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Heyy for AI agents

Heyy connects businesses to customers over WhatsApp, SMS, Messenger, and Instagram with automation built in. Teams use it to reach customers on the channels they already check daily. 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 HeyySee the 13 actions ↓
CommunicationAPI keyMCP + RESTheyy.co
AUDIT LOG · HEYYPOLICY: acme-support
09:41:07 · claude · u_8f2read
heyy.list_channels
List Channels✓ allowed · 212ms
09:41:08 · claude · u_8f2read
heyy.list_webhooks
List API Webhooks✓ allowed · 164ms
09:41:09 · claude · u_8f2write
heyy.create_label
Create Label✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
heyy.delete_label
Delete Label✕ blocked · policy: deny
EVERY HEYY CALL, ON THE RECORD
01 · USE CASES

What agents do in Heyy.

01

List message templates

List approved message templates to pick the right one for a customer notification.

02

Add a label to a contact

Tag a contact with a label so they are grouped correctly for a follow-up campaign.

03

Delete a webhook with confirmation

Delete a configured webhook only after an admin confirms it is no longer used.

02 · ACTIONS

13 Heyy actions, graded by risk.

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

read

5

Look things up. Allowed by default.

  • heyy.list_channels
    List Channels
  • heyy.list_webhooks
    List API Webhooks
  • heyy.list_attributes
    List Attributes
  • heyy.list_automations
    List Automations
  • heyy.list_message_templates
    List Message Templates

write

5

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

  • heyy.create_label
    Create Label
  • heyy.create_contact
    Create Contact
  • heyy.create_webhook
    Create Webhook
  • heyy.update_webhook
    Update Webhook
  • heyy.create_attribute
    Create Contact Attribute

destructive

3

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

  • heyy.delete_label
    Delete Label
  • heyy.delete_webhook
    Delete Webhook
  • heyy.delete_attribute
    Delete Attribute
03 · HOW IT WORKS

Heyy in three steps.

  1. 01Your users connect HeyyThey add their Heyy api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Label” can wait for the user, and “delete Label” can be denied outright.
  3. 03Any agent can actYour agent calls Heyy 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('heyy', {
  read: 'allow',
  write: 'ask',        // create_label
  destructive: 'deny',  // delete_label
})

# 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 Heyy connects.

Users add their Heyy 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 Heyy 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 Heyy from any agent.

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

More communication apps.

Slack168 actionsMicrosoft Teams174 actionsDiscord28 actionsSlackbot101 actions2chat5 actionsAimTell15 actionsAndroid Texter11 actionsDialpad192 actions
ALL COMMUNICATION APPS →
07 · FAQ

Heyy and Arc0, answered.

Q01

Can I use Heyy with Claude, ChatGPT or Cursor?

Yes. Connect Heyy 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 Heyy actions you allow.

Q02

How do users connect Heyy?

Users add their Heyy 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 Heyy actions can my agent take?

13 in total: 5 read, 5 write and 3 destructive, such as “create Label”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Heyy?

Yes. Actions like “delete Label” 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 Heyy too?

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

Get started

Plug Heyy into your agent.

Your users connect Heyy once, under your brand. Your agent gets 13 actions behind your policies, with every call on the record.

Connect HeyyBrowse all apps →

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