()
);
```

**.NET**

```csharp
using Emailit;

var emailit = new EmailitClient("your_api_key");

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

**Laravel**

```php
use Emailit\Laravel\Facades\Emailit;

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

**cURL**

```bash
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"]
  }'
```

**201**

```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"
}
```

**400**

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

**409**

```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"
  }
}
```

**422**

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

---
Source: https://emailit.com/docs/api-reference/contacts/create/

## Retrieve a contact — GET /contacts/{id}

> Retrieve a contact by ID or email address with its custom fields and every audience membership, including subscription dates.

# Retrieve a contact

Retrieves a contact with its custom fields and audience memberships.

`GET /contacts/{id}`

Requires a `full` API key.

## Path parameters

- `id` (string, required): The contact ID (`con_…`) or the contact's email address, URL-encoded.

## Returns

Returns the contact object.

- `object` (string): Always `contact`.

- `id` (string): The contact ID.

- `email` (string): The email address, in lowercase.

- `first_name` (string | null): The first name.

- `last_name` (string | null): The last name.

- `custom_fields` (object): Custom field values by key. `{}` when there are none.

- `unsubscribed` (boolean): `true` if the contact unsubscribed from all campaigns.

- `audiences` (object[]): 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_at` (string): When the contact was created.

- `updated_at` (string): When the contact was last changed.

**Request** `GET /contacts/{id}`

**Node.js**

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

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

**Python**

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

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

**PHP**

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

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

**Ruby**

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

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

**Go**

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

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

**Rust**

```rust
use emailit::Emailit;

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

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

**Java**

```java
import com.emailit.*;

EmailitClient emailit = new EmailitClient("your_api_key");

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

**.NET**

```csharp
using Emailit;

var emailit = new EmailitClient("your_api_key");

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

**Laravel**

```php
use Emailit\Laravel\Facades\Emailit;

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

**cURL**

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

**200**

```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"
}
```

**404**

```json
{
  "error": "Contact not found"
}
```

---
Source: https://emailit.com/docs/api-reference/contacts/get/

## Update a contact — POST /contacts/{id}

> Change a contact's email address, names, custom fields or unsubscribed status, or replace the audiences it belongs to.

# 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

- `id` (string, required): The contact ID (`con_…`) or the contact's email address, URL-encoded.

## Body parameters

- `email` (string): A new email address. Must not belong to another contact.

- `first_name` (string): The first name.

- `last_name` (string): The last name.

- `custom_fields` (object): Custom field values by key. Replaces all of the contact's custom fields, so include the ones you want to keep.

- `unsubscribed` (boolean): `true` to unsubscribe the contact from all campaigns, `false` to resubscribe. Existing audience memberships keep their own status.

- `audiences` (string[]): 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](/docs/api-reference/audiences/subscribers/add/) or [Delete a subscriber](/docs/api-reference/audiences/subscribers/delete/).

## Returns

Returns the updated contact in the same format as [Retrieve a contact](/docs/api-reference/contacts/get/). A request without any of these fields returns `400`.

**Request** `POST /contacts/{id}`

**Node.js**

```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**

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

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

**PHP**

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

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

**Ruby**

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

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

**Go**

```go
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**

```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**

```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()
);
```

**.NET**

```csharp
using Emailit;

var emailit = new EmailitClient("your_api_key");

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

**Laravel**

```php
use Emailit\Laravel\Facades\Emailit;

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

**cURL**

```bash
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"}'
```

**cURL**

```bash
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"]
  }'
```

**200**

```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"
}
```

**400**

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

**404**

```json
{
  "error": "Contact not found"
}
```

**409**

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

---
Source: https://emailit.com/docs/api-reference/contacts/update/

## List contacts — GET /contacts

> List the contacts of a workspace, newest first, filtered by audience, subscription status, custom fields or any contact field.

# List contacts

Returns a page of contacts, newest first.

`GET /contacts`

Requires a `full` API key. Use the same parameters with [Export contacts](/docs/api-reference/contacts/export/) to download every match as a file.

## Query parameters

- `page` (integer): The page to return.

- `limit` (integer): Contacts per page, from 1 to 100.

- `search` (string): Case-insensitive match on the email address, first name or last name. `q` works too.

- `audience_id` (string): Only contacts in this audience (`aud_…`).

- `unsubscribed` (boolean): `true` or `false`. Only contacts with this unsubscribed status.

- `sort` (string): `email`, `first_name`, `last_name`, `name`, `audiences`, `created_at` or `updated_at`.

- `order` (string): `asc` or `desc`. On this endpoint `order` is the sort direction, not the sort key.

