Instantly

Access the Instantly API v2 with managed authentication. Manage cold email campaigns, leads, sending accounts, and view analytics.

Quick Start

# List campaigns
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/instantly/api/v2/campaigns?limit=10')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://api.maton.ai/instantly/{native-api-path}

Maton proxies requests to api.instantly.ai and automatically injects your API key.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

1. Sign in or create an account at maton.ai
2. Go to maton.ai/settings
3. Copy your API key

Connection Management

Manage your Instantly connections at https://api.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=instantly&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'instantly'}).encode()
req = urllib.request.Request('https://api.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "connection": {
    "connection_id": "{connection_id}",
    "status": "ACTIVE",
    "creation_time": "2026-02-11T22:19:35.798712Z",
    "last_updated_time": "2026-02-11T22:20:15.702846Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "instantly",
    "metadata": {}
  }
}

Open the returned url in a browser to complete authorization.

Delete Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple Instantly connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/instantly/api/v2/campaigns')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '{connection_id}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If you have multiple connections, always include this header to ensure requests go to the intended account.

Security & Permissions

• Access is scoped to campaigns, leads, accounts, and email analytics within the connected Instantly account.
• All write operations require explicit user approval. Before executing any create, update, or delete call, confirm the target resource and intended effect with the user.

API Reference

Campaigns

List Campaigns

GET /instantly/api/v2/campaigns?limit=10&status=1&search=keyword

Query parameters:

• limit - Number of results (default: 10)
• status - Campaign status filter (0=draft, 1=active, 2=paused, 3=completed)
• search - Search by campaign name
• starting_after - Cursor for pagination

Get Campaign

GET /instantly/api/v2/campaigns/{campaign_id}

Create Campaign

POST /instantly/api/v2/campaigns
Content-Type: application/json

{
  "name": "My Campaign",
  "campaign_schedule": {
    "schedules": [
      {
        "name": "My Schedule",
        "timing": {
          "from": "09:00",
          "to": "17:00"
        },
        "days": {
          "0": true,
          "1": true,
          "2": true,
          "3": true,
          "4": true
        },
        "timezone": "Etc/GMT+5"
      }
    ]
  }
}

Note: Timezone must use Etc/GMT format (e.g., "Etc/GMT+5", "Etc/GMT-8", "Etc/GMT+12").

#### Activate Campaign

POST /instantly/api/v2/campaigns/{campaign_id}/activate

#### Pause Campaign

POST /instantly/api/v2/campaigns/{campaign_id}/pause

#### Delete Campaign

DELETE /instantly/api/v2/campaigns/{campaign_id}

#### Search Campaigns by Lead Email

GET /instantly/api/v2/campaigns/search-by-contact?search=lead@example.com

### Leads

#### Create Lead

POST /instantly/api/v2/leads

Content-Type: application/json

{

"campaign_id": "019bb3bd-9963-789e-b776-6c6927ef3f79",

"email": "lead@example.com",

"first_name": "John",

"last_name": "Doe",

"company_name": "Acme Inc",

"variables": {

"custom_field": "custom_value"

}

}

#### Bulk Add Leads

POST /instantly/api/v2/leads

Content-Type: application/json

{

"campaign_id": "019bb3bd-9963-789e-b776-6c6927ef3f79",

"leads": [

{

"email": "lead1@example.com",

"first_name": "John"

},

{

"email": "lead2@example.com",

"first_name": "Jane"

}

]

}

#### List Leads

Note: This is a POST endpoint due to complex filtering requirements.

