Zernio

Zernio is a REST API platform that bundles publishing, replying to, and analyzing posts across, by its own account, roughly 15 social media and messaging platforms behind a single interface. A single API call publishes text, image, video, or carousel posts across multiple channels at once, and a unified OAuth flow connects the associated accounts without needing a separate developer app for every platform. Related accounts are grouped into profiles, for example a personal brand or a company account, and the same connection also opens a unified inbox for DMs, comments, and mentions, ad boosting, and analytics.

Anyone connecting their own channels still needs an individual OAuth authorization redirect for each social account, even though no platform-specific developer app is required anymore. Access requires an API key that every request carries; according to the documentation, the request format is identical across every SDK and the raw JSON interface. Through the same connection, Zernio also provisions phone numbers for SMS, calls, and WhatsApp, including automated KYC verification, plus ad boosting across, by its own account, six ad networks (Meta, TikTok, Google, LinkedIn, Pinterest, X). Billing runs on a usage basis through a card on file rather than fixed plans or seats, the provider states every price is shown before purchase with details in per-country tables on the pricing page, and every call, message, and number appears as its own line item on the usage page.

Zernio explicitly positions itself as an API for developers and AI agents in its own homepage headline, but its features page also lists a visual content calendar with drag-and-drop, bulk CSV upload for posts, and unlimited team members for editorial collaboration. Compared with connecting individual platform APIs directly, Zernio saves the work of building and maintaining many separate integrations, at the cost of an added dependency on an intermediary provider. Anyone who only needs to connect a single platform, or needs full control over every detail setting of the respective native API, is often better served by that platform's own API directly.

Zernio is available at zernio.com, with a free entry point of two free social accounts and no credit card requirement to try it out. Regular access runs on a usage basis with a card on file, every price is shown before purchase according to the provider, with details in per-country tables on the pricing page, and every call, message, and phone number appears as its own line item on the usage page. For needs outside the standard plan, the provider states it offers individually negotiated terms on the same platform.