Askell

Name: Askell
Author: Neschadin

by Neschadinversion 0.4.27i★ –iRuns on your computer

Registry nameio.github.Neschadin/askell-mcp

Install

Overview

Description from the maker (original English)

MCP server for the Askell payment and subscription API (Bun + stdio)

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 checksi1 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 on your computer
Transport: stdio
Category: Online shops & payments
You need to fill in: ASKELL_PRIVATE_API_KEY

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: ASKELL_PRIVATE_API_KEY, ASKELL_ENV

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

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

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

{
  "mcpServers": {
    "askell": {
      "command": "npx",
      "args": [
        "-y",
        "askell-mcp"
      ],
      "env": {
        "ASKELL_PRIVATE_API_KEY": "your-value",
        "ASKELL_ENV": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add askell --env ASKELL_PRIVATE_API_KEY=your-value --env ASKELL_ENV=your-value -- npx -y askell-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": {
    "askell": {
      "command": "npx",
      "args": [
        "-y",
        "askell-mcp"
      ],
      "env": {
        "ASKELL_PRIVATE_API_KEY": "your-value",
        "ASKELL_ENV": "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": {
    "askell": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "askell-mcp"
      ],
      "env": {
        "ASKELL_PRIVATE_API_KEY": "your-value",
        "ASKELL_ENV": "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 one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

Values you fill in

ASKELL_PRIVATE_API_KEY secret required env
Secret API key from the Askell dashboard
ASKELL_ENV env
production (default) or sandbox

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 Neschadin, 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Online shops & paymentsi

More stars than 0% of the other 1754 servers in this category
Published to the registry more recently than 83% of the other 1754 servers in this category
Basic checks equal to or better than 100% of the other 1754 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 Askell 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: ASKELL_PRIVATE_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.4.27) reached the registry 4 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spree Commerce: open-source B2B and marketplace ecommerce, Stripe MCP, MCP Cn Commerce

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

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Install

MCP Cn Commerce

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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.

askell-mcp

MCP server for the Askell payment and subscription API.

Connect it to Cursor, Claude Desktop, or any MCP client to discover Askell endpoints, inspect customers/contracts/billing, and call the API. Reads and writes are separate tools so clients can show their own approval UI on mutations.

Requirements

An Askell account and secret API key (from the Askell dashboard). The public key is optional — only temporary payment-method and checkout status endpoints use it
One of:
Bun ≥ 1.4.0 (for bunx), or
a prebuilt binary from Releases (no Bun needed)

Quick start

Prefer two server entries if you have both production and sandbox keys. Tool names are the same on both; the client distinguishes them by the server key (askell-prod vs askell-sandbox). Each instance's instructions include the environment it is talking to.

Put keys in gitignored dotenv files, not in JSON. Copy .env.example:

.env — production (ASKELL_ENV=production and that dashboard's keys)
.env.sandbox — sandbox (ASKELL_ENV=sandbox and that dashboard's keys)

Bun does not auto-load .env.sandbox. --no-env-file stops the sandbox process from also reading a production .env that happens to sit in the cwd.

Cursor

Project file: .cursor/mcp.json. mcp.json.example is this shape. ${workspaceFolder} is the directory that contains that mcp.json (the repo root when the file is .cursor/mcp.json). In ~/.cursor/mcp.json, use an absolute envFile path.

With Bun:

"mcpServers": { "askell-prod": { "command": "bunx", "args": ["--no-env-file", "x", "askell-mcp"], "envFile": "${workspaceFolder}/.env" }, "askell-sandbox": { "command": "bunx", "args": ["--no-env-file", "x", "askell-mcp"], "envFile": "${workspaceFolder}/.env.sandbox" } } }

With a binary (download askell-mcp- - from Releases, then chmod +x). Same envFile; the binary reads the environment Cursor injects:

"mcpServers": { "askell-prod": { "command": "/absolute/path/to/askell-mcp-linux-x64", "envFile": "${workspaceFolder}/.env" } } }

Reload the window after saving.

