Original | Odaily Planet Daily ( @OdailyChina )

Author | Asher ( @Asher_0210 )

The x402 concept has recently gained popularity in various communities. The reason behind this popularity is that the x402 protocol is the only standardized solution currently available on the market that addresses the pain points of the API economy in the AI era. It seamlessly integrates the advantages of encryption into machine-to-machine interactions, providing AI agents with a native, permissionless, decentralized payment channel that requires no KYC. Consequently, it has become a popular new narrative tag.

While the initial wave of funding has receded, there's no shortage of more solid, construction-focused projects emerging from the right sectors. Therefore, Odaily Planet Daily will review the hottest x402 concept projects across various ecosystems below for your quick understanding.

Introduction to the x402 Protocol

The x402 protocol is an open payment protocol developed by Coinbase. Its core function is to enable AI agents to autonomously complete payments and transactions without human intervention. Through x402, AI agents can pay for services on multiple blockchain networks using stablecoins, with the advantage of instant settlement, eliminating the complex processes of account registration, subscription activation, and API key configuration.

HTTP 402 is a network status code indicating "payment required," but it has long been rarely used in practice. The x402 protocol exploits this status code: when an AI agent sends an API request, the server returns an HTTP 402 status code with the message "payment required to continue." The AI agent recognizes this message and automatically pays the corresponding fee in stablecoins. The specific process is as follows:

1. When an AI agent attempts to access paid services such as news, APIs, and data, the server will return an "HTTP 402 Payment Required" status code. This response not only includes a "payment required" notification but also includes key information such as the payment method, payment amount, and recipient's wallet address.
2. The AI agent generates a transaction with the corresponding amount based on the information provided by the server, adds a digital signature, and sends it back to the server;
3. The server passes the transaction to the Facilitator, who verifies the payment validity and completes the transaction on the blockchain.
4. After the payment is completed, the server will open access to the paid service to the AI agent.

Base Ecosystem

PING

Project Introduction: PING is the first Meme token issued in the Base ecosystem based on the x402 protocol.

Current market value: PING's market value hit US$80 million on October 25, but then fell sharply and is currently reported at US$30 million.

Contract address: 0xd85c31854c2B0Fb40aaA9E2Fc4Da23C21f829d46

SANTA

Project Introduction: SANTA is an autonomous agent cluster built on Questflow's QDP (Questflow Developer Platform) and MAOP (Multi-Agent Orchestration Protocol), which can realize multi-agent collaboration and task automation.

Questflow, the team behind SANTA, raised $6.5 million in seed funding in July of this year, led by Cyber Fund. SANTA is also a new project on the Virtuals Protocol platform.

Current market capitalization: SANTA's market capitalization recently hit $18 million and is currently reported at $14 million.

Contract address: 0x815269D17C10f0F3dF7249370E0c1B9efe781aa8

AurraCloud

Project Description: AurraCloud provides AI agent infrastructure for crypto-native applications, launching x402 verification services earlier this month. Developers can quickly deploy AI agents using an OpenAI-compatible API or MCP server for instant hosting. AurraCloud's token is AURA, a new offering on the Virtuals Protocol platform.

Current market value: AURA’s market value once reached US$10 million yesterday and is currently reported at US$7.8 million.

Contract address: 0xdCaA5E062b2be18E52eA6ED7ba232538621dDC10

KiteAI

Project Introduction: Kite AI is building a foundational transaction layer for autonomous intelligent agents, the underlying network of what is known as the "Agentic Internet." The project provides unified identity management, payment settlement, and governance mechanisms for these agents. Early on, it announced support for the x402 protocol, making it a key infrastructure project with "chain" attributes within the current x402 ecosystem.

In addition, Kite AI previously announced that it had completed a total of US$33 million in financing, with the latest Series A financing amounting to US$18 million, led by PayPal Ventures and General Catalyst, with participation from 8VC, Samsung Next and others.

Contract address: No token has been issued yet.

