x402 PriceX402

What is x402 (X402)?

This article covers two different things that share the name x402: the x402 token (X402), a BEP20 meme token on BNB Smart Chain, and the x402 protocol, an open internet-native payment standard originally built by Coinbase. The two are not the same asset, and the protocol's adoption metrics do not imply value accrual to the token. The x402 protocol is built on top of the HTTP 402 "Payment Required" status code. Described as "the internet's payment standard," it enables instant stablecoin micropayments over HTTP for APIs, data, and digital services. The protocol revives a dormant status code so that servers can request payment and AI agents can settle it inline, without accounts, subscriptions, or checkout flows for each call. x402 is blockchain-agnostic and supports all EVM-compatible chains, Solana, and more, with stablecoin payments as the primary use case. The X402 token has a circulating supply of 0 and a total supply of 402,000,000,000,000,000 (402 quadrillion). The protocol is in an active growth phase, having processed millions of transactions and with the protocol now governed by the Linux Foundation.

Key Specifications & Tokenomics

• Name: x402
• Ticker/Symbol: X402
• Chain: BNB Smart Chain (BEP20)
• Contract Address: 0x1e8e4145506e74996f32b61de2f7f4ec60f2d102
• Block Explorer: https://bscscan.com/token/0x1e8e4145506e74996f32b61de2f7f4ec60f2d102
• Launch Date: 2025-10-26
• Consensus: Blockchain-agnostic; supports EVM-compatible chains and Solana
• Smart Contracts: Supports all EVM-compatible chains and Solana
• Category: Payment Protocol, Internet-Native Payments, Agentic Payments
• Circulating Supply: 0
• Total Supply: 402,000,000,000,000,000 (402 quadrillion)
• Max Supply: 402,000,000,000,000,000
• Token Website: https://x402moon.xyz/
• Protocol Website: https://x402.org/
• Whitepaper: https://x402.org/wp-content/uploads/sites/10/2026/06/x402-whitepaper.pdf
• Documentation: https://docs.x402.org/

Who created x402?

x402 launched in May 2025, developed by the Coinbase Development Platform team. The protocol was initially developed by Coinbase, Cloudflare, and Stripe. On September 23, 2025, Cloudflare announced a partnership with Coinbase to create the x402 Foundation. On April 2, 2026, the Linux Foundation formally launched the x402 Foundation at the MCP Dev Summit North America, taking on the protocol as a contribution from Coinbase. The Foundation launched with initial support from 22 organizations spanning payment networks, cloud providers, and blockchain infrastructure. Jim Zemlin of the Linux Foundation is referenced in relation to the launch. The protocol is now developed under open, vendor-neutral governance: the x402 Foundation, launched under the Linux Foundation on April 2, 2026, has a Governing Board for marketing, business oversight and budget, and a Technical Steering Committee (TSC) for technical decisions.

How does x402 work?

Coinbase authored the x402 transaction flow to help machines pay directly for resources over HTTP. The process follows four steps. First, a client attempts to access a resource gated by x402, and the server responds with status code 402 Payment Required, including payment instructions such as the amount and recipient. Second, the client requests the x402-gated resource with the payment authorization header. Third, the payment facilitator verifies the client's payment payload and settles the transaction. Fourth, the server responds with the requested resource along with a payment response header confirming the payment outcome. This flow creates programmatic access to resources across the internet without accounts, subscriptions, or API keys. In x402 V2, the exchange is standardized around three Base64-encoded JSON headers: PAYMENT-REQUIRED, PAYMENT-SIGNATURE, and PAYMENT-RESPONSE. The protocol supports multiple settlement schemes including exact, upto, and batch-settlement. The protocol is open-source under the Apache-2.0 license, with reference implementations in TypeScript, Python and Go; nothing prevents implementation in other languages such as Rust or Java. Supported networks include Base (eip155:8453) and Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp), each supporting any ERC-20 or SPL/Token-2022 token respectively; gas is paid onchain, and many facilitators charge zero facilitator fees.

