Connect posterly to Muse as a Custom Connector. Start with OpenAPI and a Bearer key. Hosted MCP is optional. Not a Muse directory listing.

Connect posterly to Muse with a Custom Connector. Start with OpenAPI and a Bearer key. Hosted MCP is optional.

The public setup page is /muse. posterly is not listed in the Muse directory yet, so you add it yourself as a Custom Connector, which takes a couple of minutes.

What Muse can do

List connected social accounts
Schedule posts after the user confirms the exact caption, account, media, and time
Create browser connect sessions so the user authorises social accounts in their own browser

Primary: OpenAPI plus Bearer

OpenAPI: https://www.poster.ly/api/openapi
API reference: /reference

After paid signup, copy a Bearer key that starts with pst_live_ from Dashboard → API & MCP. Prefer OAuth if Muse accepts the well-known metadata at /.well-known/oauth-protected-resource and /.well-known/oauth-authorization-server.

Optional: hosted MCP

MCP setup: /mcp
Hosted MCP: POST https://www.poster.ly/api/mcp

Hosted MCP is JSON-RPC 2.0 over a single POST. It does not implement SSE or streamable HTTP in v1. If Muse Custom Connector requires streamable HTTP, stay on OpenAPI and treat hosted MCP as a known gap.

Approval gates

Validate first, show the preview, and wait for an explicit yes before publish or go-live
Social connect stays in the browser via connect sessions
Signup uses the existing posterly Stripe checkout handoff

Copy the agent-facing setup prompt from /muse.