Five platforms. One API.
Multicast is the unified social media API provider. Integrate before your morning standup. Scale to thousands of accounts.
Supported platforms
Everything you need, and more.
We’ve done the heavy lifting, so you can ship fast, without the maintenance multiplier every platform brings.
Hosted OAuth
Multicast hosts the OAuth flow for you. No dev apps, or platform approvals.
Rate-limit orchestration
We track every platform’s limits per account and queue inside them. Platform 429s become our problem, not yours.
Retries & idempotency
Transient platform failures retry with exponential backoff. Idempotency keys make double-posts impossible.
Media pipeline
Upload once. We transcode, resize, and validate to each platform’s spec automatically.
Publishing
Create, update, and delete posts across every connected account with one request.
Scheduling
Queue content for any time, any timezone. Change your mind up to the minute it ships.
Webhooks
Delivery confirmations, failures, and engagement events, pushed to your endpoint in one consistent format.
Engagement
Read and reply to comments across platforms through one model
Analytics
Impressions, engagement, and audience metrics, normalized across platforms.
Ready for your thousandth account, not just your first.
Most social tools are built around connecting an account. Multicast is built around operating a fleet — agencies, platforms, and products running social at serious scale.
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Workspaces & role-based access
Isolate clients and brands. Scope every API key and teammate to exactly what they should touch.
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Audit logs
Every post, every API call, every permission change — recorded and exportable.
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Bulk operations
Connect, publish, and report across hundreds of accounts in a single call.
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Quota intelligence
Per-account rate budgets and usage analytics, so one noisy client never starves the rest.
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SSO
SAML and OIDC sign-on for teams that need it.
Who builds on Multicast.
Product teams
Add social publishing to your product without owning five integrations. Your roadmap stays yours.
Agencies & social tools
Operate thousands of client accounts through one API, with audit trails and role-based access built in.
Brands & internal tools
Automate your own presence with a cron job and an API key instead of fifteen open dashboards.
Boring, the way infrastructure should be.
You’re making us a load-bearing dependency. We act like it.
- OAuth tokens encrypted at rest, refreshed automatically
- Least-privilege scopes — we request only what your use case needs
- Idempotent writes and automatic retries on every endpoint
- Public status page and changelog
- GDPR-ready, with a data processing agreement available
- Month-to-month plans and full data export — no lock-in
Questions developers actually ask.
What happens when a platform changes its API?
Nothing, on your side. Absorbing platform churn is the product. When a platform ships a breaking change, we migrate behind the interface — your integration doesn't move.
What if a platform changes its pricing or access terms?
We pass material changes through transparently, with advance notice — never buried in an invoice. And you're never trapped: plans are month-to-month and your data exports in full. We can't control what platforms do. We can control how honestly we handle it.
What about X, specifically?
X runs the most volatile API program in the industry, and we treat it accordingly: conservative architecture, compliant access, and immediate communication if terms shift. And if the worst happens on any single platform, the rest keep posting — that's the point of one abstraction over five dependencies.
Do I need my own developer apps or platform approvals?
No. Accounts connect through Multicast's hosted OAuth. No developer applications, no review queues, no API keys to manage per platform.
Will this put my accounts at risk?
No. Multicast works through each platform's official APIs and approved access programs — no scraping, no reverse-engineered endpoints, no automation outside platform terms. Hosted OAuth is the mechanism the platforms built for exactly this.
Which platforms are supported?
X, Instagram, TikTok, YouTube, and Facebook at launch. More are on the roadmap — tell us what you need next.
How do rate limits work?
We track each platform's limits per account and queue your requests inside them, so platform 429s are our problem. Your requests to Multicast have generous limits of their own, documented in full.
Is there a sandbox?
Yes. The full API runs against simulated accounts, so you can build and test the entire integration before connecting a real one. Sandbox usage is free and unlimited.
Coming from another unified social API?
The concepts map almost one-to-one, and most migrations fit in a weekend. Talk to us — we'll help you move.
Sign up, grab a key, make your first post in five minutes. Free tier, no credit card.