Solana X402 Hackathon
Join developers hacking on the frontier of internet payments and compete for up to $135,000 in prizes
The opportunity to build on the agent economy is here
This remote hackathon is geared to building new innovative tools, apps, infra, and agents on x402. Join the community to find teams and build with other developers on Solana worldwide
Join the communityEvent Timeline
| Phase | Date |
|---|---|
| Start | 10/28/25 |
| Building Period | 10/28/25 - 11/11/25 |
| Submission Deadline | 11/11/25 |
| Winners Announced | 11/17/25 |
Get Started
What are we looking for?
Build open-source infrastructure and applications that advance the agent economy on Solana. Create tools that enable AI agents to transact autonomously, develop innovative payment solutions, or build practical agent applications. This is your opportunity to define how autonomous agents interact with the digital economy.
Submission Requirements
- All code must be open sourced
- Projects must integrate x402 protocol or related agent infrastructure with Solana
- All programs must be deployed to Solana devnet or mainnet
- Submit a demo video (maximum 3 minutes) showcasing your project
- Include documentation on how to run and use your project
Hackathon Tracks
Compete in one of five categories with prizes up to $20,000.
Best Trustless Agent
Build Autonomous agents with identity, reputation, and validation systems.
Best x402 API Integration
Create Agent-to-agent payments and micropayments with x402.
Best MCP Server
Develop Model Context Protocol servers connecting AI agents to payments.
Best x402 Dev Tool
Create SDKs, libraries, frameworks, or infrastructure accelerate x402 development on Solana.
Best x402 Agent Application
Build practical AI agent applications that use x402 for autonomous payments. Supported by Gradient Network.
Supported by the best builders in x402
Sponsor Bounties
Additional prizes from our x402 ecosystem partners
Best Use of CASH
Build an x402 agent that uses Phantom CASH for payments
Best Use of Visa TAP
Create an agent that interfaces with Visa's Trusted Agent Protocol
Best Multi-Protocol Agent
use x402, ATXP, and ACP or AP2 in an end-to-end agent flow
Best Usage of CDP Embedded Wallets
Using CDP Embedded Wallets (SVM) build demand-side agents that autonomously discover, reason over, and pay for chained tool calls
Parallax Eco Track
Best agent built on top of Gradient Parallax
Machine Economy Prize
Use OM1 to build autonomous agents with the x402 protocol
Dark Research Prize
Built on top of Dark Research open source bounties like Mallory
Best Use of Switchboard
Build with data from Switchboard's permissionless oracle protocol
Best x402 Integration with Old Faithful
Automate sustainable access to all of Solana's history by integrating x402 payments into Old Faithful RPC
Best AgentPay Demo
Create AI Agents or services that autonomously pay for APIs, LLM tokens, or data via Solana USDC + HTTP-402 micropayments
Resources for Building
Everything you need to build on x402 and Solana
Getting Started
Learn about x402
Understand the x402 protocol and what it enables for developers and agents.
Add x402 to your project
Easily integrate with x402 on your API and applications.
Launch a x402 Facilitator
Go live with x402 by launching your own facilitator on Solana.
Ship with a x402 template
Get started quickly on Solana with a x402 template.