PostSiete
One idea in → seven platforms out
On the Free plan, add your own Anthropic key to get AI-written drafts (your key, your cost — usually cents). Get one at console.anthropic.com → API Keys. It's encrypted at rest and never shown again. Pro users don't need this — AI is included.
Save up to 1 brands or clients — each with its own defaults and voice. Pick one in the composer and every draft is written for that brand.
Paste 3–5 of your best posts below, separated by a blank line. AI-generated drafts will be written in that voice instead of generic AI copy — or let AI learn your voice from them automatically.
PostSiete publishes the draft's current text at this time — keep editing until then. Times are your local timezone.
Paste the four keys from your (free) X developer app — step-by-step guide in docs/X_PUBLISHING.md. Your app must have Read and Write permission. Keys are encrypted at rest.
In the Meta app dashboard, open Use cases → Access the Threads API → Settings, add your account under Add or Remove Threads Testers, accept the invite inside Threads, then press Generate Access Token. Paste that token here. It is encrypted at rest.
A Page owned by a business portfolio needs a System User token, not a personal one. In Business settings → Users → System users, assign the Page and the app, then Generate token with pages_manage_posts and pages_read_engagement. It never expires. Encrypted at rest.
Paste an access token from a LinkedIn app with both self-serve products added: Share on LinkedIn (w_member_social) and Sign In with LinkedIn using OpenID Connect (openid, profile) — the second is what lets us confirm whose account it is. LinkedIn issues member tokens for about 60 days; PostSiete warns you a week before yours expires rather than letting scheduled posts fail quietly. Leave the author field empty to post as yourself. Encrypted at rest.
Usually the same System User token as Facebook. The account must be a Professional account linked to your Facebook Page. Instagram posts always need an image — PostSiete uses one the package already has and will never generate one just to publish. Encrypted at rest.