Zernio is marketing infrastructure for AI agents, and its core selling point is: use a single API Key to access social media, ads, inbox, WhatsApp, SMS, and calls through one unified connection. The official description says that a single integration covers social, blogs, messaging, voice, and ads, and that it uses only official APIs; platform review, token rotation, and rate limiting are absorbed by Zernio. It provides an MCP server and supports up to 2 accounts for free. The official page says that more than 200,000 developers already use it, and that users can go from sign-up to their first post, message, report, or ad in 5 minutes.
Main capabilities
Social and content publishing: The official description says it supports 16 networks, and a single API can publish, schedule, reply to comments and direct messages, and pull analytics data. The platforms listed on the page include Instagram (Reels, Stories, direct messages), TikTok, X (posts, threads, replies), LinkedIn (personal or company page), Facebook (page, Reels, comments), Threads, YouTube (uploads, scheduling, moderation), Pinterest, Bluesky, Reddit (cross-subreddit submissions and moderation), Snapchat (Spotlight and saved stories), Discord (publishing, replying, and moderation within servers), Telegram (bots and channels), Slack, and Google Business (local posts, reviews, and replies).
Ads API: The official description says it supports 8 ad managers in total, including Meta, Google, LinkedIn, TikTok, Pinterest, X, OpenAI, and Reddit Ads, managed uniformly with one set of endpoints and one response structure; you can create campaigns, ad sets, and creatives from code without the ads manager or 8 logins; you can modify budgets, pause and resume; and you can aggregate spend and performance across ad networks. Example endpoint: POST /v1/ads/create.
Communications API: The official description says a single unified API covers WhatsApp, iMessage, SMS, and calls, and provides a unified inbox and unified billing. Through the Zernio API, you can search, purchase, and verify phone numbers in 55 countries, and choose the country for a number.
Blog API: The official description says the Blogs API can be used to publish and manage articles on WordPress and Shopify.
How to use
The official description says there are three ways to get started, all backed by the same API: write your own code with an SDK; hand it to an agent via MCP; or run it from the shell. The official description says it provides 8 SDKs across 17 platforms, as well as the raw REST API; MCP provides 496 tools over a single OAuth connection, with no installation and no self-hosting; the CLI provides 371 commands across 47 groups, with JSON output by default, making it easy for pipelines and agents to use. The MCP server address is https://mcp.zernio.com/mcp，官方称可注册并通过 OAuth login, with no need to paste a key.
Use cases
The official description says it is aimed at developers and teams who want their product or agent to reach customers, and it can be used to uniformly publish and schedule social content, uniformly manage multi-platform ads, centrally handle WhatsApp/SMS/call messages, run blogs in code, and support large-scale scenarios: a single workspace can connect more than 2,000 accounts, supports SSO authentication, and the enterprise edition offers custom pricing and a direct channel to the engineering team.
Limitations and not yet provided
The official description says it uses only official APIs, and it does not mention unofficial or reverse-engineered access methods; the number of MCP tools is 496, and the official description says they can be used with a single OAuth connection. On pricing, the page only states that up to 2 accounts are supported for free, and that the enterprise edition is custom-priced; the prices and billing details of the remaining plans are not yet provided. Whether all features are available on each platform, the specific quotas and rate-limit values, the data retention policy, compliance certifications, and so on are not yet provided in the materials.
