Block, the payments company led by Jack Dorsey, has added Bitcoin Lightning support to the x402 payment standard and joined the x402 Foundation, according to News.bitcoin. The company announced the Lightning contribution on September 24, 2026, a day after a repository commit recorded the change.
The standard revives HTTP status code 402, historically reserved for “Payment Required” and never widely adopted. Coinbase built x402 around that dormant code before handing the protocol to the Linux Foundation. Crypto.news reported that the September 23 commit records “exact Lightning on lnbtc,” tying the addition to a specific network identifier in the public repository.
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Key facts
- Block integrated Bitcoin Lightning into x402 and disclosed the work on September 24, 2026, per News.bitcoin; a September 23 commit documented the change first.
- Circle’s USDC stablecoin accounted for 99.3% of x402 payment volume in the second quarter, per Crypto.news.
- x402 handled 75.41 million transactions and $24.24 million in volume over a recent 30-day window, with 94,060 buyers and 22,000 sellers, according to the Foundation’s figures cited by Crypto.news.
- Steve Lee, who heads Block’s Spiral bitcoin development unit, said agents “will make billions of small payments” and need rails that are instant, low-cost and open.
- Block has published no timeline for integrating Lightning-based x402 payments into Square, Cash App or Bitkey.
A bitcoin option inside a stablecoin-heavy protocol
The mechanics rely on the 402 response: a server returns payment instructions, the client settles and retries with a payment receipt. Block’s contribution adds a Bitcoin layer-two bearer asset to a handshake that has run almost entirely on dollar-pegged tokens. Crypto.news noted that the 75.41 million transactions and $24.24 million volume cover x402 as a whole, not Lightning specifically, and that Block published no merchant deployments or AI-agent usage figures tied to its implementation.
Cointelegraph reported that Block framed Lightning as suited to the low-cost, high-volume payments agentic commerce will depend on, and placed the company alongside Google, Microsoft, Amazon Web Services, Coinbase and the Solana Foundation as x402 backers. Crypto.news, however, cautioned that the Linux Foundation’s April launch notice listed Microsoft only among organizations expressing initial intent, and that Microsoft was not on the named 40-member operational roster published in July. The outlets also split on timing details, with Cointelegraph dating the public announcement to Thursday and Crypto.news describing a September 24 statement preceded by the repository commit.
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Why it matters
A protocol designed to stay currency-agnostic had drifted toward a single corporate token, which makes Block’s contribution a test of whether x402 can genuinely support multiple settlement layers. For developers building agent payments, it adds a non-stablecoin option that settles in milliseconds off-chain, avoiding base-chain congestion. It also pulls Bitcoin into a standards body whose membership skews toward card networks, cloud providers and exchanges, giving Lightning a seat at a table those firms are watching.
What to watch
Crypto.news reported that the Python implementation for Lightning on x402 still needs to survive real-node testing before going live. Block’s roadmap calls for continued Lightning contributions and participation in x402 Foundation working groups, so the practical question is whether that code clears testing and whether developers route real agent traffic through it.
Nothing here is financial advice, and cryptocurrency markets remain volatile and uncertain.
Reported by news.bitcoin.com.
Sources: Bitcoin.com News, Crypto.news, Cointelegraph
