# Postauto

> Postauto is a social publishing scheduler for founders, operators, and AI agents. One composer and one departures board publish to 16 networks; posts are scheduled once and "depart" to every selected channel with per-channel results and readable errors. Free plan: 1 channel · 15 posts a month.

Key facts:
- 5 networks are live today; 11 are fully built and in early access, 7 awaiting their own network's review and 4 awaiting our own application setup.
- The composer enforces every network's character limit before scheduling.
- Social credentials are encrypted (AES-256-GCM) at rest; agents never need to hold network tokens.
- Times are stored in UTC and shown in the user's timezone.

## Networks

- [X](https://postauto.io/channels/x): early access (built, we are finishing the connection). 280 characters; Text posts, Link posts, Images (up to 4).
- [LinkedIn](https://postauto.io/channels/linkedin): early access (built, we are finishing the connection). 3,000 characters; Text posts, Article links, Images (up to 9).
- [Bluesky](https://postauto.io/channels/bluesky): live. 300 characters; Text posts with rich links and mentions, Images (up to 4).
- [Telegram](https://postauto.io/channels/telegram): live. 4,096 characters (1,024 for media captions); Channel and group posts, Photos, videos, media albums (up to 10).
- [Discord](https://postauto.io/channels/discord): live. 2,000 characters; Channel messages, File attachments (up to 10).
- [Instagram](https://postauto.io/channels/instagram): early access (built, awaiting platform approval). 2,200 characters; Feed photos (JPEG), Reels.
- [Facebook](https://postauto.io/channels/facebook): early access (built, awaiting platform approval). 63,206 characters; Page posts, Photo posts.
- [Threads](https://postauto.io/channels/threads): early access (built, awaiting platform approval). 500 characters; Text posts, Image posts, Carousels up to 20 images.
- [TikTok](https://postauto.io/channels/tiktok): early access (built, awaiting platform approval). 2,200 characters (caption); Video posts.
- [YouTube](https://postauto.io/channels/youtube): early access (built, awaiting platform approval). 5,000 characters (description); 100 characters (title); Video uploads (including Shorts).
- [Pinterest](https://postauto.io/channels/pinterest): early access (built, awaiting platform approval). 800 characters (description); 100 characters (title); Image pins.
- [Reddit](https://postauto.io/channels/reddit): early access (built, we are finishing the connection). 40,000 characters (description); 300 characters (title); Text posts, Link posts.
- [Slack](https://postauto.io/channels/slack): live. 4,000 characters; Channel messages.
- [WordPress](https://postauto.io/channels/wordpress): live. 100,000 characters (description); 255 characters (title); Posts, Images.
- [Tumblr](https://postauto.io/channels/tumblr): early access (built, we are finishing the connection). 100,000 characters (description); 255 characters (title); Text posts, Photo posts, Tags.
- [Google Business Profile](https://postauto.io/channels/googlebusiness): early access (built, awaiting platform approval). 1,500 characters; Listing updates, One photo per update, A button.

## Tools

Free, no account, run entirely in the browser. Every figure comes from the same tables the publisher uses.

- [Social media character counter](https://postauto.io/tools/character-counter): Paste a draft and see whether it fits every network at once. Most counters call String.length and are wrong on the networks that count graphemes, UTF-8 bytes, UTF-16 units or weighted code points. This one counts each network the way that network does.
- [Thread splitter](https://postauto.io/tools/thread-splitter): Cut a long piece of writing into numbered parts that each fit. It breaks at a blank line first, then a sentence end, then a word, and never mid word. Every cut is measured with the network's own counter rather than with a character count.
- [Image and video checker](https://postauto.io/tools/media-check): Drop in a photo or a clip and find out which networks would refuse it. The file is measured in your browser and never uploaded. Where nothing is recorded for a network, the answer says so instead of showing a tick.

## For AI agents

- REST API: live at https://api.postauto.io/api/v1. Send an API key as a bearer token: Authorization: Bearer pau_live_... Create a key in the app under Settings, API keys. See https://postauto.io/mcp
- MCP server: live at https://api.postauto.io/api/mcp. Streamable HTTP, stateless, same API key. 31 typed tools: list_accounts, list_clients, resolve_client, account_status, list_tags, list_media, get_network_rules, split_into_thread, next_slot, upload_from_url, create_post, update_post, publish_post, retry_target, delete_post, list_posts, search_posts, get_post, get_post_metrics, top_posts, list_notifications, acknowledge_notifications, list_feeds, preview_feed, watch_feed, update_feed, unwatch_feed, list_repost_rules, create_repost_rule, update_repost_rule, delete_repost_rule.
- Rate limits: 120 a minute reads, per key; 30 a minute writes, per key; 20 a minute per address, before the key.
- No SDK required: any agent that can send JSON over HTTPS can publish through the public API.

## Links

- [Home](https://postauto.io/)
- [Channels](https://postauto.io/channels)
- [Tools](https://postauto.io/tools)
- [For agents](https://postauto.io/mcp)
- [Pricing](https://postauto.io/pricing)
- [Changelog](https://postauto.io/changelog)

## Optional

- [Legal](https://postauto.io/legal): terms, privacy, cookies, security and the subprocessor list.