White-label social media API for agencies

Publish, reply, report and run ads for every client from your own dashboard. Official platform APIs underneath, your brand on top.

  • SOC 2
  • GDPR compliant
  • 99.97% uptime
  • Multi-tenant

Join 200,000+ of the world's most ambitious developers and builders

ACT.agency
Warner Music Group
ClickUp
RE/MAX
Heymark
Vibiz

Why Zernio?

Rent a social media tool, or build on the official APIs

Social platforms like Hootsuite and Buffer

  • Features stop where the tool stops

    You get what they chose to build on each platform.

  • Priced per seat

    The bill moves up with plan tier as you grow.

  • Features depend on your plan

    Analytics, inbox and approvals sit behind upgrades.

  • Their product, their logo

    Your clients log into someone else's tool.

Zernio social media API

  • Built on the official platform APIs

    The limits you meet are the platforms' own, not a tool's.

  • Predictable pricing

    You pay per connected account, never per post.

  • Every feature included

    Publishing, inbox, analytics and ads on every account.

  • Your dashboard, your brand

    Clients work in your product, on your domain.

How It Works

Onboard a client in three steps

1
New client
Harbor Coffee
Create profile

Create a profile for the client

One call with their name. That's their workspace, kept apart from every other client's.

2
Connect link
app.youragency.com/connect/hc
Instagram connected@harborcoffee

Send them a connect link

They approve each account on the platform's own screen. You never see a password, and you need no developer app of your own.

3
Mon 09:00 · Winter menu launchscheduled
Priya N. · Instagram DMreplied

Publish, reply and report

Schedule posts, answer the inbox and pull analytics for that client, from your product or the dashboard.

What you can build

Everything you run for a client, under your name

Northlight StudioMonthly report · Harbor Coffee

Reach184.6K
Engagement6.4%
Followers+1,203
Last 30 days

Branded client reporting

Pull every client's metrics on their own and present them in your format, on your domain.

All platformsHarbor CoffeeUnread

Priya N. · DM

Do you still have the oat flat white?

2m

Dana R. · Comment

What time do you open on Sunday?

6m

leahmarx · Comment

Need this in Berlin

1h

Tom Becker · DM

Thanks, got it!

3h

Unified inbox for DMs and comments

Every client conversation arrives in one place, ready to answer from your product.

Review management

Read and answer Facebook and Google Business reviews.

Separate paid social reporting

Show what the content earned and what the budget bought.

Bulk scheduling

Import up to 5,000 posts from a CSV, with a dry run first.

Danijel Dercksen
“We're now at the level where we're thinking, this is actually pretty good to have in our platform. But as soon as clients ask for more, I know with Zernio we can add those things quickly.”
Danijel DercksenDigital Director, ACT.agency
Read the full story
The ACT.agency team8 white-label client workspaces
The API

Build it into your own product

One REST API over every platform's official API. Clients connect once, and you build the dashboard they see.

Read the docs

post on a client's behalf

// every account this client connected
const { data: listed } = await zernio.accounts.listAccounts({
  query: { profileId },
});

const { data: published } = await zernio.posts.createPost({
  body: {
    content: 'Posted from your app.',
    platforms: listed.accounts.map((a) => ({
      platform: a.platform,
      accountId: a._id,
    })),
    publishNow: true,
  },
});
MCP with an agent

Or run your clients in plain language

Connect Claude, ChatGPT or Cursor to the Zernio MCP server. Same accounts, same data, no code.

See how agents connect

claude

> schedule Harbor Coffee's winter post
  for Monday 9am on Instagram and TikTok

call_tool · posts_create · 2 accounts
done · scheduled Mon 3 Nov, 09:00

> which clients have unread DMs?

call_tool · inbox · 6 profiles
done · Harbor Coffee 3, Marlow Hotels 7
What it costs

You pay per connected account. Every feature is included.

No seats and no plan tiers. The rate drops as you add clients.

Your agency

ClientsOne workspace each
1830100500
Accounts per clientInstagram, TikTok, Google Business and so on
13568
Zernio$338per month
Per client$8.45per month

120 connected accounts. Your next client adds $3 a month.

First 2 accounts
Free
3 to 10
$6 each
11 to 100
$3 each
101 and up
$1 each

Included on every account: publishing, inbox, analytics and ads, with unlimited posts and no per-seat fee.

Beyond social

Everything client-facing, not just posting

WhatsApp, phone numbers, DMs and ads run on the same API and the same client workspaces.

WhatsApp API

Broadcasts, templates and flows for every client

Today

Don't miss out!

Hi Marc, for the next 24 hours only, all winter jackets are 50% off.

🛒 Shop the collection: zernio.shop/sale

The North Store

12.00

You

Don't miss out!

Hi Marc, for the next 24 hours only, all winter jackets are 50% off...

Oh nice, been waiting for these 👀

12.00
Phone numbers

A real number for each client

Remind MeMessage
DeclineAccept
+1 (415) 555-0142AI Agent
Messaging API

Every DM, one API

@leahmarx Ship to Berlin?

@sofia In stock? 😍

@casa.lumen Order update? 🙌

Ads API

Boost posts and run campaigns

Meta Ads

Pricing launch

$412

Summer Sale

$40/day

Active

Retargeting

$30/day

Paused
Comments to DM API

Turn comments into DMs

@lucia_dev Guide 🙌

@andrewww_ Guide

lucia_dev

Here's the guide 👇 · now

andrewww_

Here's the guide 👇 · 1m

Frequently Asked Questions

Put your brand on your clients' social

Create a workspace, send a connect link, publish the first post.

  • SOC 2
  • GDPR compliant
  • 99.97% uptime
  • Multi-tenant