Connect an agent

Connect PostOnce to ChatGPT, Grok, Cursor, or Claude

PostOnce is a social scheduler run from Ireland. You add one hosted MCP URL in your client, sign in to PostOnce in the browser, and hit Allow. After that the bot can list the accounts you already run and save unscheduled drafts. It waits for a yes before publish or schedule. Never paste passwords, 2FA codes, refresh tokens, or API keys into the chat.

MCP URL

Streamable HTTP. Most clients choose OAuth and open the browser. Leave client id and secret empty unless your client already registered.

https://postonce.app/api/mcp

Setup articles

Each client has its own URL with the clicks for that product. Open the article that matches the app you are in.

ChatGPT

Developer Mode, then a plugin / developer-mode app with the MCP URL. Plus, Pro, or Business. The free tier cannot add a custom MCP server.

Add PostOnce in ChatGPT

Grok

Custom connector on grok.com, or the Grok Bot plugin URL. grok.com uses the public MCP URL. The plugin path uses a referral URL.

Add PostOnce in Grok

Cursor

Settings → MCP, or a .cursor/mcp.json snippet with the hosted URL. Cursor runs OAuth in the browser. There is no global catalog listing.

Add PostOnce in Cursor

Claude

Custom connectors on Team or Enterprise. Personal Claude.ai has no public catalog, so you will not find PostOnce by browsing.

Add PostOnce in Claude

MCP

Endpoint, OAuth authorize and token, dynamic client registration, scopes, and Bearer for any other client.

Endpoint, OAuth, and Bearer

Privacy · Terms