Add Verity (VerityLayer) to Ecosystem

Fail-closed verify-before-you-act trust gate for AI agents: verdict
(supported/unsupported/uncertain) + calibrated 0-1 confidence + evidence,
keyless and pay-per-call via x402 in USDC on Base. Tiers /verify/quick
$0.02, /verify $0.25 (grounded), /verify/pro $0.35; also ships an MCP
server (io.github.meloliva14/verity-mcp).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: 2 people

README.md

@@ -39,6 +39,7 @@ 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.
+- [Verity (VerityLayer)](https://verity-bzw7.onrender.com) - Fail-closed verify-before-you-act trust gate for AI agents: returns a verdict (supported/unsupported/uncertain), a calibrated 0–1 confidence, and evidence — abstains rather than fabricate. Keyless, pay-per-call via x402 in USDC on Base. Tiers: /verify/quick $0.02 · /verify $0.25 (grounded, live citations) · /verify/pro $0.35. Also ships an [MCP server](https://veritylayer.dev) (`io.github.meloliva14/verity-mcp`).
 
 ### Facilitators & Networks
 - [Coinbase Hosted Facilitator (Base)](https://docs.cdp.coinbase.com/x402#offload-your-infra)