01
Source
Start from a brief, a file you upload, an RSS item or a request from an agent. Uploaded media keeps the provenance you gave it, including where it came from and who holds the rights. Importing a file from a URL is not built yet.
Post everywhere from your AI agent.One draft, every network.
Turn one sourced idea into platform-native content, approve it once, publish it reliably, and learn what to improve next.
Free to start. No card. Your first published posts are on us.
10Networks in the launch cohort
- X
- TikTok
- YouTube
- Bluesky
- Threads
- Google Business Profile
The same seven steps, every time.
Post Array is a publishing desk for people who are accountable for what goes out. You write once, adapt per platform, see the real limits before you schedule, get the approval you need, publish through official platform APIs, and keep a receipt for every post.
02
Compose once, then override
A master version drives every target. Selecting one account opens an override for that account only: its own text, media selection, settings, live limit counter and preview. Resetting an override restores the master in one action and shows you the difference first. In-app media editing is not built yet.
03
Validate before anything is queued
Validation is deterministic and runs on the server. It checks the platform limits from the versioned capability snapshot, the account type, alt text, media rights, duplicate and cadence rules, mention and destination resolution, and the estimated platform usage cost. Every issue names the target it belongs to and how to fix it.
04
Approve once
Approval is a workspace policy, not a habit. A reviewer sees every target, every variant, the time zone, the privacy state and the estimated cost on one screen, and it works on a phone. Content changed after approval requires approval again.
05
Schedule in a real time zone
Every scheduled post stores an instant and an IANA time zone, never a naive local time. Daylight saving transitions are shown before you confirm, not discovered afterwards.
06
Publish and keep the receipt
Each target is dispatched with an idempotency key. A target that fails does not roll back a target that succeeded, and that state has its own name: partially published. Each result produces an immutable receipt with the external post ID, the request identifier, the attempt history and the exact error if there was one.
07
Learn
Metrics are normalized, named, attributed to the platform that reported them and stamped with a freshness time. A metric a platform does not report is marked unavailable with the reason. It is never rendered as a zero.
One idea, five platform-native versions
The composer starts with a master version. Selecting one account opens an override for that account only, with its own live limits and its own preview. Nothing you write for LinkedIn changes what X receives.
Master draft
X, @northbound
Master text, shortened, plus a two post thread
Character count, thread order, estimated API cost for a link post
LinkedIn, Northbound Tools
Longer master text with the document attached
Organization role, post length, document type
Instagram, @northbound.tools
The same image selected, with a caption rewritten for the feed
Professional account type, aspect ratio, alt text present
YouTube, Northbound
The same clip as a Short, with its own title and description
Upload scope, audit state, privacy the upload will land in
Bluesky, northbound.example
Master text with the link card
Character count, link card resolution, alt text present
Where a post can go
- X
- TikTok
- YouTube
- Bluesky
- Threads
- Google Business Profile
Availability is shown account by account as each platform completes its review.
Five surfaces, one backend
The same use cases, the same tenancy checks, the same validators and the same publishing workflows. A surface is a way in, never a shortcut past a rule.
- Web app
- Remote MCP server
- REST API
- CLI
- Signed webhooks
What it costs
One plan, and every feature is in it, including the remote MCP server an agent connects to. What a plan buys is active project capacity. Starting is free, takes no card, and includes your first published posts.
$25
Billed monthly
$25 charged every month.
$250
Billed annually
$250 charged once a year.
Save $50 a year. That is 2 months free.
What Post Array does not do
These are boundaries, not a roadmap tease. If one of them changes, it changes on the changelog first.
No AI image generation and no AI video generation. Post Array adapts, approves, publishes and measures the media you bring.
No automatic likes, follows, reposts, unsolicited replies or direct messages. No engagement pods and no fabricated engagement.
No browser automation, no cookie replay, no scraping and no unofficial posting endpoints. Official platform APIs only.
No promise about reach, ranking or engagement. Post Array can tell you what happened and what to test next. It cannot tell you what an audience will do.
No unattended publishing by default. An agent can draft, validate and request approval. A human decides before anything becomes public, unless you deliberately opt a specific policy out.
Questions people ask first
What is Post Array?
A publishing control plane for social accounts. You write one master version, derive a platform native variant for each account, get it approved, and publish through official platform APIs, with a receipt for every post.
Does Post Array generate images or video?
No. It works with media you upload or import. There is no AI image or video generation of any kind.
How does Post Array reach each platform?
Only through official platform APIs. There is no browser automation, no cookie replay and no unofficial endpoint.
Can an AI agent use Post Array?
Yes, through a remote MCP server with OAuth and per tool scopes. Publishing still needs a human confirmation issued by the server.
Start with one account and one post
Connect one account, draft one post, watch the validation run, schedule it and read the receipt. That is the whole product in about ten minutes.
Free to start. No card. Your first published posts are on us.