PostOnce (postonce.app)

app.postoncePublished by postonce.appOfficial publisherv1.0.0Updated Nov 11, 2026

Draft social posts from your AI assistant; schedules or publishes only after you confirm.

VerifiedStreamable HTTPWeb executableCommunication & Collaboration

Server details

Identifier: app.postonce/postonce
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Nov 11, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to postonce.app, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

Add a badge to your README

Show readers this MCP server is listed on SourceWeft. The badge links to this page.

[![Listed on SourceWeft](https://sourceweft.com/badge/mcp/app.postonce%2Fpostonce.svg)](https://sourceweft.com/mcp/app.postonce%2Fpostonce?utm_source=readme&utm_medium=badge)

Overview

AI-generated overview

PostOnce lets an AI assistant draft social media posts and schedule or publish them, but only after you confirm.

What you can do: Draft social posts from within an AI assistant conversation
Schedule or publish posts, gated on your explicit confirmation
No tool list, README or server instructions were supplied, so the exact set of actions is not documented here.
When to use it: Useful if you want an assistant to help compose social media content and then hand off scheduling or publishing to PostOnce, with a confirmation step before anything goes out.
Requirements: A remote MCP endpoint at postonce.app over streamable HTTP, with OAuth sign-in required. No environment variables or headers are declared.

Before you install

The server can schedule and publish social posts, which is a public, hard-to-undo action; rely on the stated confirmation step before anything is sent. OAuth grants it access to your PostOnce account, and post content is handled by a third-party service.

Installation

In SourceWeft

Open PostOnce (postonce.app) in the dashboard and add it to a workspace.
Connect the required credentials. They are stored privately and never shown on public pages.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/app.postonce%2Fpostonce/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "postonce-postonce-app": {
      "type": "http",
      "url": "https://postonce.app/api/mcp"
    }
  }
}

Tools

This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

v1.0.0LatestNov 11, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.