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OFFICIAL ONCEASK MCP SERVER

An MCP server for current addresses and private physical delivery.

OnceAsk gives compatible AI assistants a standard way to resolve a known person to a current, permissioned delivery destination—or request confirmation when the address is missing or stale.

Create your OnceAskRead the MCP docs
Addresses change.Registered as io.github.rsb6061/onceask in the official Model Context Protocol Registry.

Resolve people, not stale strings

The preferred MCP tool is resolve_delivery. The agent starts from the person the user means, and OnceAsk determines whether a current authorized delivery destination exists instead of blindly trusting an old address field.

  • resolve_delivery
  • Structured status responses
  • Current-address checks

Request permission as a declared next action

If the recipient's address or permission is missing, the MCP response tells the agent to call request_delivery_permission. That lets the recipient confirm the information rather than having the model improvise.

  • Explicit consent flow
  • OAuth 2.1 + PKCE
  • No guessing from contact history

Fulfill without raw-address retrieval

Supported OnceAsk fulfillment tools can use an opaque, short-lived delivery token so the physical destination can travel server-to-server to the provider without being returned as ordinary model output.

  • list_handwritten_cards
  • send_handwritten_card
  • Privacy-preserving physical actions

HOW IT WORKS

Ask once. Keep the result useful.

1

Connect the OnceAsk MCP server

Use https://onceask.com/_api/mcp. Consumer clients can connect through OnceAsk OAuth; developer integrations can use least-privilege API credentials.

2

Call resolve_delivery

Pass a known contact ID or the person's name. OnceAsk returns authorized, permission_required, address_update_required, ambiguous, or not_found.

3

Follow the structured next action

Request recipient confirmation when required, then use an authorized fulfillment action rather than exposing the destination to the model.

BUILT FOR PEOPLE + AI

Addresses should be live data, not a stale field in a contact card.

OnceAsk gives people one current address to maintain and gives compatible assistants a permissioned way to resolve or request the delivery information they need.

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QUESTIONS

What to know

What is the OnceAsk MCP server?

It is OnceAsk's Model Context Protocol endpoint for AI clients. It exposes tools for current-address resolution, recipient permission requests, and supported physical-delivery actions.

What is the OnceAsk MCP endpoint?

The remote MCP endpoint is https://onceask.com/_api/mcp. The server is also published in the official MCP Registry under io.github.rsb6061/onceask.

Is OnceAsk a contacts MCP server?

Yes, but its distinctive focus is current mailing-address and physical-delivery workflows. It supports contact tools as well as a privacy-preserving delivery-specific tool surface.

RELATED

More ways to use OnceAsk

AI agent address bookWhy assistants need a current address layer rather than static contacts.Mailing address APIUse the same current-address model through developer APIs.Developer quickstartCreate credentials and call the delivery resolution API.Send gifts without an addressSee a concrete physical-action use case for the MCP flow.

Collect it once. Keep it current.

Build an address book that is still useful the next time you need it.

Create your OnceAsk