- Jack Dorsey’s Block has become a member of the x402 Foundation, integrating Bitcoin Lightning support into the payment protocol.
- This integration facilitates rapid, inexpensive transactions between web services—such as APIs and data—and autonomous AI agents.
Led by Jack Dorsey, the payments firm Block has partnered with the x402 Foundation, incorporating Bitcoin Lightning Network support into the open payment standard as part of its ongoing development of machine-to-machine transactions.
Making the announcement on September 24, Block highlighted Lightning as an ideal fit for the rapid, micro-transactions anticipated in “agentic commerce.” By integrating Bitcoin Lightning, the company adds another settlement method to x402, an open standard enabling software programs and web services to transact via standard HTTP requests.
Block has joined the x402 Foundation, an open standard for agentic payments, to help build the rails that will let people, businesses, and agents pay and get paid.
We’ve also contributed Bitcoin Lightning payments, which is purpose-built for the instant, low-cost, high-volume…
— Block (@blocks) September 24, 2026
Bitcoin Lightning Integrates With x402 Payment Network
Operating via the HTTP 402 “Payment Required” status code, x402 processes transactions by having a service demand payment when an AI agent requests access to a restricted API, dataset, or digital resource. Following payment, the agent repeats the request equipped with cryptographic proof of purchase. Network-wide metrics on the x402 website indicate 75.41 million transactions totaling $24.24 million over the prior 30 days, though these figures encompass the entire x402 ecosystem rather than exclusively reflecting Bitcoin or Lightning activity.
Block designed its Lightning contribution to handle high-frequency, low-value payments efficiently. Steve Lee, who leads Block’s Spiral Bitcoin development initiative, noted that integrating Lightning into x402 marks progress toward establishing Bitcoin as everyday currency for individuals and their digital agents.
Public code repositories already reflect this technical integration, highlighted by a September 23 commit introducing the specification for “exact Lightning on lnbtc.” Nonetheless, the implementation remains under active development, with reports noting that the Python version still requires thorough review and real-node testing.
Operating under the Linux Foundation, the x402 Foundation ensures neutral governance for the payment protocol. According to the Linux Foundation, the initiative launched in July with 40 organizational members spanning cloud infrastructure, technology, and traditional payments.
Block’s inclusion offers x402 an alternative Bitcoin settlement pathway alongside traditional rails and stablecoins. Beyond this partnership, Block continues to build out machine commerce infrastructure through projects like the open-source Goose AI agent and its involvement with the Universal Commerce Protocol.
At this stage, the integration functions primarily as protocol-level infrastructure, laying the groundwork for Lightning transactions within x402. Widespread adoption across web services and AI agents will ultimately rely on ongoing testing and developer implementation.
