Changelog

The API is versioned in the path. /v1 is stable: fields are added, never removed or renamed, and new event types may appear. Anything breaking will ship as /v2 with /v1 kept running.

v1 (2026-08)

First public version.

• Workspaces with external_id upsert, workspace-scoped API keys.
• Hosted connect flow for Facebook Pages and Instagram professional accounts, with redirect_url and ?connected=<n>.
• Accounts with active, expired, revoked and error statuses, refresh, disconnect and follower stats.
• Media upload by file or URL, JPEG, PNG, WEBP and GIF up to 8 MB, MP4 and MOV up to 100 MB, signed URLs valid 7 days. Instagram targets require JPEG, checked at post creation.
• Posts to one or more accounts with per-target captions, per-network options (media_type, first_comment, share_to_feed, link), drafts, scheduling, ?wait=true, per-target results and the published, partial, failed outcomes.
• Inbox: Messenger and Instagram DMs plus comments as conversations, replies with quick replies, private replies to comments, unread counts, open and closed.
• Webhooks: one endpoint per partner, HMAC-SHA256 signatures over timestamp and body, six-attempt retry schedule, GET /v1/events for polling.
• Widget: composer, calendar, inbox and accounts surfaces, server-minted embed sessions, theme and locale, widget.js loader with auto-resize, postMessage events.
• MCP server over Streamable HTTP with 13 tools, workspace-key or partner-key plus X-MissLess-Workspace auth.

Networks: Facebook Pages and Instagram professional accounts.