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Port 402 Memory

Official registry AI and agents

Persistent memory for AI agents, paid per call in USDC on Base (x402). No account, no API key.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

MCPB package https://github.com/Tifdt/port402-memory-mcp/releases/download/v1.0.0/port402-memory.mcpb

Environment variables

  • PORT402_PRIVATE_KEY required secret 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_CALL Spending cap per call in USD (default 0.01).

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Port 402 Memory — MCP server

Persistent memory for AI agents. Your agent saves and reads JSON across sessions and restarts. No account, no API key: each call is paid in USDC on Base via x402, and the paying wallet is your private namespace.

ToolPrice
memory_set (key, value)$0.002
memory_get (key)$0.001
memory_list$0.001

$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-mcp

Claude 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

Frequently asked questions

What is Port 402 Memory?

Persistent memory for AI agents, paid per call in USDC on Base (x402). No account, no API key.

How do I install Port 402 Memory?

Follow the installation steps in its documentation, shown on this page and in its repository.

Does Port 402 Memory need an API key?

Yes. It expects PORT402_PRIVATE_KEY, which you set in its configuration.

Is Port 402 Memory open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Port 402 Memory?

It is published by Tifdt. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.