How we picked
Every API here can publish to several social networks through one integration. We list them alphabetically and do not rank them, because the right choice depends on your project. We compared:
- Can you use the API on a free plan?
- Entry price and how pricing scales (per plan, per account or per post)
- SDK count and whether an OpenAPI spec is published
- Webhooks for post status
- MCP server for AI agents, and how it authenticates
The main options side by side
| Product | Pricing | Free tier | Networks | SDKs | OpenAPI | MCP server | Webhooks | n8n / Make / Zapier |
|---|---|---|---|---|---|---|---|---|
| Ayrshare | Premium $149/mo (1 profile) · Launch $299/mo (10 profiles) · Business $599/mo (30 profiles) | No; 28-day trial of Launch | 14 | Node and Python SDKs, Flutter package | Not published (Postman collection) | Yes, static API-key auth (no OAuth) | Launch plan and up | Make and n8n guides, Bubble plugin |
| Blotato | Starter $29/mo (20 accounts, 1,250 AI credits) · Creator $97/mo (40 accounts) · Agency $499/mo | No; 7-day trial excludes API and MCP | 9 | None | Yes (OpenAPI JSON) | Hosted, 36 tools, OAuth for Claude | DM-automation webhooks only | Verified n8n node, Make |
| Buffer | Free (3 channels) · Essentials $5/channel/mo · Team $10/channel/mo | Yes: 3 channels; API capped at 250 requests/day and 3,000/month | 12 + Start Page | Not documented | GraphQL API (not REST/OpenAPI) | Remote MCP server (mcp.buffer.com) and CLI, every plan | Not documented | Zapier app |
| PostBoost | Free $0 (3 accounts, 3 queued posts) · Pro $29/mo (10 accounts, 1 member) · Pro Max $49/mo (30 accounts, 3 members) | Yes: 3 accounts, 3 queued posts, full API, webhooks and MCP | 12 | 9 + CLI (Python, PHP, Node.js, Go, Ruby, Java, C#, Rust, Bash CLI) | Yes (OpenAPI 3) | Hosted MCP on every plan; API token (Bearer) auth; OAuth coming | Yes, every plan | HTTP request nodes (no native n8n/Make/Zapier app yet) |
| Postiz | Self-host free · Cloud $29/mo (5 channels) · $39 (10) · $49 (30) · $99 (100) | Self-host only; cloud has a 7-day trial | 30+ | Node.js | Not documented | Hosted, OAuth; listed in the Claude directory, ChatGPT, Cursor and Gemini CLI | Yes, every plan | n8n community node, Make |
| Upload-Post | Free · Basic $24/mo (5 profiles) · $50 · $147 · $438; annual −40% | Yes: 10 uploads/month, 2 profiles, no TikTok | 22 | Python, Node.js | Not documented | Open source (MIT), 40 tools, hosted or via npx | Not documented | Official n8n node, Make, Zapier |
| Zernio | Per account: 1–2 free, 3–10 $6, 11–100 $3, 101+ $1 (10 accounts = $48/mo) | Yes: 2 accounts with the full API | 15 social/messaging + 7 ad networks | 8 + CLI | Yes (OpenAPI 3.1) | Hosted, OAuth 2.1 with PKCE, listed in the official MCP Registry (per Zernio docs) | Yes | n8n, Make and Zapier listed as supported |
Best for…
Ayrshare
Enterprise unified social media API, priced per user profile. You build a SaaS that posts on behalf of many end users and need Snapchat, WhatsApp or Telegram today.
PostBoost vs AyrshareBlotato
AI content creation and social automation with an API and MCP. You want AI video and viral-content tooling plus ready-made n8n templates.
PostBoost vs BlotatoBuffer
Mainstream scheduler for creators and small teams, now with an API and MCP on every plan. You want the simplest scheduler, a community inbox on every plan, or Substack.
PostBoost vs BufferPostBoost
Best for teams that want a full scheduling dashboard and a developer API in one product: API, webhooks and MCP on every plan including Free, nine SDKs plus a CLI, and approvals, 2FA and SSO from $29. Weaker on network count (12) and native automation apps (none yet).
Postiz
Open-source (AGPL-3.0) scheduler with a hosted cloud and agent features. You want to self-host open source, or need channels such as Telegram, Discord or Slack.
PostBoost vs PostizUpload-Post
Simple upload API with the widest platform list. You post to blogs, Discord or Telegram as well as social networks, or need a Zapier app.
PostBoost vs Upload-PostZernio
Developer-first REST API and hosted MCP, priced per connected account. You need ad networks or messaging channels, idempotency keys, or account counts that swing up and down.
PostBoost vs ZernioOther social media APIs worth a look
Bundle.social
Free (3 accounts, 20 posts/mo) · Pro $100/mo (10k posts, unlimited accounts) · Business $400/mo · 15 networks
TypeScript SDK, OpenAPI reference, official MCP and JSON CLI, webhooks. Best for SaaS platforms with many accounts.
Post for Me
$10/mo (1,000 posts, unlimited accounts) · 9 networks
SDKs in JS/TS, Python, Ruby and Go, webhooks, open-source core. Best for low-volume per-post pricing.
Outstand
$19/mo (3,000 posts, then per post) · Business $129/mo · 12 networks
Signed, retried webhooks, idempotency keys, 28-tool MCP. No free tier.
SocialAPI.ai
Hobby $0 (2 profiles, 10 posts) · $29 (10 profiles) · $109 (50) · $349 (200) · 13 networks
Published rate limits, 75+ MCP tools in the official MCP Registry, Python SDK.
Schedule & Chill
Free (500 posts/mo, 2 channels) · 5 live networks
LinkedIn-first, full REST and a 22-tool MCP for free. Webhooks on the roadmap.
Prices last verified October 2026.
Where PostBoost is weaker
- 12 networks. Postiz (30+), Upload-Post (22), Zernio (15 plus ad networks) and Ayrshare (14) cover more, including Telegram, Discord or WhatsApp.
- No native n8n, Make or Zapier app yet. You connect with an HTTP request node and an API token.
- MCP uses an API token (Bearer) today. OAuth sign-in for MCP clients is in progress.
- The Free plan holds 3 queued posts at a time. Paid plans have unlimited scheduled posts.
- First comments on Facebook Pages and Instagram are pending Meta's app review. See the network permissions status.
FAQ
What is a unified social media API?
One API that publishes to many social networks (Instagram, TikTok, LinkedIn, X, YouTube and others), so you do not have to build and maintain a separate integration and app review for each network.
Which social media APIs are free to start?
PostBoost, Zernio, Upload-Post, Buffer, Bundle.social, SocialAPI.ai and Schedule & Chill all have a free plan with API access, each with different limits. Ayrshare, Blotato and Outstand have no free plan.
Do I need an MCP server as well as an API?
Only if AI assistants such as Claude, ChatGPT or Cursor should act on your social accounts. See our roundup of the best social media MCP servers.
Try PostBoost free
API, webhooks and MCP on every plan, including Free. No credit card required.