Call the Instagram Graph API (graph.facebook.com) with curl + jq. The connector injects $INSTAGRAM_ACCESS_TOKEN (a token with instagram_content_publish + pages_read_engagement; a Facebook Page token or an Instagram-Login user token) and optionally $INSTAGRAM_IG_USER_ID. Never echo them.

Instagram publishes only images / videos / reels to a professional (Business or Creator) account linked to a Facebook Page. There are no text-only posts.

Resolve the Instagram account id

If $INSTAGRAM_IG_USER_ID is set, use it. Otherwise derive it from the token — try the Page-token path first (/me is the Page), then fall back to the user-token path (/me/accounts → linked Page → IG account), so either token type the connector accepts resolves cleanly: