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An API that charges for queries has always been awkward. Subscription tiers and monthly billing break down when autonomous agents make thousands of microtransactions per hour across new services. x402 is Coinbase's bet that the missing piece is a payment primitive wired directly into HTTP. The mechanism revives HTTP status code 402 “Payment Required.” When a client requests a resource, the server responds with 402 plus machine-readable payment terms: amount, asset, network, and recipient. The client pays in USDC and retries with a cryptographic payment proof in an HTTP header. The server verifies settlement on-chain and serves the resource. Coinbase released x402 in May 2025. By December, it had processed 75 million transactions worth $24 million for paid APIs and AI agents. V2 adds modularity: network-agnostic identifiers, pluggable facilitators, wallet hooks, and a “Bazaar” discovery layer. Cloudflare announced it will integrate x402 and co-launch the x402 Foundation. Google Cloud's Agent Payments Protocol uses x402 for on-chain settlement. CryptoSlate will integrate it soon. Solana and Base are the production networks, with Solana reportedly flipping Base in volume by late 2025. Facilitators as payment gateways The complexity lies in the “facilitator,” which monitors blockchain networks, verifies payments, generates signed authorizations, and exposes an HTTP interface so websites can avoid running nodes. Coinbase's hosted facilitator offers fee-free USDC payments on Base and Solana with high-throughput settlement. The protocol supports multiple independent operators, but whether that portability survives when Coinbase's facilitator is free and deeply integrated is an open question. Refunds work differently from card networks. x402 has no network-level reversal. Merchants send a compensating transfer and update the order state. Rate limiting is an application-layer feature: the 402 response encodes metering rules, and facilitators enforce per-wallet limits. That makes x402 closer to cash than reversible card payments, a feature for high-frequency API calls where chargebacks would be ruinous, but a liability for consumer flows that need buyer protection. Ecosystem gravity Cloudflare's alignment signals x402 is infrastructure, not just a Coinbase project. Integrating x402 into Cloudflare's edge compute and CDN stack enables payment requests to fit into everyday web workflows. The Foundation framing of open governance and multiple implementers positions the protocol as shared plumbing. Google Cloud's AP2 uses x402 for agent-to-agent settlement, tying it into hyperscaler AI stacks. Wallets like OneKey, Sahara, and Transak have integrated x402 as a default primitive. Case studies mention AEON settling AI-initiated payments to millions of merchants across Southeast Asia, Latin America, and Africa. Throughput is small, just $24 million over seven months, but the trajectory matters. If autonomous agents need to pay per call rather than per month, x402 becomes necessary plumbing. The bet is that embedding payments in HTTP reduces friction enough to unlock new transaction classes. Risks and control The most considerable risk is that Coinbase's CDP service is the most mature. Cloudflare and AP2 reduce protocol-level concentration, but early traffic flows through Coinbase infrastructure. Coinbase shapes adoption by deciding which chains to prioritize and how aggressively to subsidize fees. The facilitator is free today, but that rarely lasts once network effects lock in. Compliance is baked into facilitators. x402 itself is neutral, but hosted facilitators plug into KYT and sanctions screening, and political pressure concentrates on facilitator operators. Token confusion is endemic, as exchanges list speculative tokens branded “x402,” conflating the protocol with unrelated assets. The team stresses the protocol has no native token, but that message competes with listing announcements. For Solana and Base, x402 is a bet that high-throughput, low-cost chains win the agent economy. If the modal payment is $0.01 for an API call, Ethereum mainnet is out, and L2s with multi-cent fees struggle. Solana's flip of Base in volume suggests faster finality and lower gas costs, giving it a structural advantage when agents hammer APIs thousands of times per second. The constraint is that x402 solves coordination, not liquidity. An agent paying for an API call needs USDC in a hot wallet: custodying keys, managing balances, handling risk. For developers, it is manageable, but for enterprises deploying agent fleets, it becomes a compliance nightmare. The protocol makes payments manageable, but it does not ensure the surrounding infrastructure is safe. x402 is not the first attempt to wire payments into HTTP. What is different is the combination of stablecoins, cheap blockchains, and a credible use case in autonomous agents. Whether that overcomes coordination problems and regulatory friction will determine whether x402 becomes foundational plumbing or another experiment that never escapes the lab. The post What is x402? The HTTP-402 payments standard powering AI agents, explained appeared first on CryptoSlate.

