Connect ChatGPT to Hail over MCP
ChatGPT supports MCP through Plugins. Add Hail one time on the web. Then every chat on web and desktop can use the Hail tools.
Works in ChatGPT Web, ChatGPT Desktop, and Custom GPTs.
Setup
1
Add Hail to ChatGPT
Add the Hail MCP server with the snippet below. Open Plugins, turn on Developer mode, click +, then click New Plugin.
New Plugin, Server URL, Authentication: OAuth
https://mcp.hail.so
2
Approve access and send a test prompt
Reload the client. On first use, the client opens a browser tab. Sign in to Hail or create an account. Click Allow. Then send the prompt below. The setup works if Hail places the call or sends the message.
"Send an SMS to +1-415-555-0123 saying tomorrow's meeting moved to 3pm."Notes
Earlier namesPlugins had the names Apps and Connectors before.
Developer modeEnable it on the Plugins page. The + button then offers New Plugin.
CreateName: Hail. Connection: Server URL, paste the URL. Authentication: OAuth. Confirm the trust prompt. Click Create.
PlansPlus/Pro: read tools only. Full tools: Business, Enterprise, Edu (beta, admin-enabled). Free: none.
WhereCreate on the web only. Enable per chat from the + / tools menu.
WorkspacesNew plugins start as Drafts. An admin publishes them.
PrivacyHail does not receive chat history. Hail receives only tool arguments.
ManageRevoke or manage this app at hail.so/console/apps.
Self-hostSet HAIL_API_KEY as the bearer. See docs/mcp.
Place your first call from ChatGPT
Self-host with your own carrier, or use a managed number from Hail.
