Zernio
APIFor you
Zernio
APIFor you
IntroductionQuickstartBuild a PlatformSDKsCLIMCPWebhooksWorkflowsSupport AssistantGuidesSecurityGlossaryPricingBillingChangelogRefer & earn
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Build with the Zernio API.

Publish posts, run inboxes, place calls and manage ads across 31 platforms with one API.

QuickstartGet an API keyAPI reference

Choose your path

Start with the way you work.

Zernio API

For your product

Add publishing, messaging, calls and ads to your own app.

QuickstartCreate an API key, connect an account and schedule your first post in 5 calls.SDKsOfficial clients for Node.js, Python, Go, Ruby, Java, PHP, .NET and Rust.Build a platformGive each of your customers a profile and post on their behalf.

Zernio for AI and the terminal

For agents

Use Zernio from the assistant or shell you already work in.

MCP serverConnect Claude, ChatGPT, Codex, Cursor or any MCP client to the hosted server.CLILog in and schedule a post from the terminal with one command.WorkflowsRun a graph of messages, waits and conditions on DMs and comments.

Everything the API covers.

Every platform, one request shape.

Browse all 31 platforms with the endpoints and webhook events each one exposes.

Publish and schedule.

One POST /v1/posts call publishes to 16 platforms, now or on a schedule.

POST /v1/posts
platforms: [{ platform, accountId }]
scheduledFor, timezone

One inbox for DMs and comments.

Read and answer direct messages, comments and reviews through one set of endpoints.

Listen to events.

Receive a webhook when a post publishes, a message arrives or an account disconnects.

post.published
message.received
account.disconnected

Numbers, calls and SMS.

Buy or port in a phone number, then turn on calls, SMS and WhatsApp on it.

Ads across networks.

Create campaigns, boost posts and read ad metrics on every ad platform Zernio connects.

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Quickstart

Create an API key and make your first calls to the Zernio API. Pick what you are building and run one script, to schedule a post, send a WhatsApp message, reply to a DM or create an ad campaign.