Plain Mcp

io.github.mrfentmenv1.0.0Updated Oct 1, 2026

Query the Plain GraphQL API: customers, threads, thread details.

VerifiedSTDIODesktop onlyBusiness & Commerce

Overview

AI-generated overview

Lets an assistant query the Plain GraphQL API for customers, threads, and thread details.

What it does
This local MCP server exposes the Plain GraphQL API to an assistant, covering customers, threads, and thread details. It runs as a stdio process on the user's machine, so the assistant can look up support-related records through the tools it provides.
When to use it
Worth adding when an assistant needs to read Plain customer and thread data during support or account investigations, and the user already works with Plain.
Requirements
A local runtime able to run the npm package plain-mcp over stdio, plus whatever Plain API credentials the server expects. The manifest declares no authentication, environment variables, or headers, so check the package documentation for the actual credential setup.
Before you install
The manifest declares no authentication, environment variables, or headers, so verify how the server obtains Plain API access before installing. Queries reach Plain's API, sending customer and thread data to that third party. Confirm whether the tools only read or can also change records.

Installation

In SourceWeft

  1. Open Plain Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

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Tools

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Version history

1
  1. v1.0.0LatestOct 1, 2026