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Instantly for AI agents

Instantly automates cold email outreach, managing campaigns, leads, and inbox deliverability so sales and growth teams can run large outbound sequences without emails landing in spam. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect InstantlySee the 117 actions ↓
MarketingAPI keyMCP + RESTinstantly.ai
AUDIT LOG · INSTANTLYPOLICY: acme-support
09:41:07 · claude · u_8f2read
instantly.list_leads
List Leads✓ allowed · 212ms
09:41:08 · claude · u_8f2read
instantly.get_lead
Get Lead✓ allowed · 164ms
09:41:09 · claude · u_8f2write
instantly.create_lead
Create Lead✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
instantly.delete_lead
Delete Lead✕ blocked · policy: deny
EVERY INSTANTLY CALL, ON THE RECORD
01 · USE CASES

What agents do in Instantly.

01

Check campaign analytics

Pull an analytics overview for a campaign to report open and reply rates.

02

Add leads to a campaign

Add a batch of new leads to an active campaign so they enter the sending sequence.

03

Pause a campaign with confirmation

Deactivate a running campaign only after the sender confirms it should stop sending.

02 · ACTIONS

117 Instantly actions, graded by risk.

Every Instantly action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

53

Look things up. Allowed by default.

  • instantly.get_lead
    Get Lead
  • instantly.list_leads
    List Leads
  • instantly.get_webhook
    Get Webhook
  • instantly.list_emails
    List Emails
  • instantly.get_campaign
    Get Campaign
  • instantly.get_lead_list
    Get Lead List
  • instantly.list_accounts
    List Email Accounts
  • instantly.list_api_keys
    List API Keys (Deprecated)
  • instantly.list_webhooks
    List Webhooks
  • instantly.get_audit_logs
    Get Audit Logs
  • instantly.get_custom_tag
    Get Custom Tag
  • instantly.get_lead_label
    Get Lead Label
  • instantly.list_campaigns
    List Campaigns
  • instantly.get_lead_labels
    Get Lead Label by ID (Deprecated)
  • instantly.get_subsequence
    Get Subsequence
  • instantly.list_lead_lists
    List Lead Lists
+ 37 MORE

write

47

Create and change things. Allow, or ask the user first.

  • instantly.create_lead
    Create Lead
  • instantly.update_lead
    Update Lead
  • instantly.add_leads_bulk
    Add Leads in Bulk
  • instantly.create_api_key
    Create API Key
  • instantly.create_webhook
    Create Webhook
  • instantly.create_campaign
    Create Campaign
  • instantly.update_campaign
    Update Campaign
  • instantly.create_lead_list
    Create Lead List
  • instantly.update_lead_list
    Update Lead List
  • instantly.create_custom_tag
    Create Custom Tag
  • instantly.update_custom_tag
    Update Custom Tag
  • instantly.create_subsequence
    Create Subsequence
  • instantly.update_subsequence
    Update Subsequence
  • instantly.create_ai_enrichment
    Create AI Enrichment
  • instantly.update_workspace_current
    Update Current Workspace
  • instantly.create_inbox_placement_test
    Create Inbox Placement Test
+ 31 MORE

destructive

17

Delete, cancel or archive. Ask first, or deny outright.

  • instantly.delete_lead
    Delete Lead
  • instantly.delete_api_key
    Delete API Key
  • instantly.delete_webhook
    Delete Webhook
  • instantly.delete_campaign
    Delete Campaign
  • instantly.delete_lead_list
    Delete Lead List
  • instantly.delete_custom_tag
    Delete Custom Tag
  • instantly.delete_lead_label
    Delete Lead Label
  • instantly.delete_subsequence
    Delete Subsequence
  • instantly.delete_block_list_entry
    Delete Block List Entry
  • instantly.delete_whitelabel_domain
    Delete Whitelabel Domain
  • instantly.remove_lead_from_subsequence
    Remove Lead From Subsequence
  • instantly.merge_leads
    Merge Leads
  • instantly.get_block_list_entry
    Get Block List Entry
  • instantly.disable_account_warmup
    Disable Account Warmup
  • instantly.create_block_list_entry
    Create Block List Entry
  • instantly.list_block_list_entries
    List Block List Entries
+ 1 MORE
03 · HOW IT WORKS

Instantly in three steps.

  1. 01Your users connect InstantlyThey add their Instantly api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Lead” can wait for the user, and “delete Lead” can be denied outright.
  3. 03Any agent can actYour agent calls Instantly through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('instantly', {
  read: 'allow',
  write: 'ask',        // create_lead
  destructive: 'deny',  // delete_lead
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Instantly connects.

Users add their Instantly api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Instantly connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Instantly from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More marketing apps.

Meta Ads67 actionsActiveCampaign298 actionsActiveTrail159 actionsAdobe Marketing Agent12 actionsAdtraction22 actionsAdyntel8 actionsAhrefs40 actionsAirOps96 actions
ALL MARKETING APPS →
07 · FAQ

Instantly and Arc0, answered.

Q01

Can I use Instantly with Claude, ChatGPT or Cursor?

Yes. Connect Instantly to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Instantly actions you allow.

Q02

How do users connect Instantly?

Users add their Instantly api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Instantly actions can my agent take?

117 in total: 53 read, 47 write and 17 destructive, such as “create Lead”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Instantly?

Yes. Actions like “delete Lead” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Instantly too?

Yes. The same Instantly connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Instantly into your agent.

Your users connect Instantly once, under your brand. Your agent gets 117 actions behind your policies, with every call on the record.

Connect InstantlyBrowse all apps →

Free to build · MCP + REST · Audit log on every plan