Claude Desktop

Config file:

Linux: ~/.config/Claude/claude_desktop_config.json
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

No envFile field. The desktop process cwd is not your repo, so a relative .env path does not resolve. With Bun, pass an absolute --env-file:

"mcpServers": { "askell-prod": { "command": "bunx", "args": [ "--no-env-file", "--env-file=/absolute/path/.env", "x", "askell-mcp" ] }, "askell-sandbox": { "command": "bunx", "args": [ "--no-env-file", "--env-file=/absolute/path/.env.sandbox", "x", "askell-mcp" ] } } }

A binary has no --env-file. Put the keys in env (plaintext in that JSON file):

"mcpServers": { "askell-prod": { "command": "/absolute/path/to/askell-mcp-linux-x64", "env": { "ASKELL_ENV": "production", "ASKELL_PRIVATE_API_KEY": "your_production_secret_api_key", "ASKELL_PUBLIC_API_KEY": "your_production_public_api_key_optional" } } } }

Quit Claude Desktop completely and reopen it. Saving the file is not enough.

Claude Code

Project .mcp.json expands ${VAR} from the environment of the process that launched claude. It does not load a dotenv file. The Bun --env-file args from the Desktop section work here as well; a relative path is fine when you start claude from the repo. ${ASKELL_PRIVATE_API_KEY} inside env only works when that variable is already exported in that environment. A .env file alone is not read.

Configuration

Variable	Required	Default	Description
`ASKELL_PRIVATE_API_KEY`	yes\*	—	Secret API key (_or_ `ASKELL_SECRET_API_KEY`)
`ASKELL_PUBLIC_API_KEY`	no	—	Public key for a few checkout/payment endpoints
`ASKELL_ENV`	no	`production`	`production` \	`sandbox` — selects the official API host
`ASKELL_API_BASE_URL`	no	—	Custom/local API base only. Do not set together with `ASKELL_ENV` unless it matches
`ASKELL_RESPONSE_MAX_BYTES`	no	`64000`	Max response size returned to the model
`ASKELL_MUTATION_GATE`	no	`auto`	`auto` / `elicit` / `off` — see below
`ASKELL_REQUIRE_MUTATION_APPROVAL`	no	—	Deprecated alias: `true`→`elicit`, `false`→`off`

ASKELL_ENV picks a stable host (same v1/v2 surface):

production — https://askell.is/api
sandbox — https://sandbox.askell.is/api (isolated tenant; keys from that dashboard)

Point a second MCP server entry at sandbox (ASKELL_ENV=sandbox) rather than switching env on one process. Keys do not work across hosts. Áskell Test Gateway is a payment acquirer (fake cards) on either host — not the same as the sandbox API. Official prose at docs.askell.is still documents Test Gateway and may omit the sandbox host.

ASKELL_MUTATION_GATE:

`auto` (default) — confirmation form only if _this request's_ _meta envelope declared form elicitation (MCP 2026-07-28). 2025-era clients (Cursor, most hosts) do not send that envelope, so the mutation runs and their own “allow this tool” UI is the gate.
`elicit` — always return an elicitation form. The SDK refuses the call if the client cannot fulfil it (2026 envelope / 2025 initialize via the legacy shim).
`off` — never ask (eval / trusted automation).

If both ASKELL_MUTATION_GATE and ASKELL_REQUIRE_MUTATION_APPROVAL are set, ASKELL_MUTATION_GATE wins.

What you can do

Tools

Tool	Description
`askell_list_operations`	Search bundled OpenAPI operations
`askell_describe_operation`	Params and body schema for one operation
`askell_call`	GET/HEAD any v1/v2 endpoint
`askell_mutate`	POST/PUT/PATCH/DELETE any v1/v2 endpoint
`askell_paginate_all`	Follow paginated list endpoints
`askell_customer_overview`	v1 customer + subscriptions
`askell_contract_overview`	v2 subscription contract + billing runs
`askell_billing_run_triage`	v2 billing run (+ optional contract)
`askell_list_webhooks`	List configured webhooks (`hmac_secret` redacted)

hmac_secret is the only field redacted in tool output. Customer-portal sign-in URLs and widget tokens (POST /v2/customer-portal-entries/, POST /v2/customer-portal-sessions/) are returned in full so the browser can use them. Do not put the widget token in a URL.

Resources

URI	Content
`askell://spec/v1`	OpenAPI v1
`askell://spec/v2`	OpenAPI v2
`askell://docs/webhook-events`	Webhook event reference

Docs: docs.askell.is · OpenAPI: v1 · v2

License

MIT

Contributing

See CONTRIBUTING.md for local development, tests, and releases.

Askell

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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 Online shops & paymentsi

Common questions

Alternatives

Spree Commerce: open-source B2B and marketplace ecommerce

Stripe MCP

MCP Cn Commerce

README from the maker

askell-mcp

Requirements

Quick start

Cursor

Claude Desktop

Claude Code

Configuration

What you can do

Tools

Resources

License

Contributing