POST /instantly/api/v2/leads/list

Content-Type: application/json

{

"campaign_id": "019bb3bd-9963-789e-b776-6c6927ef3f79",

"limit": 100

}

#### Get Lead

GET /instantly/api/v2/leads/{lead_id}

#### Delete Lead

DELETE /instantly/api/v2/leads/{lead_id}

#### Move Leads

POST /instantly/api/v2/leads/move

Content-Type: application/json

{

"lead_ids": ["lead_id_1", "lead_id_2"],

"to_campaign_id": "target_campaign_id"

}

### Lead Lists

#### List Lead Lists

GET /instantly/api/v2/lead-lists?limit=10

#### Create Lead List

POST /instantly/api/v2/lead-lists

Content-Type: application/json

{

"name": "My Lead List"

}

#### Get Lead List

GET /instantly/api/v2/lead-lists/{list_id}

#### Update Lead List

PATCH /instantly/api/v2/lead-lists/{list_id}

Content-Type: application/json

{

"name": "Updated List Name"

}

#### Delete Lead List

DELETE /instantly/api/v2/lead-lists/{list_id}

### Accounts (Sending Email Accounts)

#### List Accounts

GET /instantly/api/v2/accounts?limit=10

#### Get Account

GET /instantly/api/v2/accounts/{email}

#### Create Account

POST /instantly/api/v2/accounts

Content-Type: application/json

{

"email": "sender@example.com",

"first_name": "John",

"last_name": "Doe",

"provider_code": "google",

"smtp_host": "smtp.gmail.com",

"smtp_port": 587,

"smtp_username": "sender@example.com",

"smtp_password": "app_password",

"imap_host": "imap.gmail.com",

"imap_port": 993,

"imap_username": "sender@example.com",

"imap_password": "app_password"

}

#### Update Account

PATCH /instantly/api/v2/accounts/{email}

Content-Type: application/json

{

"first_name": "Jane"

}

#### Delete Account

DELETE /instantly/api/v2/accounts/{email}

#### Enable Warmup

POST /instantly/api/v2/accounts/warmup/enable

Content-Type: application/json

{

"emails": ["account1@example.com", "account2@example.com"]

}

#### Disable Warmup

POST /instantly/api/v2/accounts/warmup/disable

Content-Type: application/json

{

"emails": ["account1@example.com"]

}

### Emails (Unibox)

#### List Emails

GET /instantly/api/v2/emails?limit=20

#### Get Email

GET /instantly/api/v2/emails/{email_id}

#### Reply to Email

POST /instantly/api/v2/emails/reply

Content-Type: application/json

{

"reply_to_uuid": "email_uuid",

"body": "Thank you for your response!"

}

#### Forward Email

POST /instantly/api/v2/emails/forward

Content-Type: application/json

{

"email_uuid": "email_uuid",

"to": "forward@example.com"

}

#### Mark Thread as Read

POST /instantly/api/v2/emails/threads/{thread_id}/mark-as-read

#### Get Unread Count

GET /instantly/api/v2/emails/unread/count

#### Update Email

PATCH /instantly/api/v2/emails/{email_id}

Content-Type: application/json

{

"is_read": true

}

#### Delete Email

DELETE /instantly/api/v2/emails/{email_id}

### Analytics

#### Get Campaign Analytics

GET /instantly/api/v2/campaigns/analytics?id={campaign_id}

Query parameters:
- `id` - Campaign ID (leave empty for all campaigns)
- `start_date` - Filter start date (YYYY-MM-DD)
- `end_date` - Filter end date (YYYY-MM-DD)
- `exclude_total_leads_count` - Set to true for faster response

#### Get Campaign Analytics Overview

GET /instantly/api/v2/campaigns/analytics/overview?id={campaign_id}

#### Get Daily Campaign Analytics

GET /instantly/api/v2/campaigns/analytics/daily?id={campaign_id}

#### Get Campaign Step Analytics

GET /instantly/api/v2/campaigns/analytics/steps?id={campaign_id}

#### Get Warmup Analytics

POST /instantly/api/v2/accounts/warmup/analytics

Content-Type: application/json

{

"emails": ["account@example.com"]

}

### Block List

#### List Block List Entries

GET /instantly/api/v2/block-lists-entries?limit=100

Query parameters:
- `domains_only` - Filter to domain entries only
- `search` - Search entries

