Social media scheduler API

Zernio's social media scheduler API lets you schedule posts across 16 platforms. Plan weeks ahead, and every post publishes on time in the right timezone.

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  • 16 platforms
  • Timezone-aware
  • One API
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Simon Fairhurst@siimonfairhurst

Q3 recap is live 📈 Everything we shipped this quarter, in one place.

Simon Fairhurst@siimonfairhurst

New quarter, new desk 🌿 Which corner should we style next?

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Warner Music Group
MoFlo
ClickUp
Readdy
RE/MAX
Moving Monkey®
Supported platforms

One API. Every platform

Schedule posts to all 16 major platforms from one API

  • Reels
  • Stories
  • Carousels
  • Comments
  • DMs
  • Ads

Reels, stories, and DMs in one API

Publish, then answer the comments and DMs.

Explore Instagram
How it works

From signup to first scheduled post in three steps

1

Key name

e.g., Production API key

Permission

Read & write

Read only

Profile access

Full access (all profiles)

Create key

Get your API key

Sign up free, generate a key from the dashboard. First 2 social accounts free, unlimited posts.

2

Profile

Defaultdefault

Instagram

TikTok

X

LinkedIn

Facebook

Threads

YouTube

Pinterest

Bluesky

Reddit

Snapchat

Discord

WhatsApp

Telegram

Slack

iMessage

Google Business

Connect social accounts

Link accounts via OAuth. Each gets a unique ID for API calls.

3

Schedule post

Schedule

Now

Queue

Draft

Date & time

Tue, Oct 14

09:00

Europe/Madrid (GMT+2)

Schedule post

Schedule your post

Pick a date, time, and timezone, or drop it in your queue. We publish it automatically.

Features

Everything you need to schedule

Tue, Oct 14 · 09:00

Timezone

Los AngelesGMT-7

New YorkGMT-4

São PauloGMT-3

LondonGMT+1

MadridGMT+2

DubaiGMT+4

SingaporeGMT+8

TokyoGMT+9

SydneyGMT+11

Timezone-aware scheduling

Set the date, time, and timezone per post. Reach every audience at the right hour.

Mon 09:00

Q3 recap is live 📈 Everything we shipped this quarter, in one place.

Tue 12:00

New quarter, new desk 🌿 Which corner should we style next?

Thu 09:00

Next free slot

Weekend mood 🌊

Queues & recurring slots

Define weekly time slots once. New posts fill the next free slot automatically.

Bulk scheduling

Upload a CSV to schedule hundreds of posts at once.

Per-platform content

Customize text, media, and hashtags for each platform in the same post.

Automatic retries

Failed publishes retry up to 3 times, and a webhook tells you if one still fails.

For AI Agents

Your agent plans and schedules your content

496 tools on one OAuth connection. Nothing to install, nothing to self-host.

Know more

› claude

Claude Code v2.1.19

Opus 4.5 · Claude Max

~/software

›

✓ registered · https://mcp.zernio.com/mcp

✓ signed in over OAuth · no key pasted

✓ call_tool · 5 posts queued · Mon–Fri 09:00

✓ nothing published yet · review the queue

Claude Code session
Marketing infrastructure

Everything social, not just scheduling

Comments, DMs, analytics, and ads run on the same API and the same connected accounts.

  • Posting API

    Publish, schedule, and manage content across 16 platforms

    Simon Fairhurst@siimonfairhurst
  • Ads API

    Campaigns, boosts, and ad analytics in one API

    Meta Ads

    Pricing launch

    $412

    Summer Sale

    $40/day

    Active

    Retargeting

    $30/day

    Paused
  • Messaging API

    Every DM, one API

    @leahmarx Ship to Berlin?

    @sofia In stock? 😍

    @casa.lumen Order update? 🙌

  • Analytics API

    Every metric, one endpoint

    Views18.4K
    Likes3,410
    Views31.9K
    Comments58
    Total reach · last 7 days184.6K+12.4%
  • Comments API

    Moderate every comment

    sarah.klein

    Does this cover Threads as well?

    ReplyDMHide

    lauravisuals

    Shipped our whole calendar with this 🙌

    ReplyDMHide

    nate_builds

    Any way to schedule a carousel?

    ReplyDMHide
  • 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

  • Inbox API

    One inbox for comments, DMs, and reviews

    All platformsAll profilesAll accounts

    Olly Bennett

    · via +44 7700 900456

    Are you open on Sunday?

    2m

    Diego

    · via +1 646 555 0199

    Is my order ready to pick up?

    6m

    Nadia Okafor

    · via @nadia.okafor

    Love the new drop 😍

    9m

    Vela Notifications

    · via #orders

    New order #4821 from Lisbon

    20m

    Elias Duarte

    · via Google review

    ★★★★★ Worth the queue

    1h
  • Email API

    Read and send from Gmail and Outlook

    Lena FischerDemo on Thursday?
    now
    Contoso BillingInvoice INV-2041
    now
    northsupplyAny update on my order?
    9:40
  • Calendar API

    Events and open slots on every calendar

    Demo with Northwind

    Google Meet · 4 guests

    10:00

    Product review

    Teams · 6 guests

    12:00

    Free for everyone

    14:00 – 15:00 · 3 calendars

    Open
  • Files API

    Upload and share on Drive and OneDrive

    Launch photo.jpg
    Q4 report.pdf

Frequently asked questions

Schedule your first post today

Plan weeks ahead and publish on time across 16 platforms.

Start for freeRead the docs
  • 16 platforms
  • Timezone-aware
  • One API