In brief Fetch.ai said its AI agents had already booked restaurant reservations and paid deposits in live tests. The system used existing Visa infrastructure, issuing temporary card credentials tied to specific purchases. The company said additional review pushed the public rollout to January, with Mastercard support expected later. Decrypt’s Art, Fashion, and Entertainment Hub. Discover SCENE Autonomous AI agents have become increasingly proficient at searching and recommending shopping options, but most stop short of completing transactions. Fetch.ai said Thursday that it will roll out a payment system in 2026 designed to let AI agents execute purchases and deposits on a user’s behalf. The new feature set to launch in January addresses one of the largest barriers to wider adoption of agentic AI. While consumer-facing systems can suggest flights, hotels, or services, virtually all of the agentic systems need real-time human approval before handling payments because of security, liability, and regulatory risks. Fetch.ai founder and CEO Humayun Sheikh said the obstacle was less about access to payment rails and more about how AI systems are designed. "We’ve been working on it for at least five years, and the reason is because we’re going to see a transition from the web-based economy to an AI-first economy," Sheikh told Decrypt. "And the only way to do that is where AI agents can communicate with each other and transact with each other." amp;amp;lt;span data-mce-type="bookmark" style="width:0px;overflow:hidden;line-height:0" class="mce_SELRES_start"amp;amp;gt;amp;amp;lt;/spanamp;amp;gt;amp;amp;lt;span data-mce-type="bookmark" style="width:0px;overflow:hidden;line-height:0" class="mce_SELRES_start"amp;amp;gt;amp;amp;lt;/spanamp;amp;gt; The new payment functionality is hosted on Fetch.ai’s ASI:ONE platform and aims to allow agents to book services, place orders, and send payments even when a user is offline. The company said it is working with established financial providers instead of building proprietary infrastructure. “All of these rails matter, but having them isn’t enough if a system can only do one thing at a time internally,” he said.“That’s why ChatGPT hasn’t managed to do this. It doesn’t have a system that allows you to actually buy something from someone.” “This is a Visa system,” Sheikh said. “We’re connecting it to the agent and making sure there’s trust building, a layer of security, and a KYC element built in.” He added that while the technology is ready, the rollout was delayed to January to allow additional checks by Visa. Mastercard support, he said, is expected to follow. To address security concerns, Fetch.ai said the system relies on single-use payment credentials rather than permanent card numbers. Transactions are authorized through Visa, which issues temporary credentials limited to specific amounts and purposes. The platform supports both traditional card payments and on-chain transactions using USDC or Fetch.ai’s FET, the native token. The company said it has avoided direct bank transfers, citing the additional regulatory requirements associated with that approach. Fetch.ai has also built an identity layer into the system, requiring agents to act on behalf of identifiable users or businesses rather than operating anonymously. The design comes as retailers and platforms push back against automated shopping tools that mimic human behavior. Last month, Amazon sent a cease-and-desist letter to Perplexity, alleging that its Comet tool was disguising bots as human shoppers. Sheikh said Fetch.ai’s agents are designed to operate transparently, with persistent identities tied to specific users. “When an agent isn’t live, for example if it’s hosted on a local machine that goes offline, it has a mailbox,” Sheikh said. “When it comes back online, it checks messages, downloads them, interprets them, and takes action.” The rollout also comes amid changes inside the Artificial Superintelligence Alliance, a group Fetch.ai formed in 2024 with SingularityNET and Ocean Protocol. In October 2025, Ocean withdrew from the ASI Alliance, citing disputes over treasury control and the closure of its token bridge. Despite the turbulence, Fetch.ai said it remains focused on an owner-operated model that allows users and businesses to host and manage their own agents rather than relying on centralized platforms. “That architecture exists for people who want to run their own agents,” Sheikh said. “We give them the facility to own and operate them, with each agent representing a known user.”

