jPOS MCP Server

The first open-source MCP server for jPOS and ISO 8583. Claude validating a real ISO 8583 financial transaction request using deterministic tools. No guessing - every answer comes from verified data. Its 6 documented tools cluster into read & search, decode, generate, validate. It runs locally over stdio via the published package.

People connecting finance tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-04-12 · ★ 4 · #212 OF 283 MAINTAINED FINANCE · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install jPOS MCP Server

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add mohisyed-jpos-mcp -- uvx jpos-mcp-server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mohisyed-jpos-mcp": {
      "command": "uvx",
      "args": [
        "jpos-mcp-server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package jpos-mcp-server - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.mohisyed is GitHub-verified and matches the repo owner

03 · What jPOS MCP Server can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 6 documented tools across read & search, decode, generate, including lookup_field, decode_mti, generate_packager, validate_descriptor.

Capability map

Tools grouped from the project's README - what jPOS MCP Server lets an agent do.

read & search

2 tools - e.g. iso; docs

lookup_field · search_jpos

Decode

1 tool - e.g. iso

decode_mti

Generate

1 tool - e.g. jpos

generate_packager

Validate

1 tool - e.g. jpos

validate_descriptor

Build

1 tool - e.g. msg

build_message

Latest releases

v0.1.0 · 2026-04-12

jPOS MCP Server v0.1.0 - Initial Release · The first open-source MCP server for jPOS and ISO 8583. Give AI agents (Claude, Cursor, VS Code Copilot) deterministic, verified access to payment protocol expertise. · No…

04 · Who maintains jPOS MCP Server

jPOS MCP Server is maintained by mohisyed. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/mohisyed/jpos-mcp
website: https://github.com/mohisyed/JPOS-MCP
category: finance - ranked #212 of 283 actively-maintained finance servers as of 2026-08-25.
registry: io.github.mohisyed/jpos-mcp-server (active, first published 2026-04-12)
packages: pypi:jpos-mcp-server

06 · jPOS MCP Server FAQ

Is jPOS MCP Server still maintained?

Yes - as of 2026-08-25, its last commit was 2026-04-12. We re-verify nightly.

What can jPOS MCP Server do?

An agent gets 6 documented tools across read & search, decode, generate, including lookup_field, decode_mti, generate_packager, validate_descriptor.

How do I install jPOS MCP Server?

Run `uvx jpos-mcp-server`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does jPOS MCP Server run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to jPOS MCP Server

Alternatives to jPOS MCP Server

Maintained finance servers if jPOS MCP Server isn't the fit.

Pairs well with

Servers that cover what jPOS MCP Server doesn't - only shown when the pairing reason fits the companion.

More finance MCP servers · Mpp32 MCP Server · Xendit MCP · aikstockdata - Korean Stock Data · Yahoo Finance (narumiruna) · Mftool MCP

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