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 - [Strale](https://strale.dev) - Business data & compliance APIs for AI agents. 250+ quality-scored capabilities (company data, VAT validation, sanctions screening, KYB) across 27 countries with x402 payment support. [MCP server](https://www.npmjs.com/package/strale-mcp) available.
 - [Hedera and the x402 Payment Standard](https://hedera.com/blog/hedera-and-the-x402-payment-standard/) - Hedera ecosystem overview of x402-style programmable payments for applications and AI agents.
 - [CardZero](https://cardzero.ai) - Smart-contract wallet (ERC-4337) for AI agents on Base mainnet, USDC. Buyer-side x402 support via `POST /v1/x402/pay`. Owner-controlled spending rules (per-tx limit, daily cap, whitelist, freeze) enforced on-chain. Also runs first known production deployment of ERC-8004 + ERC-8183.
+- [BYTE Library](https://www.payperbyte.io) - Per-byte USDC data feeds & oracles for AI agents on Arbitrum. 21 first-party feeds (crypto markets, DeFi yields, weather, earthquakes, threat-intel, US legal statutes, fact oracles) — pay-per-call via x402 or subscribe on-chain, every settlement an EIP-712 PayloadAttestation receipt. 14-tool [MCP server](https://www.npmjs.com/package/byte-mcp-server) available; discovery manifests at `/.well-known/x402.json` + `/openapi.json`. ([Catalog](https://x402.payperbyte.io/feeds))
 
 ### Facilitators & Networks
 - [Coinbase Hosted Facilitator (Base)](https://docs.cdp.coinbase.com/x402#offload-your-infra)