OnceAsk MCP Server

by rsb6061 Your server? Claim it

answering

OnceAsk is answering right now. Last checked 11 min ago. It exposes 4 tools. Last commit 14 Oct 2026.

MCP server for OnceAsk, the AI-native current-address layer for people and agents.

Uptime history 47 days of history · worst day 0%

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

678 ms

Response time

average over 24h

Stars

last commit 14 Oct 2026

Nothing serious here today

Today is the operative word: we check OnceAsk every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add onceask --transport http https://onceask.com/_api/mcp

Settings → Connectors → Add custom connector, then paste this address

https://onceask.com/_api/mcp

~/.codex/config.toml

[mcp_servers.onceask]
url = "https://onceask.com/_api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "onceask": {
      "url": "https://onceask.com/_api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "onceask": {
      "type": "http",
      "url": "https://onceask.com/_api/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

handwritten

list_handwritten_cards

List available Handwrytten card designs and handwriting styles for privacy-preserving fulfillment. Does not expose recipient address data.

request

request_delivery_permission

After the user explicitly confirms they want the recipient contacted, ask OnceAsk to request a current delivery address/permission. Accepts either a recipientId from resolve_delivery or a person's name/email. OnceAsk searches its contacts and connected Google/Gmail-derived people, then emails the secure request when possible without revealing the recipient email or street address to the agent.

resolve

resolve_delivery

Preferred privacy-preserving way to send something to a person. Searches OnceAsk first and, when connected, can discover a missing person from Google Contacts or Gmail interactions. Resolves to a short-lived one-time delivery token when recipient permission and a current address exist. Does not return the street address.

send

send_handwritten_card

Fulfill a handwritten card using a delivery token returned by resolve_delivery. OnceAsk sends the recipient address directly to the fulfillment provider; the agent does not receive it.

Endpoints

URL	Transport	State	Latency	Checked
https://onceask.com/_api/mcp	streamable-http	answering	590 ms	11 min ago

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OnceAsk — questions

Answers built from our own checks of this server.

What can OnceAsk do?

It exposes 4 tools, read directly from the server on our last check. Among them: list_handwritten_cards, request_delivery_permission, resolve_delivery, send_handwritten_card. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is OnceAsk working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 678 ms. The bar chart above shows every period we have measured.

How do I connect OnceAsk?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does OnceAsk need an API key?

No. OnceAsk completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is OnceAsk?

It answers our handshake in 678 ms on average, which is faster than 14% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is OnceAsk open source?

We cannot say either way: written in JavaScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.