Quick Breakdown Futures traders can earn up to 19% APY via SmartEarn, plus tiered rewards and trial bonuses for new and existing users. Margin and Spot trading incentives include up to 30% fee reductions, zero-interest USDC loans, and rebates capped at 20,000 USDT. HTX announces a $100M USDT Airdroplt;span style=quot;font-weight: 400;quot;gt;A cryptocurrency lt;stronggt;lt;span style=quot;color: #0000ff;quot;gt;Airdroplt;/spangt; lt;/stronggt;is a marketing tactic employed by blockchain-based enterprises in which a large number of free tokens are distributed as part of a larger promotional campaign. The user#039;s cryptocurrency wallet receives this as a straight deposit.lt;/spangt;" href="https://defi-planet.com/glossary/airdrop/" target="_blank" data-gt-translate-attributes="[{attribute:data-cmtooltip, format:html}]" tabindex="0" role="link">airdrop to support traders affected by the October 11 market liquidation. Crypto exchange HTX has launched its “Year-End Promo, offering traders a comprehensive suite of incentives across Spot, Futures, and Margin trading. The campaign is designed to help users capitalize on year-end market volatility by providing high-yield earnings, trading fee rebates, and interest-free stablecoin loans for both retail and institutional participants. HTX Year-End Promo: Triple Incentives Across Spot, Futures, and Margin Trading https://t.co/qVCURftEz3 pic.twitter.com/NBvZy91IWx — DigitalMore.co 📱ดิจิตอลมอร์ (@DigitalMoreco) December 18, 2025 Futures rewards and SmartEarn interest The promotion’s Futures Account Power-Up Challenge, running from December 12 to 22, enables users holding USDT-M assets in SmartEarn to earn up to 19% APY, with interest continuing to accrue even while holding futures positions. New traders transferring more than 1,000 USDT into Futures accounts receive a 14-day 8% APY Booster Coupon and a random Futures Trial Bonus ranging from 10 to 100 USDT. Existing users can unlock tiered rewards, including up to 10% APY Boosters and 100 USDT Futures Trial Bonuses. Participants in the Trade for Wealth Growth activity can also earn 10 USDT in HTX tokens for every 100,000 USDT in cumulative futures trading, with a cap of 200 USDT. Margin and spot trading incentives HTX’s Festive Season Margin Trading event, running through December 25, allows traders to save up to 30% on fees and access zero-interest USDC loans, reducing financing costs for strategies such as arbitrage, swing trading, and hedging. Spot traders are eligible for rebates of 10–50%, capped at 20,000 USDT in HTX tokens, from December 15 to 31. The rebate program supports both Spot Trading Bots and Margin Trading, catering to both professional and retail crypto users. The year-end campaign combines passive income opportunities, fee reductions, and trading incentives to create a holistic environment for crypto traders. By integrating interest-bearing futures, margin support, and high-ratio spot rebates, HTX aims to enable users to optimize capital and trading strategies ahead of the new year. Additionally, HTX announced a $100 million USDT airdrop to support traders affected by the massive market liquidation on October 11, which erased over $19 billion in leveraged positions, reinforcing its commitment to trader protection and platform resilience. If you would like to read more articles like this, visit DeFi Planet and follow us on Twitter, LinkedIn, Facebook, Instagram, and CoinMarketCap Community. Take control of your crypto portfolio with MARKETS PRO, DeFi Planet’s suite of analytics tools.”

The cryptocurrency landscape just welcomed a significant new player. Stablecoin issuer United Stables has officially launched its integrated United Stables stablecoin, named U, on the BNB Chain. This launch marks a strategic shift from competition to collaboration within the stablecoin ecosystem. Instead of creating another standalone asset, U aims to unify the market by integrating major existing stablecoins like USDT, USDC, and USD1 as its foundational collateral. This innovative approach directly tackles one of DeFi’s most persistent challenges: liquidity fragmentation. What Makes the United Stables Stablecoin U Different? Unlike most new stablecoin projects that compete for market share, the United Stables stablecoin takes a cooperative path. Its core mission is integration. Think of U not as a replacement, but as a unifying layer. It uses a basket of established, trusted stablecoins as its reserve. Therefore, when you hold U, you are effectively holding a diversified portfolio of the top stable assets in the market. This design inherently reduces reliance on any single issuer’s stability and spreads risk. Moreover, by building on the BNB Chain, United Stables taps into a high-speed, low-cost network with a massive existing user base, ensuring the stablecoin is accessible and practical from day one. How Does U Solve the Liquidity Fragmentation Problem? Liquidity fragmentation occurs when value is scattered across too many similar assets, making no single pool deep enough for efficient large trades. This leads to slippage and inefficiency. The United Stables stablecoin addresses this by acting as a liquidity aggregator. Here’s how it works: Unified Collateral: U is backed by a mix of USDT, USDC, and USD1, pooling their liquidity. Single Trading Pair: DEXs and protocols can list U as a primary pair, creating one deep liquidity pool instead of several shallow ones. Reduced Complexity: For users and developers, managing one integrated stablecoin is simpler than juggling multiple ones. This model could streamline the entire DeFi experience on BNB Chain and beyond, making transactions smoother and more capital-efficient for everyone. What Future Features Does United Stables Promise? The launch is just the beginning. United Stables has outlined a roadmap filled with user-centric innovations designed to push the boundaries of what a stablecoin can do. Two announced features stand out for their potential to drive mainstream adoption: Gas-Free Transfers: The team plans to implement a system where sending U does not