What makes x402 unique and valuable?

x402 addresses a long-standing gap in the web stack by making native payments possible between clients and servers through a universal standard for monetizing digital resources. Its key technical properties include being HTTP-native with no additional communication required, no protocol fees for both customer and merchant, no wait since money moves at the speed of the internet, no friction with no accounts or personal information needed, no centralization allowing anyone to build on or extend it, and no restrictions as a neutral standard not tied to any specific network. Its design goals include no protocol fees, no accounts, and no network lock-in. Note that x402 does not natively support fiat off-ramps or credit-card deposits, and exact-scheme payments are irreversible once executed. The protocol is production-ready, has processed millions of transactions, and is open-source. The protocol is open-source under the Apache-2.0 license; its security model relies on every PaymentPayload being signed by the buyer and settled directly onchain, so a tampering facilitator would fail signature checks. It enables agentic payments at scale, empowering AI agents and web services to autonomously pay for API access, data, and digital services.

What is x402 used for?

x402 enables instant, low-cost payments for digital services. It is designed for API monetization, agentic commerce, paywalled content, and any scenario where traditional payment methods are too slow or expensive. Real-world use cases include AI agents autonomously paying for API access, data feeds, and compute resources; developer APIs monetized per-request without subscription complexity; content creators charging micropayments for articles, images, or model inference; and agent marketplaces where autonomous buyers and sellers transact 24/7. Cloudflare's examples include an assistant purchasing accessories from multiple merchants, an AI agent paying per browser rendering session instead of a monthly subscription, and an autonomous stock trader making micropayments for real-time data feeds. CMC Crypto Data is also offered via the x402 Protocol, providing instant pay-per-request access to crypto data with no API keys or subscriptions.

How Is the x402 ecosystem developing?

The x402 ecosystem is expanding rapidly. Major platforms supporting x402 include Cloudflare, Google, and Vercel. Cloudflare shipped features allowing developers to use x402 in the Agents SDK and MCP integrations, and proposed a new deferred payment scheme. Coinbase launched Agent.market on April 21, 2026, an AI agent app store built on its x402 payment protocol. Circle provides documentation on x402 and is a Premier Member of the x402 Foundation. Solana provides x402 documentation and ecosystem resources, and the Solana Foundation is an initial supporter. Foundation members include Adyen, Amazon Web Services, American Express, Circle, Cloudflare, Fiserv, Google, Mastercard, Microsoft, Polygon Labs, Shopify, Solana Foundation, Stripe, and Visa. According to the x402 Protocol overview, the protocol has processed more than 75 million transactions.

How to mine x402?

x402 does not use a traditional mining mechanism. The protocol is blockchain-agnostic and operates as a payment standard rather than a mineable cryptocurrency network. Payments are settled using stablecoins such as USDC on supported networks including Base, Solana, Polygon, and Avalanche. Facilitators verify and execute signed payloads but do not hold buyer funds or act as custodians. Settlement schemes include exact and upto, which typically settle immediately, and batch-settlement, which lets buyers deposit funds into onchain escrow once, sign off-chain vouchers for each request, and let sellers redeem many vouchers in a single onchain transaction later. There is no staking or mining process for the X402 token itself. The x402 protocol has no token requirement — payments are made in stablecoins such as USDC, and no Coinbase products are needed to use it. The X402 token is a separate BEP20 meme token on BNB Smart Chain and is not required to use the protocol.

How to keep your x402 Coin safe?

Keeping your X402 tokens safe requires standard cryptocurrency security practices. Use reputable wallets that support the networks on which x402 operates, including EVM-compatible chains and Solana. Since x402 enables payments without accounts or API keys, users should carefully verify payment instructions returned in HTTP 402 responses before signing any payment payload. Store private keys securely and never share them. Be cautious of phishing attempts that mimic x402 payment flows. When using facilitators, remember that they verify and execute signed payloads but do not hold buyer funds or act as custodians. Always check the payment requirements returned in the 402 Payment Required response. For long-term storage, consider hardware wallets. The protocol is open-source, but individual user security depends on proper key management and transaction verification. The X402 token's price and trading activity fluctuate with the market, and holding it carries risks including price volatility, regulatory policy changes, and technical risks.