PostSider

What it is

PostSider is a social publishing platform built for humans and AI agents: one calendar to schedule and publish across 30+ networks, plus an agent bridge over MCP, REST, and SDKs so Claude / Codex / Cursor (or your own agent) can draft, queue, and publish without per-platform glue code. We verified https://postsider.com/ on 2026-09-24 (HTTP 200). Public materials cover a drag-and-drop content calendar, per-network tailoring, media library and live previews, best-time queues, analytics, team seats and approvals, an AI post checker / caption rewrite (built-in or bring-your-own OpenAI key), and security claims including AES-256-GCM encryption on channel tokens, SSRF/CSRF hardening, rate limits, and per-channel least privilege. Site pricing (verified on the homepage): Standard $20/mo (1 seat, 5 channels, 400 posts/mo) with a 7-day full trial, no credit card; higher tiers called out in copy for more channels / unlimited team members (e.g. ~$35 for 10 channels in FAQ comparisons). Solo founder: Łukasz Blania (Lumi Zone, Poland).

Who it is for

Solo founders and creators who outgrew juggling native apps; agencies running many brands with approval queues; and builders who want agents to own the publish loop through MCP/API instead of browser macros. Coming-from-Buffer/Hootsuite migration guides are on the site. If you only post to one or two networks a week and never want an API, a free native scheduler may be enough. If you need a full creative suite that generates endless AI posts for you, PostSider’s own FAQ pushes back: the AI is framed as check/refine, not spam auto-generation.

Why we listed it

Fresh public launch: Product Hunt featured PostSider on 2026-09-21 (~3 days before this listing; ~90 upvotes / ~18 comments, ~#13 of day), live product verified 2026-09-24. Marketing niche on our board already has Naise AI / Harbor-adjacent tools, but agent-native social infrastructure (MCP + REST + SDK with a human calendar) was a clear gap versus “AI writes captions” toys. Maker-shipped, priced flatly, and not a Buffer/Hootsuite household brand.

Caveats

We have not run a paid month or connected production brand accounts. “30+ networks” and best-time scheduling are maker claims — verify the exact networks you need (especially TikTok / YouTube Shorts / Discord quirks) before migrating a live queue. Agent publish rights are powerful: treat MCP tokens like production credentials and keep human approval on for brand accounts. Early-product risk: analytics depth vs mature schedulers, and how team approvals behave when an agent and a human edit the same slot.