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IBM AS400 ISeries MCP Server

@abstracta

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基本情報

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その他

トランスポート

stdio

作者

abstracta

投稿者

Matias Fornara

IBM AS400 ISeries MCP Server について

This project implements a customizable MCP server to execute RTE protocol.

#as400#iseries#rte#tn3270#tn5250#vt420#abstracta

IBM AS400 ISeries MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "executeRteTransaction": {
      "command": "{java_path}",
      "args": [
        "-jar",
        "-Dspring.ai.mcp.server.stdio=true",
        "{jar_path}"
      ]
    }
  }
}

IBM AS400 ISeries MCP Server のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。

概要

What is IBM AS400 ISeries MCP Server?

It is an MCP (Model Context Protocol) server that executes RTE (Remote Terminal Emulation) protocol transactions on IBM AS/400 iSeries systems. It uses customizable YAML-based flows to define connection parameters and interaction steps, and it supports multiple terminal protocols (TN5250, TN3270, VT420). The server is intended for developers who need to automate terminal interactions with legacy IBM midrange systems.

How to use IBM AS400 ISeries MCP Server?

You need Java 21+. Compile the project with ./mvnw clean package. Then run the server in SSE mode with java -jar target/rte-mcp-server-0.0.1-SNAPSHOT.jar or in STDIO mode by adding -Dspring.ai.mcp.server.stdio=true. Configure connection parameters and RTE flow steps in a YAML file (e.g., flow.yaml). The YAML defines server, port, protocol, terminalType, sslType, and a list of steps with actions (label/input pairs) and an attentionKey.

Key features of IBM AS400 ISeries MCP Server

  • Customizable YAML-based RTE flow definitions.
  • Supports TN5250, TN3270, and VT420 terminal protocols.
  • Multiple terminal types (e.g., IBM-3477-FC, IBM-3278-M2) per protocol.
  • SSL options: None, TLS, SSLv3.
  • Extensible via RteUtils class and @Tool/@Service annotations.
  • Supports a wide range of attention keys (ENTER, function keys, PA keys, etc.).
  • Two transport modes: SSE (Server‑Sent Events) and STDIO.

Use cases of IBM AS400 ISeries MCP Server

  • Automating login sequences on IBM iSeries systems.
  • Executing repetitive transaction flows (e.g., data entry, queries).
  • Testing terminal interactions by replaying YAML‑defined steps.
  • Integrating legacy 5250/3270 applications into modern MCP workflows.

よくある質問

1

What dependencies does the server require?

The server requires **Java 21+** and a Maven build system (`./mvnw clean package`). No other runtime dependencies are mentioned.

2

How do I configure the RTE flow?

Define a YAML file with a `config` section (server, port, protocol, terminalType, sslType) and a `steps` section. Each step contains a list of `actions` (label/input pairs) and an `attentionKey` (e.g., ENTER, F1). Place the file in the classpath (e.g., `/flow.yaml`).

3

Which terminal protocols and types are supported?

Supported protocols: **TN5250**, **TN3270**, and **VT420**. Terminal types vary per protocol; for example, TN5250 supports `IBM-3477-FC: 27x132` and `IBM-3179-2: 24x80`. See the README table for full list.

4

Can I run the server in STDIO mode?

Yes. Add `-Dspring.ai.mcp.server.stdio=true` to the Java command. Otherwise, the server runs in SSE mode by default.

5

How can I add custom MCP tools?

Extend the server by creating a `@Service` class that implements `RteTool`. Use `RteUtils.connect()` and `RteUtils.executeSteps()` inside a `@Tool`‑annotated method. Load your YAML flow inside the method.

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