Context7
Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.
Computer or cloud
Port 402 Memory
Overview
Description from the maker (original English)
Memory, inbox and alarm clock for AI agents, paid per call in USDC on Base (x402). No API key.
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
- UsageiVery new★ –
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: Search & AI memory
- You need to fill in: PORT402_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:
PORT402_PRIVATE_KEY,PORT402_MAX_USD_PER_CALL
Values marked secret are keys to your account. Never share them or paste them into a chat.
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Download the maker’s .mcpb file
The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.
Run this in your terminal
Fill in the empty values before running it.
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.
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
- Private key of a dedicated Base wallet holding a few USDC. It pays each call and is your private memory namespace.
PORT402_MAX_USD_PER_CALLenvSpending cap per call in USD (default 0.01).
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 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Tifdt, 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 Search & AI memoryi
- More stars than 0% of the other 5684 servers in this category
- Published to the registry more recently than 85% of the other 5684 servers in this category
- Basic checks equal to or better than 100% of the other 5684 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 Port 402 Memory 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: PORT402_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 (1.2.0) reached the registry 7 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need MCPB on your computer.
What can I use instead?
In the same category: Context7, Codebase Memory, Exa
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Codebase Memory
Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
Runs on your computer
Exa
Connect AI agents to Exa for web search, content fetching, and multi-step research.
Runs in the cloud✓ exa.ai
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.
Port 402 Memory — MCP server
A home for AI agents: memory that survives sessions, an inbox others can write to while you're away, and an alarm clock that wakes you up later. No account, no API key: each call is paid in USDC on Base via x402, and the paying wallet is your private namespace.
| Tool | Price |
|---|---|
memory_set (key, value) | $0.002 |
memory_get (key) — returns updatedAt too | $0.001 |
memory_list | $0.001 |
memory_delete (key) | $0.001 |
memory_export — signed (sha256 + Ed25519) | $0.002 |
inbox_get_url — secret URL anyone can POST to for free | $0.002 |
inbox_read (ack, limit) | $0.001 |
reminder_schedule (inSeconds or at, message, webhook?) | $0.005 |
reminder_list | $0.001 |
reminder_cancel (id) | $0.001 |
Typical loop: schedule a reminder, stop; when it fires (webhook or inbox), read your memory and carry on.
Privacy: values are stored unencrypted on the operator's server; encrypt sensitive values client-side. Key rotation (POST /v1/migrate), retention and shutdown notice: see the service docs.
$1 of USDC ≈ 500 writes or 1,000 reads. Hard cap per call: $0.01 by default (PORT402_MAX_USD_PER_CALL).
Install
Claude Code:
claude mcp add port402-memory -e PORT402_PRIVATE_KEY=0xYOUR_KEY -- npx -y github:Tifdt/port402-memory-mcpClaude Desktop / Cursor (mcpServers):
{ "port402-memory": { "command": "npx", "args": ["-y", "github:Tifdt/port402-memory-mcp"], "env": { "PORT402_PRIVATE_KEY": "0xYOUR_KEY" } } }Claude Desktop one-click: download port402-memory.mcpb from the latest release and open it.
Use a dedicated wallet with only a few dollars of USDC on Base.
HTTP API (without MCP)
https://port-402-production.up.railway.app — catalog at /pricing.json, /openapi.json, /llms.txt, terms at /terms.
Operated by Faloria — Florian Folio EI (France).
- MCP Registry name:
mcp-name: io.github.Tifdt/port402-memory