Port 402 Memory
LocalAbout Port 402 Memory
Port 402 Memory is an MCP server for AI agents that provides persistent memory, an inbox, and scheduled reminders. Calls are paid individually in USDC on Base through x402, without an account or API key.
Key features
- 01Cross-session key-value memory
- 02Inbox for messages from others
- 03Schedule timed reminders
- 04Signed memory exports
- 05Per-call x402 payments
Use cases
- 01Save and restore an agent's session state
- 02Receive messages while an agent is away
- 03Schedule a later agent wake-up
MCP support
As an MCP server, it exposes memory, inbox, and reminder tools to clients.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.
Tools
Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.
Details
From the project READMEPort 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-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
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.