Overview

ErzyCall publishes an MCP server. MCP (Model Context Protocol) is an open standard that lets an AI assistant use an outside service — a universal adapter between your AI and your tools.

Once connected you can type "call Maria and confirm tomorrow's 3pm appointment" or "how did yesterday's calls go?" and the assistant does it in your ErzyCall account, using your phone numbers, contacts, and call scripts.

Connection details

What you get

• You stay in control — the assistant asks for confirmation before it places a real call or sends a message.
• Scoped to one organization — during sign-in you pick which ErzyCall organization to connect. Only that org's data is reachable.
• Revocable anytime — remove the connector in your AI tool to disconnect it. Tokens also expire, and a password change or organization change ends the grant.

Before you begin

• An ErzyCall account you can sign into in a browser, with at least one organization.
• At least one phone number assigned to that organization (otherwise calls have nothing to dial from).
• Admin rights in your AI tool if you're on a Team / Business / Enterprise plan — in most, only an owner or admin can add a custom connector.

Set up your tool

• Chat assistants — ChatGPT, Claude
• Coding tools — Claude Code, Cursor, Hermes, VS Code, Windsurf/Devin, Zed
• Automation platforms — n8n, Make.com, Zapier
• Tools & permissions — what the assistant can do once connected
• Troubleshooting

If your tool isn't listed, look for a setting called Custom connector, MCP server, Remote MCP, or Add server, and paste the values from the table above.

Technical details (for IT / security review)

• Protected-resource metadata: https://app.erzycall.com/api/mcp/.well-known/oauth-protected-resource
• Authorization server metadata: https://app.erzycall.com/api/mcp/.well-known/oauth-authorization-server
• Authorization endpoint: https://app.erzycall.com/oauth/authorize
• Token endpoint: https://app.erzycall.com/oauth/token
• Dynamic client registration (RFC 7591): https://app.erzycall.com/api/mcp/oauth/register
• Grant types: authorization_code, refresh_token · PKCE: S256 (required)
• Bearer token in the Authorization header. GET on the endpoint returns 405 — POST-only Streamable HTTP.
• Scopes: calls:read calls:write contacts:read contacts:write contact_groups:read cases:read cases:write assistants:read assistants:write phone_numbers:read whatsapp:read whatsapp:write usage:read