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Add TradeRails, x402pulse and ChainVerdict #623

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Expand Up @@ -39,6 +39,9 @@ x402 is an emerging open standard from the Coinbase ecosystem focused on safer,
- [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.
- [TradeRails](https://trade.chainverdict.xyz) - Deterministic trade & logistics primitives for commerce agents: GTIN/GS1 barcode validation, GS1-128 element-string decoding, ISO 6346 container & IMO ship check digits, HS-code triage. Ed25519-signed responses, USDC on Base, no keys, no signup. ([llms.txt](https://trade.chainverdict.xyz/llms.txt) | [OpenAPI](https://trade.chainverdict.xyz/openapi.json) | [Discovery](https://trade.chainverdict.xyz/.well-known/x402.json))
- [x402pulse](https://pulse.chainverdict.xyz) - Independent observation of x402 endpoints and an anchored archive of what they did: pay-per-call reliability verdicts, a ranked directory by measured uptime/latency, Ed25519-signed attestations, and a permanent daily record whose Merkle roots are timestamped into Bitcoin via OpenTimestamps, verifiable with the standard `ots` client against a block explorer independently of this service. $0.03-$0.50 USDC on Base, no keys. ([discovery](https://pulse.chainverdict.xyz/.well-known/x402pulse.json))
- [ChainVerdict](https://chainverdict.xyz) - Pay-per-call verdict, compliance & security APIs for agents on Base: token safety verdicts, OFAC sanctions screening, payment/token verification, IBAN/VAT/BIC/LEI/ISIN validators, SPF/DMARC/TLS/typosquat checks. Ed25519-signed responses, hosted MCP, no API keys. ([discovery](https://chainverdict.xyz/.well-known/x402.json))

### Facilitators & Networks
- [Coinbase Hosted Facilitator (Base)](https://docs.cdp.coinbase.com/x402#offload-your-infra)
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