Social, community, and owned media
Supported platforms.
Know what connects.
Check your destination, supported format, and account requirements before signing up. Live connectors can be configured with eligible credentials; Beta and Approval required connectors have additional release gates.
Connect your first channelReady to configure
Add valid destination credentials and publish within the account and API limits that platform gives you.
Integration testing
Not yet self-service. Early access opens only after permissions and delivery checks are complete.
Platform gate
The connector depends on platform app review, account eligibility, paid API access, or elevated permissions.
Connector directory
28 publishing integrations.
Check each requirement.
The catalog includes live and default-off connectors, including Matrix's unencrypted-room beta and Reddit's approval- and canary-gated beta. Status describes PostOnce.co availability, not a promise that every account is eligible. Destination limits and policies always apply.
Live
Available when you add your own platform credentials.
Posts · Images · Short video
Text, image, and preprocessed MP4 video posts through AT Protocol.Posts · Images · Short video
Instance-aware publishing with content warnings.Posts · Images · Carousels · Short video · Long video
Channels and groups via the Bot API; up to 10 images/videos per media group, with signed-URL media limited to 5 MB images or 20 MB video.Posts · Images · Short video · Long video
Text plus up to four image/video attachments through scoped webhooks, with a 10 MiB per-file product limit.Articles · Images
Publish HTML articles with categories, tags, and an optional featured image.Articles · Images
Draft-first HTML articles with an optional feature image through the Admin API.Articles
Unofficial, draft-first Markdown article publishing through the DEV/Forem API.Articles
Markdown email campaigns to one verified Listmonk list through a least-privilege API user.Posts · Images · Short video
Broadcasts to Official Account friends; this is not a LINE VOOM post.Beta
In integration testing; availability depends on connector configuration and platform access.
Posts
Text messages to one joined, unencrypted room through a device-backed access token; default-off until token custody and a credentialed canary pass.Posts · Images · Short video · Long video
Messages and file shares to channels where the PostOnce Slack app is already a member.Posts
Self-channel live-chat messages and announcements, not durable feed posts; default-off until consent, hourly validation, durable refresh custody, commercial-use review, and a credentialed canary pass.Posts
Immediate self-channel live-chat messages, not durable feed posts; default-off until preview controls, commercial-use approval, and a credentialed canary pass.Posts · Articles
Markdown posts to forums the signed-in Whop user explicitly authorizes.Articles
Pro-publication GraphQL publishing stays disabled until PAT custody is approved and a private canary passes.Posts · Images · Carousels · Short video
Integration is in testing and opens after Meta permissions are approved.Short video · Long video
Upload and scheduling require Google OAuth verification and quota.Images · Carousels · Short video · Long video
One-to-five-image Pins and streamed Video Pins with a cover image are wired behind review and canary gates.Images
One 4:3 GIF, JPEG, or PNG shot through an explicit user-approved publish action.Posts · Articles
Local-community posting with a dedicated non-admin bot account; default-off until policy and credential-lifecycle canaries pass.Posts · Articles
Self and link posts to one selected subreddit; default-off until commercial approval, app review, refresh custody, and credentialed submit/receipt/revoke canaries pass.Posts · Images
Access is limited to approved Business Profile API projects.Posts · Images · Short video
OAuth publishing is gated until the app policy review and a private canary pass.Approval required
Connector access depends on the platform reviewing your app or account.
Posts · Images
Requires Meta business verification, scopes and app review.Images · Carousels · Short video
Professional-account JPEG, mixed carousel, and Reel publishing requires Meta review.Short video · Long video
Direct Post access and unaudited-client restrictions apply.Posts · Images · Short video · Articles
Organization publishing requires approved products and roles.Posts · Images · Short video
API access is plan-dependent and requires an eligible developer app.Format map
Choose destinations by the work you actually make.
* Mastodon video is listed under Short video in the PostOnce catalog; the actual media limit depends on the connected instance. Mastodon reads each instance's advertised limits when the account connects, with a PostOnce cap of four images or one ready video and conservative defaults for older connections. LINE video broadcasts use one HTTPS MP4 of at most 200 MB plus one JPEG/PNG preview of at most 1 MB. Pinterest Video Pins use one 4–300 second video of at most 100 MB plus one cover image. Telegram URL delivery is capped at 20 MB per video; Discord is capped at 10 MiB per file and 25 MiB total. Destination account and API limits can be stricter.
Connection requirements
Your accounts.
Your credentials.
PostOnce.co uses each platform’s supported authorization or key flow. The default-off Lemmy beta is the exception: it briefly exchanges a dedicated bot account password for a one-week JWT, then discards the password.
App password
User-managedInstance authorization
Instance limitsBot token + chat permission
User-managedIncoming webhook
Channel-specificSite URL + application password
REST APISite URL + Admin API key
User-managedDedicated API key
User-managedDedicated PAT + Pro publication
Canary gatedOAuth 2.1 + PKCE/OIDC
Default-off · no credentialed canaryDedicated bot + local community
Default-off · policy and canary gatedDevice token + joined room ID
Default-off · unencrypted rooms onlyOAuth self-channel live chat
Default-off · consent, refresh custody and canary gatedPermanent OAuth + one subreddit
Default-off · approval, rate control, refresh custody and canary gatedInstance + scoped API user
Self-hostedMessaging API channel token
BroadcastBusiness assets, requested permissions, and Meta app review can be required before publishing.
Publishing access depends on TikTok developer review and the connected account’s eligibility.
Organization and member publishing permissions may require separate review and admin rights.
Available endpoints and write limits depend on the developer plan attached to your app.
Platform questions
Know the gate before the campaign.
01What does Live mean?
The connector is available in PostOnce.co and can publish after you provide valid credentials with the required permissions. Your platform plan, account type, and API limits still apply.
02What does Beta mean?
The connector is in integration testing and is not yet self-service. Early-access workspaces may be invited after the required platform permissions and reliability checks are complete.
03Who handles Approval required?
You own the connected platform account and any developer app. PostOnce.co guides the setup, but the platform controls review timelines, eligibility, permission grants, and API pricing.
04Can I request another destination?
Yes. Tell us the destination, the format you publish, and whether it is a source or an output. We prioritize connectors with stable, permitted publishing APIs.
Start with a supported publishing route.
The Bluesky and Mastodon walkthrough covers account checks, caption differences, and scheduling.
Connect one channel. Build from there.
Create a free workspace and test a Live connector, or open the demo without connecting an account.