Plain

About

Plain is an MCP connector that gives the Sazabi agent tools to search and manage support threads, customers, and tenants. Plain's MCP server authenticates via OAuth with dynamic client registration. Once connected, agents can search support threads, retrieve customer information, and browse tenant data. Write operations are restricted by default.

What the agent can do:

• Search and browse support threads by customer or topic
• Retrieve customer profiles and contact details
• Access tenant data and account metadata
• Review thread timelines and support history

Prerequisites

• An active Plain workspace
• Permission to authorize third-party OAuth applications in Plain

Set up in the dashboard

Configure connectors in the dashboard under Settings > MCP connectors.

Set up with the CLI

You can also connect Plain with the Sazabi CLI (installed and authenticated — see sazabi mcp-connectors reference).

Plain authenticates over OAuth, so the CLI opens a browser to complete authorization:

sazabi mcp-connectors connect plain

Add --read-only to restrict the connector to read-only tools, or --project-id <project> to target a specific project. In --json mode the command prints an authorization URL to open, then polls until the connection completes. Confirm the result with sazabi mcp-connectors list.

Verify

Open the connector's connection page under Settings > MCP connectors and confirm Sazabi lists the tools it discovered. Then, in a thread, ask the agent to use one of those tools and confirm it runs. If no tools appear, confirm the connection is authorized (OAuth) or the key/header is correct (token auth).

Troubleshooting

No tools discovered — Disconnect and reconnect from Settings > MCP connectors to restart the OAuth flow.

Connection shows needs attention — The authorization or key may have expired or been revoked; reconnect from Settings > MCP connectors.

Further reading