Instantly API
Use the Instantly API via direct curl calls to automate cold email outreach, manage campaigns, leads, and sending accounts.
Official docs: https://developer.instantly.ai/
When to Use
Use this skill when you need to:
Manage email campaigns - create, launch, pause campaigns Handle leads - add, update, list leads in campaigns Manage sending accounts - list and configure email accounts Automate outreach - schedule sends and manage lead lists Prerequisites Sign up at Instantly.ai (Growth plan or above required for API) Go to Settings > Integrations > API to create an API key Select appropriate scopes for your use case export INSTANTLY_API_KEY="your-api-key"
API Scopes
Create API keys with specific permissions:
campaigns:read, campaigns:create, campaigns:update leads:read, leads:create, leads:update, leads:delete lead_lists:read, lead_lists:create analytics:read all:all (full access)
Important: When using $VAR in a command that pipes to another command, wrap the command containing $VAR in bash -c '...'. Due to a Claude Code bug, environment variables are silently cleared when pipes are used directly.
bash -c 'curl -s "https://api.example.com" -H "Authorization: Bearer $API_KEY"' | jq '.items[] | {id, name}'
How to Use
All examples below assume you have INSTANTLY_API_KEY set.
The base URL for API V2 is:
https://api.instantly.ai/api/v2
Authentication uses Bearer token in the Authorization header.
- List Campaigns
Get all campaigns:
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns" -H "Authorization: Bearer ${INSTANTLY_API_KEY}"' | jq '.items[] | {id, name, status}'
With filters:
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns?status=ACTIVE&limit=10" -H "Authorization: Bearer ${INSTANTLY_API_KEY}"' | jq '.items[] | {id, name}'
Status values: ACTIVE, PAUSED, COMPLETED, DRAFTED
- Get Single Campaign
Get campaign details by ID. Replace
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns/
- Create Campaign
Create a new campaign (requires campaign_schedule):
Write to /tmp/instantly_request.json:
{ "name": "My New Campaign", "daily_limit": 50, "campaign_schedule": { "schedules": [ { "name": "Weekday Schedule", "timezone": "America/Chicago", "days": { "monday": true, "tuesday": true, "wednesday": true, "thursday": true, "friday": true, "saturday": false, "sunday": false }, "timing": { "from": "09:00", "to": "17:00" } } ] } }
Then run:
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns" -X POST -H "Authorization: Bearer ${INSTANTLY_API_KEY}" -H "Content-Type: application/json" -d @/tmp/instantly_request.json'
- Pause/Activate Campaign
Control campaign status. Replace
Pause campaign
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns/
Activate campaign
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns/
- List Leads
List leads (POST endpoint due to complex filters):
Write to /tmp/instantly_request.json:
{ "limit": 10 }
Then run:
bash -c 'curl -s "https://api.instantly.ai/api/v2/leads/list" -X POST -H "Authorization: Bearer ${INSTANTLY_API_KEY}" -H "Content-Type: application/json" -d @/tmp/instantly_request.json' | jq '.items[] | {id, email, first_name, last_name}'
Filter by campaign:
Write to /tmp/instantly_request.json:
{ "campaign_id": "your-campaign-id", "limit": 20 }
Then run:
bash -c 'curl -s "https://api.instantly.ai/api/v2/leads/list" -X POST -H "Authorization: Bearer ${INSTANTLY_API_KEY}" -H "Content-Type: application/json" -d @/tmp/instantly_request.json' | jq '.items[] | {email, status}'
- Create Lead
Add a single lead:
Write to /tmp/instantly_request.json:
{ "email": "john@example.com", "first_name": "John", "last_name": "Doe", "company_name": "Acme Corp", "campaign_id": "your-campaign-id" }
Then run:
bash -c 'curl -s "https://api.instantly.ai/api/v2/leads" -X POST -H "Authorization: Bearer ${INSTANTLY_API_KEY}" -H "Content-Type: application/json" -d @/tmp/instantly_request.json'
With custom variables:
Write to /tmp/instantly_request.json:
{ "email": "jane@example.com", "first_name": "Jane", "campaign_id": "your-campaign-id", "custom_variables": { "role": "CTO", "industry": "SaaS" } }
Then run:
bash -c 'curl -s "https://api.instantly.ai/api/v2/leads" -X POST -H "Authorization: Bearer ${INSTANTLY_API_KEY}" -H "Content-Type: application/json" -d @/tmp/instantly_request.json'
- Get Single Lead
Get lead by ID. Replace
bash -c 'curl -s "https://api.instantly.ai/api/v2/leads/
- Update Lead
Update lead information:
Write to /tmp/instantly_request.json:
{ "first_name": "Updated Name", "custom_variables": { "notes": "High priority" } }
Then run. Replace
bash -c 'curl -s "https://api.instantly.ai/api/v2/leads/
- List Lead Lists
Get all lead lists:
bash -c 'curl -s "https://api.instantly.ai/api/v2/lead-lists" -H "Authorization: Bearer ${INSTANTLY_API_KEY}"' | jq '.items[] | {id, name}'
- Create Lead List
Create a new lead list:
Write to /tmp/instantly_request.json:
{ "name": "Q1 Prospects" }
Then run:
bash -c 'curl -s "https://api.instantly.ai/api/v2/lead-lists" -X POST -H "Authorization: Bearer ${INSTANTLY_API_KEY}" -H "Content-Type: application/json" -d @/tmp/instantly_request.json'
- List Email Accounts
Get connected sending accounts:
bash -c 'curl -s "https://api.instantly.ai/api/v2/accounts" -H "Authorization: Bearer ${INSTANTLY_API_KEY}"' | jq '.items[] | {email, status, warmup_status}'
- Test API Key
Verify your API key is valid:
bash -c 'curl -s "https://api.instantly.ai/api/v2/api-keys" -H "Authorization: Bearer ${INSTANTLY_API_KEY}"' | jq '.items[0] | {name, scopes}'
Pagination
List endpoints support pagination:
First page
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns?limit=10" -H "Authorization: Bearer ${INSTANTLY_API_KEY}"' | jq '{items: .items | length, next_starting_after: .next_starting_after}'
Next page (replace with the next_starting_after value from the previous response)
bash -c 'curl -s "https://api.instantly.ai/api/v2/campaigns?limit=10&starting_after=
Guidelines Use API V2: V1 is deprecated, use V2 endpoints only Bearer token auth: Always use Authorization: Bearer header Scope your keys: Create keys with minimal required permissions Custom variables: Values must be string, number, boolean, or null (no objects/arrays) Leads list is POST: Due to complex filters, listing leads uses POST not GET Rate limits: Respect rate limits based on your plan tier Growth plan required: API access requires Growth plan or above