HERO
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NEW Late is now Zernio. Zero breaking changes

One API for every social, messaging and ad channel.

Publish, reply, measure and promote across 23 channels with a single REST call. We hold the platform apps, the OAuth flows, the rate limits and the retries.

Free up to 2 accounts · no credit card · no platform dev apps

zernio.ts TypeScript
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200 OK published to instagram linkedin tiktok + WhatsApp number live
NEW Late is now Zernio. Zero breaking changes

Twenty-three APIs in. One API out.

Rate limits, token refreshes, media specs and app reviews go in. Published posts, unified metrics and one webhook come out.

Free up to 2 accounts · no credit card · no platform dev apps

ONE REST CALL MEDIA FILE DM REPLY AD BUDGET SCHEDULE ONE API KEY INSTAGRAM TIKTOK WHATSAPP LINKEDIN META ADS +18 CHANNELS { content } video.mp4 "on its way" $40/day 09:00Z sk_live_… 201 created reach 18.2k msg_8f2c 200 OK spend $12.40 retry 1/3
AUTH NORMALIZE FAN-OUT RETRY
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posts published this week
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accounts connected this week
Official platform partners
CHANNELS

Every channel, already shipped. One endpoint. We hold the dev apps, the OAuth flows and the reviews.

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Learn more
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SUPPORTED
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QUEUED PUBLISHING PUBLISHED
THE SHIFT

Meet a new layer: social infrastructure. One integration between your product and every channel.

Connect every channel. Publish, reply and measure through one contract. All of it running behind your product, never in front of it.

CHANNELS

Connect once, publish anywhere

Twenty-three channels behind one auth model. New platforms arrive without a release on your side.

Reply on WhatsApp Assign
Comment thread Mark done
INBOX

Every conversation in one thread

DMs, comments and mentions normalised into a single shape, delivered by webhook as they happen.

ADS

Run paid from your own product

Seven ad networks with campaigns, budgets and reporting on the same primitives as organic.

TRIGGER
post.published
ACTION
notify · retry
WEBHOOKS

React the moment it happens

One signed event stream for publishes, replies and failures, with retries and replay built in.

ANALYTICS

Metrics that match the platforms

Reach, engagement and spend pulled on schedule and reconciled, so your dashboards stop drifting.

POST /v1/posts
channels: ["instagram", "tiktok"]
202 accepted
API

Build anything on top

REST, idempotency keys and typed SDKs. Everything the dashboard does, your product can do too.

AGENTS

Every channel docks into one API. Same tools, same payload, same auth.

Zernio hosts an MCP server at mcp.zernio.com with 300+ typed tools. Whichever channel your agent asks for snaps into the same slot: same tool names, same payload, same auth.

See pricing
TOOL CALL
posts.create
Published Webhook Auto retry

Real tool calls, not prompts

Nothing to scrape or prompt around. The agent calls posts.create, gets the publish status back, and a webhook fires when something fails.

INSTAGRAM DM
Do you ship to Portugal?
YOUR AGENT
Yes, 2 to 4 days. Want me to start the order?
sent via inbox.reply

Read and reply to the inbox

DMs, comments and reviews land in one inbox. Your agent reads the thread and replies through the same API, no per platform payloads.

mcp.zernio.com MCP

Claude, Cursor or your CLI

Hosted MCP with zero setup, a CLI that returns structured JSON, and 8 SDKs. Docs ship as a single file built for LLM context.

CUSTOMERS

Take their word for it. Teams that replaced a dozen integrations with one.

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I use Zernio for my SaaS purplepalm.ai. Integration was incredibly easy, we had everything up and running in less than an hour.
Razvan Ghetiu
Founder, purplepalm.ai
I love the speed and quality here, the API is awesome. I've never seen anyone ship integrations this fast.
Dev Singh
Founder, ad-attribution SaaS
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ALSO SHIPPING ON ZERNIO
ClickUpRE/MAXWarner Music GroupHoloHeyMarkVibizPlinng
HOW IT WORKS

Live in under five minutes. Signup to your first post, message or ad.

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API KEYSNEW
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30 SECONDS · NO SALES CALL
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HOSTED OAUTH · NO DEVELOPER APPS
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MESSAGING, SOCIAL AND ADS, SHIPPED
PRICING

Pay for what you use. No plans, no seats, every feature included.

One platform: social accounts, ads, phone numbers, calls, SMS and WhatsApp.

Start with 2 free accounts.

Self-serve
Usage-based, card on file.
$0 to start
  • 2 accounts free to start, no credit card
  • Every feature included, nothing gated behind a plan
  • Usage-based billing
  • Self-service at any scale, no sales call, cancel anytime
Start free
Enterprise
The same platform, custom terms.
Custom
  • Volume discounts past 2000 accounts
  • SAML SSO, SCIM, MFA, audit logs and role-based access
  • Dedicated Slack channel with engineering
  • SOC 2 and GDPR paperwork via the trust portal
Talk to us
YOUR ACCOUNTS
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1101001k10k
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avg ≈ {{ calc.avg }} / account
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FAQ

Questions engineers ask first.
The rest is in the docs.

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Still unsure? Read the docs

Engineered with enterprise-level security. Built for everyone.

Security is not a set of badges here, it is how the platform is built. Tokens are encrypted at rest, every call is logged, and failures surface as signed webhooks instead of silence.

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Visit the trust portal

Join the teams shipping on Zernio. Social, messaging and ads in one API.

Start for free Quickstart
Zernio
© 2026 Zernio
Zernio Technologies S.L.
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