n8n-nodes-postwire

n8n-nodes-postwire

Publish one idea to every social network from n8n — with a different post written for each one, not the same text pasted everywhere.

PostWire handles the part that usually stops an n8n workflow: TikTok, Instagram and YouTube all require an approved developer app, and TikTok's App Review asks for a demo video of the integration you cannot build until you are approved. PostWire already holds those approvals, so connecting an account is a single OAuth click.

What the node does

Operation	What it does
Write a Post per Network	One idea in, a native draft out per network — correct length, hashtag conventions, an SEO title and tags for YouTube, a hook-first caption for TikTok, link-in-comment for LinkedIn. Does not publish.
Publish	Sends to every selected network in one call.
Write and Publish	Both, in one node.
Schedule	Queues a post for later, and validates it now — so a missing video surfaces while you are watching, not at 7am tomorrow.
Get Account	Plan, posts used this month, connected accounts.

Networks: TikTok · Instagram · YouTube · LinkedIn · X · Facebook · Reddit · Bluesky · Mastodon · Telegram · Discord.

Install

n8n Cloud — Settings → Community nodes → Install → n8n-nodes-postwire

Self-hosted — Settings → Community nodes → Install, or:

npm install n8n-nodes-postwire

Credentials

• Get a free API key at postwire.io/dashboard.html and connect the accounts you want to post to.
• In n8n, create a PostWire API credential and paste the key.
• Press Test — it calls /api/me and returns your plan and connected accounts, so a wrong key fails now rather than at publish time.

Free plan: one brand with every network it connects, 30 posts a month, no card.

Nothing half-publishes

The most common way a cross-posting workflow goes wrong is a partial send: you ask for four networks and two go out. This node checks before anything is published — that each network is connected, that the caption is inside that platform's character limit, and that video networks actually have a video. If any of them would fail, the whole call is refused and the error tells you which one and what to change.

The node also validates media in the editor, so youtube will not accept a post without a video appears before you run the workflow rather than after.

Output

Publish returns one n8n item per network, so you can wire a Filter or IF node straight onto the failures:

{ "ok": true,  "platform": "x",       "id": "1934…", "url": "https://x.com/…" }
{ "ok": false, "platform": "youtube", "error": "youtube needs a video…", "code": "media_required" }

Write a Post per Network returns { drafts: { "<platform>": { text, title?, tags? } } }.

Pricing

Priced per brand — one business with all of its networks — not per channel or per social account. Adding a fifth network to a brand never changes the bill.

	Brands	Posts/month
Free	1	30	no card
Starter	3	300	$9/mo
Pro	10	2,000	$29/mo
Agency	50	15,000	$99/mo

Also available

A REST API and a hosted MCP server (https://postwire.io/api/mcp) for AI agents in Claude, Cursor or VS Code. See postwire.io/mcp.

License

MIT