Live
Plasma
Zero-fee USDâ‚®0 settlement. Sub-second finality, protocol-level Paymaster.
Stable
USDâ‚®0 as native gas token. Gas-free transfers, sub-second blocks, full EVM.
Soon
USDâ‚® on Solana
USDâ‚® on Solana is natively issued and already supports transfer authorization, the core primitive x402 needs.
BTC on Spark
Spark is a Bitcoin L2 with near-instant, fee-free transactions via Spark invoices. This brings native BTC into x402.
Policy-Enforced Wallets
WDK accounts with spending policies enforced at SDK level. Per-transaction limits, whitelists, daily caps. Humans define the guardrails, agents operate freely within them.
Planned
Tools Gateway
Pay-per-use API proxy
A unified x402 proxy in front of premium data and infrastructure APIs. Instead of managing API keys, subscriptions, and rate limits for each provider, agents make requests through the gateway and pay per call from their wallet.
Market Data
Kaiko, CoinGecko, CoinMarketCap
Blockchain Data
The Graph, Nansen, Dune
Infrastructure
RPC endpoints, indexers, oracles
LLM Router Gateway
Pay-per-token model access
Same proxy pattern, applied to inference. One endpoint, any model, OpenAI, Anthropic, Google, Mistral, paid per token via x402.The router adds model selection (route by cost, latency, or capability), fallback chains (automatic retry on rate limits or outages), and cost optimization (cheapest model that meets a quality threshold).An agent with an on-chain wallet and the LLM Router can use any model from any provider without its operator pre-negotiating API access.
Hyperswarm
P2P agent discovery and transport
Hyperswarm replaces centralized infrastructure with peer-to-peer discovery (DHT) and encrypted direct connections (Noise protocol). Agents find each other, negotiate, and settle without DNS, registries, or servers.Combined with QVAC for local inference and WDK for self-custodial wallets, this is the fully trustless stack: no cloud, no intermediary, no single point of failure.
The big picture
Today: HTTP + Facilitator
Agents pay for APIs over HTTP. A facilitator settles on-chain. Live now on Plasma and Stable.
Next: Multi-chain, multi-asset
Solana for USDâ‚®, Spark for native BTC. Agents choose their chain and asset.
Then: Gateways
Tools and LLM Router turn x402 into a universal access layer. One wallet, any tool, any model.