JPYC Agent MCP

Name: JPYC Agent MCP
Author: yourbright-jp

by yourbright-jpversion 0.2.0i★ –iRuns in the cloud

Registry namecom.jpyc-info/jpyc-agent-mcp

Install

Overview

Description from the maker (original English)

OAuth-protected JPYC wallet, transfer, and contract workflows on Polygon.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi0 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 0 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://jpyc-info.com/api/jpyc-agent-mcp

Run this in your terminal

claude mcp add --transport http jpyc-agent https://jpyc-info.com/api/jpyc-agent-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "jpyc-agent": {
      "url": "https://jpyc-info.com/api/jpyc-agent-mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "jpyc-agent": {
      "type": "http",
      "url": "https://jpyc-info.com/api/jpyc-agent-mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://jpyc-info.com/api/jpyc-agent-mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

! Caution
Maker matches the repo
The publisher (jpyc-info.com) is not the repo owner (yourbright-jp); someone else may have listed it
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 18379 servers in this category
Published to the registry more recently than 4% of the other 18379 servers in this category
Basic checks equal to or better than 23% of the other 18379 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is JPYC Agent MCP safe?

It passed 0 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 7 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, NexusWindows

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs on your computer★ 440MITUpdated 14 months ago

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Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated 2 days ago

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NexusWindows

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Windows computer use in the background: desktop apps driven without your mouse or keyboard.

Runs on your computerUpdated today

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

JPYC Agent MCP

JPYC Agent MCP can be used both as a public MCP endpoint and as a Codex plugin bundle. This repository now uses the repository root as the plugin root so Codex can discover it directly.

What It Supports

Polygon agent wallet creation and lookup
Wallet balance inspection
JPYC transfer quote and execution flows
Contract read calls
Contract write quote and execution flows
Transfer and contract call status tracking

Plugin Layout

Codex should discover the plugin from the repository root via the files below:

.codex-plugin/plugin.json
.mcp.json
skills/jpyc-agent-mcp/SKILL.md
skills/jpyc-agent-mcp/agents/openai.yaml
config/default.json

Public Endpoint

MCP endpoint: https://jpyc-info.com/api/jpyc-agent-mcp
OAuth issuer: https://jpyc-info.com/api/jpyc-agent-oauth
Resource metadata: https://jpyc-info.com/.well-known/oauth-protected-resource
Authorization server metadata: https://jpyc-info.com/.well-known/oauth-authorization-server
OpenID configuration: https://jpyc-info.com/.well-known/openid-configuration
Human sign-in page: https://jpyc-info.com/mcp/connect
MCP Registry auth file: https://jpyc-info.com/.well-known/mcp-registry-auth

The endpoint is OAuth-protected. Users must log in and grant consent before private wallet operations can run. If you open the MCP endpoint directly in a browser, it redirects to https://jpyc-info.com/mcp/connect. If an MCP client receives 401 unauthorized, it should follow WWW-Authenticate and the resource metadata above to discover the OAuth flow. If ChatGPT/Codex does not surface a full authorization URL automatically, open https://jpyc-info.com/mcp/connect in the browser as the canonical human fallback. Low-level manual auth with /api/jpyc-agent-oauth/start remains available for debugging, but it is not the primary documented path. Clients using the low-level flow must keep the returned auth_session_secret private and present it when polling /api/jpyc-agent-oauth/auth-session.

For the complete OAuth contract and exact URLs, see docs/auth.md and config/oauth.json.

Claude Code

Claude Code does not natively support streamable-http MCP servers. Use mcp-remote to bridge streamable-http + OAuth to stdio.

Quick Start

Add the following to your project .mcp.json or ~/.claude/settings.json:

"mcpServers": { "jpyc-agent-mcp": { "command": "npx", "args": [ "mcp-remote", "https://jpyc-info.com/api/jpyc-agent-mcp" ] } } }

On first connection, mcp-remote opens a browser for OAuth consent. After authentication, all tools are available immediately.

Client Token Persistence

This repository defines the OAuth-protected MCP endpoint and the plugin metadata needed for Codex discovery. It does not implement client-side credential storage on behalf of Codex, ChatGPT, or any other MCP client.

Expected client behavior:

Start the OAuth flow against the JPYC Agent OAuth issuer
Receive the issued bearer token or equivalent session credential
Persist that credential in the client's local secure storage
Reuse it on subsequent MCP calls to https://jpyc-info.com/api/jpyc-agent-mcp
Verify the recovered session with auth_status

If a client can complete browser login but cannot persist and reuse the issued credential locally, the MCP integration is incomplete from the user's point of view. In that case, the fix belongs in the MCP client implementation rather than this repository's server-side OAuth protocol.

For local operator workflows, this repository includes helpers that persist the issued refresh token with DPAPI and reuse it across future sessions:

docs/local-token-cache.md
scripts/jpyc_oauth_cache.py (Python, Windows)
scripts/jpyc_oauth_cache.ps1 (PowerShell, Windows)

MCP Registry

This repository includes server.json for publishing the remote server to the public MCP Registry using the domain-based namespace com.jpyc-info/jpyc-agent-mcp.

For HTTP-based domain verification, host the exact text value v=MCPv1; k=...; p=... at https://jpyc-info.com/.well-known/mcp-registry-auth. In the jpyc-info deployment, that endpoint is served from the MCP_REGISTRY_AUTH environment variable.

Main Tools

auth_status
list_agent_wallets
get_agent_wallet
create_agent_wallet
get_agent_wallet_balance
quote_transfer
transfer_jpyc
list_transactions
get_transfer_status
read_contract
quote_contract_write
execute_contract_write
list_contract_call_history
get_contract_call_status

Detailed request and response examples are in docs/tools.md.

Recommended Flow

Check auth_status
Inspect wallets with list_agent_wallets
Create a wallet only if needed with create_agent_wallet
Check balances before transfers
Use quote-first execution for transfers and contract writes

Transfer flow:

quote_transfer
transfer_jpyc

Contract write flow:

quote_contract_write
execute_contract_write

Notes

This repo does not include secrets.
This repo does not include private keys or signer material.
The bundled skill is intended to keep Codex inside the JPYC Agent MCP tool surface.
For more details, see docs/auth.md, config/oauth.json, and docs/openai-and-mcp.md.

JPYC Agent MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

NexusWindows

README from the maker

JPYC Agent MCP

What It Supports

Plugin Layout

Public Endpoint

Claude Code

Quick Start

Client Token Persistence

MCP Registry

Main Tools

Recommended Flow

Notes