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Add swornly — per-call verification oracles + Markdown→PDF (Base Sepolia) #458

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Add swornly — per-call verification oracles + Markdown→PDF (Base Sepolia) #458

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Expand Up @@ -361,6 +361,7 @@ Full working examples and templates.
- [cipher-gas-oracle](https://cipher-gas-oracle.vercel.app) - x402-gated multi-chain gas oracle. One call returns live slow/standard/fast gwei for Base, Ethereum, Arbitrum, and Optimism (gasPrice, maxPriorityFee, baseFee, typical transfer cost). $0.005 USDC/Base per call.
- [Rug Scanner](https://rug-scanner-production.up.railway.app) - On-chain token risk analysis API. 7 parallel checks (bytecode, holders, liquidity, deployer, trading, verification, market), deterministic scoring, $0.05 USDC per scan via x402 on Base. ([GitHub](https://github.com/LucianoLupo/rug-scanner))
- [agent-marketplace-proxy](https://agent-marketplace-proxy.vercel.app) - x402-gated Google SERP API. `POST /search` returns top organic results from DataForSEO; agents pay $0.001 USDC per call on Base — no API key, no signup, no credit card. Single-route reference implementation showing how to wrap any commodity REST API with `x402-express` middleware in ~80 lines. ([Source](https://github.com/yayashuxue/agent-marketplace-proxy))
- [swornly](https://swornly.luci.ws) - Deterministic, signed-receipt tools for AI agents — every answer returns an HMAC-signed, re-verifiable receipt (a chat tool narrates a result; swornly signs it). `/dry-run/command` (is a shell/git command destructive + its blast radius, before the agent runs it), `/diff/mcp-schema` (breaking vs non-breaking MCP tools/list changes), `/snapshot/tool-contract` (stable tools/list fingerprint for contract pinning), `/convert` (Markdown→PDF), `/receipts/verify` (free). $0.005–$0.02 USDC per call on Base Sepolia testnet (mainnet pending). [OpenAPI](https://swornly.luci.ws/openapi.json) | [stats](https://swornly.luci.ws/stats)

### Client Examples
- [CentRake](https://centrake.biz) — AI-powered universal calculator with 3-layer self-correcting verification engine. 5-tier dynamic pricing: $0.01 basic solve, $0.05 verified solve (calculus/finance), $0.10 research solve (proofs/theorems), $0.15 AI action plans, $0.02 AI search. 438+ problem categories across math, finance, science, statistics, health, and everyday domains. Free for humans, paid for AI agents. USDC on Base. [Discovery](https://centrake.biz/api/.well-known/x402) | [Pricing](https://centrake.biz/api/x402/tiers) | [Info](https://centrake.biz/api/x402/info)
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