require the user to pay network gas fees. This removes a major barrier for new users unfamiliar with crypto transaction costs. AI-Powered Autonomous Payments: Future updates may include smart, AI-driven payment streams. Imagine setting up a recurring subscription or a conditional payment that executes automatically based on predefined data triggers. These features position the United Stables stablecoin not just as a store of value, but as an active, intelligent financial tool. Why is Binance Wallet Support a Major Boost? Adoption is critical for any new digital asset. The immediate integration of the United Stables stablecoin U into Binance Wallet provides a powerful launchpad. Binance Wallet is a widely used, trusted gateway for millions into the BNB Chain ecosystem. This support means users can easily store, send, and receive U without needing to navigate complex third-party setups. It signals strong ecosystem backing and provides instant legitimacy and accessibility, significantly shortening the path from launch to real-world use. Conclusion: A Step Toward a Unified Financial Future The launch of U by United Stables represents a mature evolution in the stablecoin sector. By choosing integration over isolation, the project addresses a core infrastructural flaw in DeFi. Its presence on BNB Chain, coupled with promised features like gas-free transfers and the crucial Binance Wallet support, creates a compelling package. While the long-term success of any stablecoin depends on sustained trust, transparency, and adoption, U’s collaborative foundation offers a promising blueprint for a less fragmented and more efficient digital economy. Frequently Asked Questions (FAQs) What is the United Stables stablecoin U? U is a new stablecoin launched on BNB Chain that is uniquely backed by a basket of other major stablecoins like USDT and USDC, aiming to unify liquidity rather than compete with existing assets. How is U different from USDT or USDC? Unlike USDT or USDC, which are single-issuer stablecoins, U aggregates the value of several top stablecoins into one token. It’s designed to reduce fragmentation and provide a more diversified stable asset. On which blockchain is U available? The United Stables stablecoin U is primarily launched on the BNB Chain, known for its high transaction speed and low costs. Can I store U in Binance Wallet? Yes. Binance Wallet has already added support for the U stablecoin, allowing users to easily store and manage it alongside other assets. What does “gas-free transfers” mean? It’s a planned future feature where users may be able to send U tokens without paying the typical blockchain network fee (gas), making transactions simpler and more predictable. What are AI-powered autonomous payments? This proposed feature would use artificial intelligence to automate complex payment conditions, like releasing funds when certain real-world events occur, enabling smarter financial agreements. Found this insight into the new United Stables stablecoin helpful? Share this article with your network on Twitter or LinkedIn to discuss how integrated stablecoins could shape the future of DeFi! To learn more about the latest trends in stablecoins and decentralized finance, explore our article on key developments shaping the cryptocurrency landscape and institutional adoption. Disclaimer: The information provided is not trading advice, Bitcoinworld.co.in holds no liability for any investments made based on the information provided on this page. We strongly recommend independent research and/or consultation with a qualified professional before making any investment decisions.

Quick Breakdown Coinbase starts U.S. stock and ETF trading with 24/5 availability in one app alongside crypto. Kalshi partnership brings prediction markets for events like politics and sports, now rolling out outside the U.S. Early 2026 adds 24/7 stock perpetuals with 50x leverage, plus tokenized stocks for global reach. Coinbase targets broader finance arena Coinbase rolled out stock trading for U.S. users on December 17, 2025, at its System Upgrade event in San Francisco. Customers now trade major stocks and ETFs 24 hours a day, five days a week, with no fees and a single portfolio view that includes crypto holdings. Stock trading. Rolling out on Coinbase in the U.S. pic.twitter.com/tTcjpvVyXc — Coinbase 🛡️ (@coinbase) December 17, 2025 CEO Brian Armstrong called it a step toward an everything exchange where all assets tokenize for seamless access. Max Branzburg, head of consumer products, noted that users need just one account for stocks, crypto, and, soon, more. Leaks from tech researcher Jane Manchun Wong in November confirmed early code for stock and prediction products powered by KalshiEX LLC. Coinbase acts as custodian for Kalshi’s USDC reserves, sealed on November 13.​ Perpetuals, tokenization drive competition Prediction markets debut via Kalshi, letting users bet on economic, sports, and tech events with USDC or dollars, and on blockchain security. Non-U.S. rollout starts immediately, with U.S. access soon after. Next year brings perpetual futures for stocks outside the U.S. at up to 50x leverage, mirroring crypto derivatives. Tokenized stocks follow for round-the-clock trading, tapping trends like BlackRock’s Treasury tokens. This pits Coinbase against Robinhood amid retail trading battles. Notably, Coinbase is strategically re-entering the Indian crypto market, valued at over $5 billion, by resuming new account registrations after a 2023 suspension. Indian users can immediately trade assets like Bitcoin and Ethereum. The platform aims for complete rupee-based transactions via local partnerships by 2026. This move follows successful registration with the FIU, demonstrating Coinbase’s commitment to India’s strict regulatory environment and its efforts to gain market share. If you would like to read more articles like this, visit DeFi Planet and follow us on Twitter, LinkedIn, Facebook, Instagram, and CoinMarketCap Community. Take control of your crypto portfolio with MARKETS PRO, DeFi Planet’s suite of analytics tools.”