- `match` (string): `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](/docs/api-reference/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

- `data` (object[]): The contacts on this page, each with `audiences` as `id`, `name` and `subscribed`. See [Retrieve a contact](/docs/api-reference/contacts/get/).

- `total_records` (integer): The number of contacts that match, across all pages.

- `next_page_url` (string | null): Path of the next page with your filters, or `null`. See [Pagination](/docs/api-reference/pagination/).

- `previous_page_url` (string | null): Path of the previous page, or `null`.

**Request** `GET /contacts`

**Node.js**

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

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

**Python**

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

contacts = client.contacts.list()
```

**PHP**

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

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

**Ruby**

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

contacts = client.contacts.list
```

**Go**

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

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

**Rust**

```rust
use emailit::Emailit;

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

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

**Java**

```java
import com.emailit.*;

EmailitClient emailit = new EmailitClient("your_api_key");

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

**.NET**

```csharp
using Emailit;

var emailit = new EmailitClient("your_api_key");

var contacts = emailit.Contacts.List();
```

**Laravel**

```php
use Emailit\Laravel\Facades\Emailit;

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

**cURL**

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

**cURL**

```bash
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"
```

**200**

```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
}
```

---
Source: https://emailit.com/docs/api-reference/contacts/list/

## Bulk update contacts — POST /contacts/bulk

> Apply one action to up to 100 contacts at once: delete them, add them to or remove them from an audience, unsubscribe or resubscribe them.

# 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](/docs/api-reference/contacts/delete/). |
| `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

- `action` (string, required): `delete`, `add_to_audience`, `remove_from_audience`, `unsubscribe` or `resubscribe`.

- `ids` (string[], required): Contact IDs (`con_…`), from 1 to 100. Email addresses aren't accepted here. Duplicates are ignored.

- `audience_id` (string): The audience ID. Required for `add_to_audience` and `remove_from_audience`.

## Returns

- `object` (string): Always `contact_bulk`.

- `action` (string): The action that ran.

- `processed` (integer): How many contacts were processed.

- `ids` (string[]): The contact IDs that were processed.

**Request** `POST /contacts/bulk`

**Node.js**

```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**

```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**

```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**

```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)
```

**Go**

```go
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**

```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**

```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());
```

**.NET**

```csharp
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);
```

**Laravel**

```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();
```

**cURL**

```bash
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"}'
```

**200**

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

**400**

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

**404**

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

**422**

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

---
Source: https://emailit.com/docs/api-reference/contacts/bulk/

## Export contacts — GET /contacts/export

> Download the contacts that match your filters as a CSV or Excel file, with their audiences and custom fields. Up to 10,000 contacts.

# 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](/docs/api-reference/contacts/list/), 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

- `format` (string): `csv` or `xlsx`.

- `search, audience_id, unsubscribed, sort, order, match, key.condition` (string): The same parameters as [List contacts](/docs/api-reference/contacts/list/).

## 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. |

**Request** `GET /contacts/export`

**Node.js**

```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**

```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**

```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**

```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)
```

**Go**

```go
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**

```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**

```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")));
```

**.NET**

```csharp
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);
```

**Laravel**

```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);
```

**cURL**

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

**200**

```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
```

**400**

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

**422**

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

---
Source: https://emailit.com/docs/api-reference/contacts/export/

## Delete a contact — DELETE /contacts/{id}

> Permanently delete a contact and remove it from every audience. Emails already sent to it stay in your logs.

# 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](/docs/api-reference/contacts/update/) with `unsubscribed: true`, or add the address to your [suppressions](/docs/api-reference/suppressions/create/). Fires `subscriber.deleted` for each membership, then `contact.deleted`.

## Path parameters

- `id` (string, required): The contact ID (`con_…`) or the contact's email address, URL-encoded.

## Returns

- `object` (string): Always `contact`.

- `id` (string): The ID of the deleted contact.

- `email` (string): The contact's email address.

- `deleted` (boolean): Always `true`.

**Request** `DELETE /contacts/{id}`

**Node.js**

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

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

**Python**

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

client.contacts.delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM")
```

**PHP**

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

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

**Ruby**

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

client.contacts.delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM")
```

**Go**

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

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

**Rust**

```rust
use emailit::Emailit;

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

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

**Java**

```java
import com.emailit.*;

EmailitClient emailit = new EmailitClient("your_api_key");

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

**.NET**

```csharp
using Emailit;

var emailit = new EmailitClient("your_api_key");

emailit.Contacts.Delete("con_4Kt4ZXloQR8WGcMsYx8PFCUjokM");
```

**Laravel**

```php
use Emailit\Laravel\Facades\Emailit;

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

**cURL**

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

**200**

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

**404**

```json
{
  "error": "Contact not found"
}
```

---
Source: https://emailit.com/docs/api-reference/contacts/delete/