One API for WhatsApp: messaging, calling, and AI agents
You knew Zernio as the API for social media. Now it does WhatsApp too, the whole thing. Connect a number and you've got the entire WhatsApp Business API behind it: messaging and broadcasts, in-chat forms, calls you can route to AI agents, chatbots, group chats, and numbers in 53 countries. Whatever you need to build on WhatsApp, it's one integration. Made for developers and the agents they build: REST, SDKs, CLI, and a hosted MCP server. Official WhatsApp Business API. Zero markup on usage.
We built Zernio as a social media API. One integration, 10+ platforms, and developers could ship social features without spending months on OAuth flows and platform-specific quirks. That part worked.
But we kept getting the same question: what about WhatsApp?
Not “can you send a message”, but the whole thing. Numbers, broadcasts, calling, in-chat forms, group chats, AI agents. People were building real products on WhatsApp and the existing options were either expensive BSPs with markups on every message, or raw Meta APIs that take weeks to months to set up.
So we built it properly.
Connect a number, get the entire WhatsApp Business API behind it. Same Zernio integration developers already know. Zero markup on usage, you pay exactly what Meta charges per message sent, and Zernio monthly subscription. REST, SDKs, CLI, and a hosted MCP server if you’re building with AI agents.
We’re 7 people in Spain. Bootstrapped. We’ve been shipping one WhatsApp feature a day this week and today felt like the right moment to bring it to Product Hunt.
We’ll be in the comments all day. Happy to go deep on anything, like how number provisioning works inside Zernio, how to manage templates, or how the pricing compares to Twilio, whatever you’re curious about 🤝
About Zernio WhatsApp API on Product Hunt
“One API for WhatsApp: messaging, calling, and AI agents”
Zernio WhatsApp API launched on Product Hunt on June 19th, 2026 and earned 323 upvotes and 81 comments, earning #2 Product of the Day. You knew Zernio as the API for social media. Now it does WhatsApp too, the whole thing. Connect a number and you've got the entire WhatsApp Business API behind it: messaging and broadcasts, in-chat forms, calls you can route to AI agents, chatbots, group chats, and numbers in 53 countries. Whatever you need to build on WhatsApp, it's one integration. Made for developers and the agents they build: REST, SDKs, CLI, and a hosted MCP server. Official WhatsApp Business API. Zero markup on usage.
On the analytics side, Zernio WhatsApp API competes within Messaging, API and Developer Tools — topics that collectively have 665.7k followers on Product Hunt. The dashboard above tracks how Zernio WhatsApp API performed against the three products that launched closest to it on the same day.
Who hunted Zernio WhatsApp API?
Zernio WhatsApp API was hunted by fmerian. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
fmerian
Hey Product Hunt! I’m Miki, founder of Zernio :)
We built Zernio as a social media API. One integration, 10+ platforms, and developers could ship social features without spending months on OAuth flows and platform-specific quirks. That part worked.
But we kept getting the same question: what about WhatsApp?
Not “can you send a message”, but the whole thing. Numbers, broadcasts, calling, in-chat forms, group chats, AI agents. People were building real products on WhatsApp and the existing options were either expensive BSPs with markups on every message, or raw Meta APIs that take weeks to months to set up.
So we built it properly.
Connect a number, get the entire WhatsApp Business API behind it. Same Zernio integration developers already know. Zero markup on usage, you pay exactly what Meta charges per message sent, and Zernio monthly subscription. REST, SDKs, CLI, and a hosted MCP server if you’re building with AI agents.
We’re 7 people in Spain. Bootstrapped. We’ve been shipping one WhatsApp feature a day this week and today felt like the right moment to bring it to Product Hunt.
We’ll be in the comments all day. Happy to go deep on anything, like how number provisioning works inside Zernio, how to manage templates, or how the pricing compares to Twilio, whatever you’re curious about 🤝