Integrations / n8n

n8n: let an AI agent send SMS or place calls

n8n reaches Hail two ways: an HTTP Request tool on the AI Agent node, or the MCP Client node pointed at Hail's MCP server. Both drive the same account.

01Option A: HTTP Request tool

Add an HTTP Request tool to your AI Agent node with these settings. The agent fills to and body from the conversation.

Method: POST
URL: https://api.hail.so/sms
Authentication: Generic > Header Auth
  Name: Authorization
  Value: Bearer hl_live_9fa2...
Body (JSON):
{
  "to": "{to}",
  "body": "{body}",
  "recipient_consent": true
}

02Option B: MCP Client node

Point the MCP Client Tool node at Hail's MCP server and approve the OAuth screen once. send_sms, send_email, and place_call appear as tools the agent can use.

MCP endpoint: https://mcp.hail.so
Auth: OAuth (one-click approval)

03Receive inbound

Start a workflow from a plain n8n Webhook node and register its URL with Hail, so inbound SMS and email trigger flows.

POST https://api.hail.so/webhooks
{
  "target_url": "https://your-n8n.example/webhook/hail",
  "event_types": ["sms.received", "email.received"]
}

Questions

Which option should I pick?

MCP is fastest and needs no key handling in n8n. Pick the HTTP tool when you want exact control over the request the agent can make.

Can non-agent workflows use the same account?

Yes. Any n8n workflow can call the REST API directly with the same key and the same balance.

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