A2apay

Name: A2apay
Author: groundhogday2011-byte

by groundhogday2011-byteversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.groundhogday2011-byte/a2apay

Install

Overview

Description from the maker (original English)

Pay-per-call AI query and versioned task memory for agents. No account, no API key, via x402.

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: Docs, sheets & office work
You need to fill in: A2APAY_PRIVATE_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: A2APAY_PRIVATE_KEY

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

You need

PyPIPython’s uv installed (for the uvx 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": {
    "a2apay": {
      "command": "uvx",
      "args": [
        "a2apay-io"
      ],
      "env": {
        "A2APAY_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add a2apay --env A2APAY_PRIVATE_KEY=your-value -- uvx a2apay-io

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": {
    "a2apay": {
      "command": "uvx",
      "args": [
        "a2apay-io"
      ],
      "env": {
        "A2APAY_PRIVATE_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": {
    "a2apay": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "a2apay-io"
      ],
      "env": {
        "A2APAY_PRIVATE_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 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

A2APAY_PRIVATE_KEY secret env
Base mainnet wallet private key, only needed once the free tier (5 calls/day) is used up. Never required for free-tier-only usage.

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 groundhogday2011-byte, 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 Docs, sheets & office worki

More stars than 0% of the other 2191 servers in this category
Published to the registry more recently than 50% of the other 2191 servers in this category
Basic checks equal to or better than 100% of the other 2191 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 A2apay 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: A2APAY_PRIVATE_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 (0.1.0) reached the registry 30 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

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

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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.

a2apay

Python client for a2apay.io — pay-per-call AI answers and persistent memory for autonomous agents. No account, no API key.

pip install a2apay-io          # free-tier only

pip install "a2apay-io[paid]" # adds real payment support (eth-account)

(The PyPI distribution is named a2apay-io — an unrelated package already holds the bare a2apay name. The importable module is still a2apay.)

Quick start (free tier, zero setup)

Every call tries the free tier first automatically — 5 requests/day per caller, no wallet needed:

from a2apay import Agent

agent = Agent() answer = agent.ask("What's 7 times 8?") print(answer)

agent.remember("last_task", "processed invoice #4471", tags=["billing"])

With real payment (once the free tier is used up)

from a2apay import Agent

agent = Agent(private_key="0x...") # or set A2APAY_PRIVATE_KEY answer = agent.ask("What's 7 times 8?")

The wallet needs a small USDC balance on Base mainnet ($0.028/call). The private key is used only to sign a payment authorization locally — it is never sent anywhere.

Checkpoint / resume (task memory)

Write versioned, task-scoped state and read it back later — even from a different process. Each checkpoint() to the same key adds a new version rather than overwriting, and resume() always returns the latest.

from a2apay import Agent

agent = Agent(private_key="0x...") agent.checkpoint("invoice-batch-7", key="status", value="processed rows 1-400")

...process dies, or a second process picks up later...

agent2 = Agent(private_key="0x...") # same wallet records = agent2.resume("invoice-batch-7") print(records0) # "processed rows 1-400"

resume() always requires payment ($0.014/call) — there's no free tier for reads yet, so it needs a configured wallet even for your first call. checkpoint() follows the same free-tier-then-paid behavior as remember().

What this honestly does and doesn't do

ask() returns a real AI-generated answer.
remember() stores a flat key/value record with optional tags — this is simple text storage, not a document database. Values are stored as text.
Falls back to a real payment only when the free tier returns a 402; if no private_key is configured at that point, it raises a clear A2ApayError rather than failing silently.
Payment signing uses eth-account (maintained by the Ethereum Foundation ecosystem), implementing the real x402 "exact" EVM scheme per the x402 protocol spec.

MCP server

An MCP server (mcp_server.py) exposes ask and remember as MCP tools for any MCP-aware agent or framework (Claude Desktop, etc.):

pip install "a2apay-io[mcp]"

python mcp_server.py

Add to an MCP client config:

"mcpServers": { "a2apay": { "command": "python", "args": ["/absolute/path/to/mcp_server.py"], "env": {"A2APAY_PRIVATE_KEY": "0x..."} } } }

Honest scope note: remember is write-only — there's no memory read-back tool because the live API doesn't have a read-back route yet.

Full API reference

See a2apay.io/openapi.yaml for the underlying HTTP API this wraps.

A2apay

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 Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

a2apay

Quick start (free tier, zero setup)

With real payment (once the free tier is used up)

Checkpoint / resume (task memory)

...process dies, or a second process picks up later...

What this honestly does and doesn't do

MCP server

Full API reference