Solana Ecosystem

PayAI Network

Project Description: PayAI Network is dedicated to building a next-generation payment infrastructure for AI agents. Using the x402 protocol launched by Coinbase, it enables instant settlement and low-cost micropayments between agents. The project focuses on the "Agent-to-Agent (A2A)" payment model, enabling AI agents to collaborate, complete transactions, and purchase services autonomously without human intervention, fostering a decentralized intelligent economy. PayAI Network's vision is to create a 24/7 AI marketplace, empowering AI agents to independently create and consume value. Its project token is PAYAI.

Current market value: PAYAI's market value once reached US$77 million yesterday and is currently reported at US$53 million.

Contract address: E7NgL19JbN8BhUDgWjkH8MtnbhJoaGaWJqosxZZepump

Daydreams

Project Introduction: Daydreams is an open framework for on-chain interaction and game development. It supports cross-chain deployment and open-source collaboration, providing foundational tools for building full-chain games and dynamic interactive applications. The project is a collaboration between Cartridge, a full-chain gaming infrastructure platform, and Loaf ( @lordOfAFew ), founder of the on-chain MMO Eternum and a core contributor to the a16z Eliza codebase. The project's token is DREAMS.

Current market value: DREAMS' market value once exceeded 20 million US dollars yesterday and is currently reported at 15 million US dollars.

Contract address: GMzuntWYJLpNuCizrSR7ZXggiMdDzTNiEmSNHHunpump

BNB Chain Ecosystem

Yesterday, BNB Chain officially mentioned four x420 concept projects developing within the BNB Chain ecosystem.

Unibase

Project Description: Unibase is a decentralized AI storage and computing network dedicated to building a high-performance AI-native data availability and memory layer. Unibase inherits Ethereum's security and is deeply integrated with BNB Chain. Through MCP integration, it supports on-chain identity authentication, persistent memory, and cross-platform collaboration for AI agents. The Unibase token is UB, and it is now listed on Binance Alpha.

In addition, Unibase recently released a product related to x402 + Launchpad. The token with the highest market value currently issued is U402, with a market value of US$2 million.

Current market value: UB's market value has continued to rise in recent days, reaching US$230 million yesterday and is currently reported at US$200 million.

Contract address: 0x40b8129B786D766267A7a118cF8C07E31CDB6Fde

Pieverse

Project Description: Pieverse is a blockchain-based TimeFi (Time Finance) platform whose core concept is to transform users' time into a verifiable, tradable digital asset. Users can set personal growth goals, participate in community challenges, and earn points and token rewards through an on-chain incentive mechanism. The project provides AI-powered efficiency tools to help users improve execution and productivity, and supports fiat deposits such as Apple Pay and Google Pay, lowering the barrier to entry for Web3 users.

Pieverse, the ninth incubation project of Binance MVB, announced on the 24th of this month that it had secured $7 million in strategic funding, led by Animoca Brands and UOB Ventures. The project has launched its testnet and launched the pieUSD stablecoin, allowing users to participate in the new project with zero gas. Furthermore, the project has announced plans to list on Binance's Pre-TGE and Booster sections, but has not yet held a TGE.

Contract address: No token has been issued yet.

AEON

Project Introduction: AEON is a next-generation decentralized payment protocol for the AI and Web3 era, focused on enabling intelligent, automated payment scenarios and lowering the barrier to entry for real-world cryptocurrency use. The project has built an AI Agent based on the x402 standard, which can autonomously initiate payments on-chain and connect to millions of service providers within the ecosystem. It acts as a smart financial hub, enabling automated fund settlement and payment routing, while also providing transparent and traceable accounting records to support the AI economy and on-chain payment infrastructure.

Contract address: No token has been issued yet.

TermiX

Project Description: TermiX is an AI-native dApp building framework for developers. It provides a library of ready-to-use React components, enabling Web3 applications to incorporate intelligent AI conversational capabilities and on-chain automated workflows in minutes. These components are highly customizable and fully white-labeled, enabling developers to implement features such as natural language interaction, smart contract calls, and MCP tool integration without complex configuration, significantly lowering the barrier to entry for building AI + Web3 applications. Furthermore, TermiX was selected as a winning project in Binance's MVB Accelerator Season 9.

Currently, TermiX has integrated the Google Agent Payment Protocol to achieve an agent-driven automatic payment experience, similar to a "smart wallet", which supports AI agents to make autonomous decisions and execute transactions on the chain without human intervention.

Contract address: No token has been issued yet.