MCP.Market

OnceAsk MCP server

online · 100% uptime
by rsb6061·io.github.rsb6061/onceask·v1.0.0
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MCP server for OnceAsk, the AI-native current-address layer for people and agents.

B77/100grade B
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Safety scan
B77/100

full report

Adoption
Growing

0 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

OnceAsk tools (4, 1 write)

write = sends, deletes, buys or posts
  • list_handwritten_cardsFree

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

  • request_delivery_permissionFree

    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_deliveryFree

    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_handwritten_cardwrite actionFree

    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.

Public scan report

scanner v0.1.10 · 2026-10-15 · same rubric, same numbers if you re-run it

1 high
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 2938ms17/20
  • Tool poisoning4 tool descriptions checked15/15
  • Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
  • Maintenancelast push 1 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Findings (1)

  • highWrite-action tools reachable without authenticationauth.open-write
Overall 77/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How OnceAsk compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
77/100
higher than 50% of 48,255 servers
Tools
4
the typical server has 7
Tools that change things
25%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
658 ms
faster than 21% of 30,031 servers

What its tools let an agent do: 3 read · 1 send or post

Install OnceAsk in Claude Code, Cursor or VS Code

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

What the publisher says

From the OnceAsk repository's README, as published. We do not edit it. Read it on GitHub

OnceAsk MCP

Official MCP discovery repo for OnceAsk, the AI-native current-address layer for people and agents.

Addresses change. OnceAsk keeps them current.

OnceAsk helps an AI assistant resolve a known person to a current, permissioned delivery destination instead of relying on stale contact records.

MCP endpoint

https://onceask.com/_api/mcp

Transport: Streamable HTTP

What OnceAsk is for

OnceAsk is designed for workflows where an assistant knows who someone is but may not have a current or permissioned mailing address.

Typical use cases include:

  • Retrieve a current, permissioned address for a known contact.
  • Request an address when it is missing.
  • Avoid using stale address-book data after someone moves.
  • Support gifting, concierge, clienteling, real-estate, recruiting, event, and personal-assistant workflows that need physical delivery.

Example user intent:

Get Aunt Theresa's current mailing address.

The agent should resolve the person through OnceAsk rather than guess from an old contact record.

Registry identity

MCP Registry name:

io.github.rsb6061/onceask

Registry metadata is defined in server.json.

Publish to the MCP Registry

Install the official MCP publisher, authenticate with GitHub, then publish from this repository:

brew install mcp-publisher
mcp-publisher login github
mcp-publisher publish

Then verify the listing:

curl "https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.rsb6061/onceask"

Website

https://onceask.com

Contact

requests@onceask.com

Nothing above is checked by us. What we check is on the safety report.

Grade history

  • 2026-10-15restoreD → Bscore 77: Write-action tools reachable without authentication
  • 2026-10-02downgradeB → Dscore 47: Remote endpoint did not respond

OnceAsk: common questions

Is OnceAsk MCP server safe?
Mostly: it is graded B (77/100). Read the OnceAsk safety report
How do I install OnceAsk?
It runs remotely at onceask.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does OnceAsk need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is OnceAsk maintained?
The last commit was 21 days ago (2026-10-14). The latest release is v1.0.0.
Is OnceAsk up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does OnceAsk compare with other MCP servers?
safety score 77/100 (higher than 50% of 48,255 servers); tools 4 (the typical server has 7); tools that change things 25% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.