#### Create Block List Entry

POST /instantly/api/v2/block-lists-entries

Content-Type: application/json

{

"bl_value": "blocked@example.com"

}

Or block a domain:

POST /instantly/api/v2/block-lists-entries

Content-Type: application/json

{

"bl_value": "blockeddomain.com"

}

#### Delete Block List Entry

DELETE /instantly/api/v2/block-lists-entries/{entry_id}

### Email Verification

#### Verify Email

GET /instantly/api/v2/email-verification/{email}

If verification takes longer than 10 seconds, status will be `pending`. Poll this endpoint to check status.

Response fields:
- `verification_status` - Use this field (not `status`) to determine verification result

### Background Jobs

#### Get Background Job Status

GET /instantly/api/v2/background-jobs/{job_id}

Query parameters:
- `data_fields` - Comma-separated fields (e.g., `success_count,failed_count,total_to_process`)

### Workspace

#### Get Current Workspace

GET /instantly/api/v2/workspaces/current

### Custom Tags

#### Toggle Tag on Resource

POST /instantly/api/v2/custom-tags/toggle-resource

Content-Type: application/json

{

"tag_id": "tag_uuid",

"resource_id": "campaign_or_account_id",

"resource_type": "campaign"

}

## Pagination

Instantly uses cursor-based pagination with `limit` and `starting_after`:

GET /instantly/api/v2/campaigns?limit=10&starting_after=cursor_value

Response includes pagination info:

{

"items": [...],

"next_starting_after": "cursor_for_next_page"

}

Use `next_starting_after` value in the next request's `starting_after` parameter.

## Code Examples

### JavaScript

const response = await fetch(

'https://api.maton.ai/instantly/api/v2/campaigns?limit=10',

{

headers: {

'Authorization': Bearer ${process.env.MATON_API_KEY}

}

}

);

const data = await response.json();

### Python

import os

import requests

response = requests.get(

'https://api.maton.ai/instantly/api/v2/campaigns',

headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},

params={'limit': 10}

)

data = response.json()

## Notes

- Instantly API v2 uses snake_case for all field names
- Lead custom variables must be string, number, boolean, or null (no objects/arrays)
- The List Leads endpoint is POST (not GET) due to complex filtering requirements
- Campaign status values: 0=draft, 1=active, 2=paused, 3=completed
- Email verification may return `pending` status if it takes longer than 10 seconds
- Warmup operations return background job IDs - poll the background jobs endpoint for status
- IMPORTANT: When using curl commands, use `curl -g` when URLs contain brackets to disable glob parsing
- IMPORTANT: When piping curl output to `jq`, environment variables may not expand correctly. Use Python examples instead.

## Error Handling

| Status | Meaning |
|--------|---------|
| 400 | Missing Instantly connection or invalid request |
| 401 | Invalid or missing Maton API key |
| 403 | Insufficient API key scopes |
| 429 | Rate limited |
| 4xx/5xx | Passthrough error from Instantly API |

### Troubleshooting: API Key Issues

1. Check that the `MATON_API_KEY` environment variable is set:

echo $MATON_API_KEY

2. Verify the API key is valid by listing connections:

python <<'EOF'

import urllib.request, os, json

req = urllib.request.Request('https://api.maton.ai/connections')

req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')

print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))

EOF

### Troubleshooting: Invalid App Name

1. Ensure your URL path starts with `instantly`. For example:

- Correct: `https://api.maton.ai/instantly/api/v2/campaigns`
- Incorrect: `https://api.maton.ai/api/v2/campaigns`

## Resources

- [Instantly API V2 Documentation](https://developer.instantly.ai/api/v2)
- [Instantly API Introduction](https://developer.instantly.ai/)
- [Instantly Help Center](https://help.instantly.ai/)
- [Maton Community](https://discord.com/invite/dBfFAcefs2)
- [Maton Support](mailto:support@maton.ai)