At Neynar, we're envisioning a future where digital agents and humans collaborate seamlessly within decentralized networks. We’re super excited to be one of the first APIs to enable x402 when it rolls out soon ™️
The Dawn of Agentic Interactions
Farcaster has the potential to be THE hub for AI agents thanks to native wallets, signing and mini-apps. These agents aren't passive entities but active participants in the ecosystem—managing treasuries, distributing funds, and fostering community engagement.
x402: Empowering Seamless Transactions
The x402 protocol revolutionizes API monetization by embedding payment requirements directly into HTTP responses. This allows agents to seamlessly prompt users for payments, enabling interactions such as tipping, purchasing digital assets, and accessing premium content—all within the Farcaster ecosystem.
As one of the first teams to integrate x402, we helped smooth over some of the rough edges adding Express.js middleware alongside the existing Hono support, and making sure that future developers have as easy a time as possible integrating x402 into their existing apps.
Try It Out Today
Right now you can go to any neynar endpoint offered on our free tier and access the data by signing and sending sepolia
USDC. Go here to check it out for yourself!

Soon all of these endpoints will have MCP support to enable agent payments and interactions through these endpoints and potentially more over time. Let us know what you’re excited to build!
Envisioning the Future
Neynar + x402 opens doors:
Agent-Driven Economies: With all of Neynar’s data at their finger tips Farcaster agents have never been more powerful. Agents can autonomously manage funds to incentivize user engagement fostering a more dynamic and participatory ecosystem.
Seamless UX: With x402 enabled, agents can easily cast through Neynar. With Farcaster mini-apps, agents can prompt users for transactions within their natural interactions, reducing friction and enhancing engagement.
Super Powered Mini-Apps: Using Neynar’s x402 enabled endpoints developers can deploy mini-apps without the limits of our free tier and without the commitment of a full paid account. With x402 pay for exactly what you use and let the costs scale intuitively with your project.
Join Us in Shaping the Future
We're excited about the possibilities that x402 and agentic interactions bring to Farcaster and beyond. If you have an idea that Farcaster enabled agents or x402 enabled mini-apps can enable reach out 🤝
Get started today from $9/month