What Is Zernio? Social Media Posting API and MCP, Free Accounts, Per-Account Pricing, Connecting to Claude and Security

You connect your social media accounts to Zernio, then schedule and publish posts through the API or by telling your assistant via MCP. It describes itself as “marketing infrastructure for agents”: it also covers ads (8 networks), blogs (WordPress/Shopify) and WhatsApp/SMS/calls. There are no plans, just tiered per-account pricing: the first 2 connected social accounts are free (no card), then accounts 1-10 cost $6/month, accounts 11-100 $3/month, 101+ $1/month; posts are unlimited. Because MCP access is account-wide, a connected assistant can delete posts, send messages and spend ad budget. The company is Spanish (Zernio Software SL).

What it does: Schedules and publishes posts via API and MCP
Free: First 2 connected accounts, no card
MCP access: Account-wide; broad
Turkish: Not stated in the official documentation
Price: $6/month per account (1-10), then $3 and $1

What does Zernio do?

You connect your social media accounts to Zernio and schedule and publish posts through the API, the dashboard or an AI assistant (MCP). The documentation lists 16 platforms (the llms.txt header says 17); on top of that there are 8 ad networks, WordPress and Shopify blogs, and WhatsApp, SMS and calls. Snapchat can't be connected right now (403 PLATFORM_BETA_RESTRICTED, no date given). The phrase “formerly Late” does not appear on the official site; getlate.dev simply redirects to zernio.com.

Scheduling posts from one placeWhat you get: Scheduled postBuilt into the app Connecting to Claude via MCPWhat you get: Agent accessNeeds a connection

Who it's for: agencies managing several brand accounts, developers building automations and anyone who wants to schedule content with an AI assistant.

How do you connect Zernio to Claude?

Create a Zernio account and connect your social accounts.
In Claude, choose Settings then Connectors then Add custom connector.
URL: https://mcp.zernio.com/mcp
Click Connect and approve access in Zernio.

Access is account-wide: from the moment you approve, the connected assistant can call any Zernio tool on your behalf (delete posts, send messages, disconnect accounts, spend ad budget). To revoke it, go to Settings then Connected apps. The plugin README says “300+ tools”, the documentation says “20 core tools”.

Is Zernio free? Per-account pricing

First 2 accounts$0 no card

2 connected social accounts
Unlimited posts
X account (card required)

Accounts 1-10$6 /account/month

Tiered pricing
First 10,000 inbox messages a month free

Accounts 11-100$3 /account/month

Tiered pricing

101+ accounts$1 /account/month

Tiered pricing

A fixed monthly credit of $12 is deducted. Connecting an X (Twitter) account requires a card, and X's API fee is passed through separately at cost, with no markup. Prices are in US dollars; there is no Turkish lira price or VAT (KDV) note. The pricing page says “no plans”, while the Terms of Service mention “limits based on your subscription plan”: the two contradict each other.

Zernio: my data and permissions

Training

The privacy policy says content is not used to train models.

MCP access

Section 5.2: access is account-wide; once you approve, the assistant can call any Zernio tool on your behalf, including spending your budget on ads.

Turkish and country

The official documentation says nothing about a Turkish interface, Turkish replies or Turkish support; sign-up and payment from Turkey and acceptance of Turkish cards are not stated. Whether sign-up asks for a phone number or age is not clear in the official documentation.

Frequently asked questions

What is Zernio and what is it used for?

A platform that schedules and publishes social media posts via API, MCP and a dashboard, and also offers ads, blogs and messaging.

Is Zernio free?

The first 2 connected social accounts are free with no card. After that, tiered per-account pricing: accounts 1-10 $6/month, 11-100 $3, 101+ $1.

Is it safe to connect Zernio to Claude?

Access is account-wide: a connected assistant can delete posts, send messages and spend ad budget. Only connect it to an assistant you trust; revoke it under Settings › Connected apps.

Can Zernio connect an X (Twitter) account?

Yes, but a card is required; X's API fee is passed through separately at cost, with no markup.

Does Zernio support Snapchat?

It can't be connected right now (403 PLATFORM_BETA_RESTRICTED); no date has been given.

Related guides

Sources

Not clear in the official sources: Turkish interface, replies and support · sign-up and payment from Turkey · VAT (KDV) · phone and age verification · support email (masked) · per-platform rate limit numbers · the “formerly Late” claim. Each is covered in the relevant section along with what you can do.