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PopNx MCPMCP servers for people who use AI · explained in plain words

klanex

by chrassyversion 0.1.0i★ –iComputer or cloud
Registry nameio.github.chrassy/klanex

Install

Overview

Description from the maker (original English)

Reliable async execution for agent tool calls: schema gating, retries, idempotency, audit trail.

PopNx MCP’s three pillars

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

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: Computer or cloud
  • Transport: stdio, Streamable HTTP
  • Category: Other
  • You need to fill in: KLANEX_API_KEY, X-API-Key

Install

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

Before you install

  • Basic checks: 1 of 1 passed
  • Runs on the maker’s server: what you ask it goes through their server.
  • You fill in yourself: KLANEX_API_KEY, X-API-Key

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

  • Runs in the cloudNothing to install; it connects over the internet
  • npmNode.js installed (for the npx command)

Which app do you use?

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

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "klanex": {
      "command": "npx",
      "args": [
        "-y",
        "klanex-mcp"
      ],
      "env": {
        "KLANEX_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http klanex https://api.klanexai.com/mcp --header 'X-API-Key: your-value'

Or run it on your computer

claude mcp add klanex --env KLANEX_API_KEY=your-value -- npx -y klanex-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "klanex": {
      "url": "https://api.klanexai.com/mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "klanex": {
      "command": "npx",
      "args": [
        "-y",
        "klanex-mcp"
      ],
      "env": {
        "KLANEX_API_KEY": "your-value"
      }
    }
  }
}

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": {
    "klanex": {
      "type": "http",
      "url": "https://api.klanexai.com/mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "klanex": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "klanex-mcp"
      ],
      "env": {
        "KLANEX_API_KEY": "your-value"
      }
    }
  }
}

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.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

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

Values you fill in

  • KLANEX_API_KEY secret required env
    klanex API key; klx_test_... keys route to the sandbox automatically
  • X-API-Key secret required HTTP header
    klanex API key (klx_live_... for production; free klx_test_... sandbox keys work at https://api.sandbox.klanexai.com/mcp)

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 7, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account chrassy, which owns the repo

  • … 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 32568 servers in this category
  • Published to the registry more recently than 19% of the other 32568 servers in this category
  • Basic checks equal to or better than 100% of the other 32568 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 klanex safe?

It passed 1 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?

You need to fill in: KLANEX_API_KEY, X-API-Key

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 4 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, FlyDocs

Alternatives

Servers in the same category from other makers, sorted by stars.

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

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago
Install

Remote Desktop Commander

by desktop-commander

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

Runs in the cloud★ 211Updated yesterday
Install

FlyDocs

by flydocs.ai

Spec-driven development workflow: your agent works issues, sessions and the status lifecycle.

Runs on your computerUpdated today
Install

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.

klanex MCP server

Reliable execution for agent tool calls, as an MCP server.

klanex is an async execution layer between an agent's tool-use intents and real third-party APIs: it schema-gates hallucinated payloads before anything runs, absorbs rate limits and outages with retries/backoff/circuit breakers, encrypts credentials, keeps an audit trail, and reports back via signed webhooks. With this MCP server, an agent submits a call once — klanex makes sure it lands.

Failures come back written *for the model*: every error carries an llm_hint telling the agent exactly what to fix (or that klanex is already handling it), so agents self-correct instead of guessing.

Connect (hosted, recommended)

klanex's MCP server is hosted — no install needed if your client supports HTTP transports:

EndpointEnvironmentKeys
https://api.klanexai.com/mcpproductionklx_live_…
https://api.sandbox.klanexai.com/mcpsandbox (free to try)klx_test_…

Get an API key at klanexai.com — sandbox keys are free.

Claude Code

claude mcp add --transport http klanex https://api.klanexai.com/mcp \

--header "X-API-Key: klx_live_..."

Cursor / Windsurf / VS Code (mcp.json)

{

"mcpServers": { "klanex": { "url": "https://api.klanexai.com/mcp", "headers": { "X-API-Key": "klx_live_..." } } } }

Authorization: Bearer klx_... works too, for clients that can only set that header.

Connect (stdio shim)

For clients that only speak stdio (e.g. Claude Desktop), this package proxies stdio to the hosted endpoint:

{

"mcpServers": { "klanex": { "command": "npx", "args": ["-y", "klanex-mcp"], "env": { "KLANEX_API_KEY": "klx_live_..." } } } }

The shim routes by key prefix — klx_test_… keys go to the sandbox automatically. Set KLANEX_MCP_URL to override.

Tools

ToolWhat it does
executeSubmit an HTTP call for reliable async execution: optional JSON Schema gate, retries/backoff/circuit breakers, idempotency keys, human approval gates, encrypted credentials. wait_seconds blocks up to 55s for the terminal result.
get_executionCurrent status, attempts, target response, or classified error for an execution.
list_executionsThe account's executions, filterable by status/time, paginated.
replay_executionRe-run a terminal execution byte-exact — outage recovery without re-prompting the LLM.
get_usagePlan and current-month usage/quota.
list_connectionsStored credential connections (token vault) to reference via connection_id — so secrets never pass through model context.

Why this beats calling APIs directly

  • Hallucinated payloads are rejected before they execute — pass payload_schema and mismatches return synchronously with a correction hint.
  • Transient failures are not the agent's problem — 429s, timeouts, and 5xxs are retried with backoff behind a circuit breaker; the agent does nothing.
  • A network blip can never double-execute a refund — idempotency_key makes submits safe to retry.
  • Destructive actions can wait for a human — requires_approval pauses execution for an approve/reject decision (API, dashboard, or Slack buttons).
  • Credentials stay out of model context — store them once as a connection; klanex injects them at execution time.

Full API docs: api.klanexai.com/docs

License

MIT

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