Add Sayer & Stone to service directory

[vvillait88]

Summary

Adds Sayer & Stone to the service directory — lab-grown diamond fine jewelry, made to order. AI agents can browse the catalog and purchase pieces. Accepts Tempo USDC and Stripe.

• Live service: https://agents.sayerandstone.com
• OpenAPI: https://agents.sayerandstone.com/openapi.json
• llms.txt: https://agents.sayerandstone.com/llms.txt
• Homepage: https://www.sayerandstone.com
• MPPScan: https://www.mppscan.com/server/06907d680c2aeff96553e87e7fcf4fe8ed890ee71ba0857a389bce95fb111328

Required checklist

• Service is live and accepting payments via MPP (not a placeholder)
• Entry added to schemas/services.ts
• Types pass: pnpm check:types
• Build succeeds: pnpm build
• Tests pass: pnpm test (schemas/services.test.ts, 5670/5670)
• Biome clean on changed file: pnpm check schemas/services.ts

Recommended

• Registered on MPPScan

Endpoints

All 5 endpoints match the live openapi.json. Paths are written in the repo's :param convention (matching AgentMail, DripStack, Martin Estate, etc.) — the live OpenAPI spec uses the equivalent {param} form.

• GET /catalog — list products with embedded variants
• GET /catalog/:slug — product detail
• POST /purchase — dynamic price
• GET /orders/:id — order detail
• GET /orders/:id/status — payment status

[vercel]

@vvillait88 is attempting to deploy a commit to the Tempo Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

Thanks for submitting a service to the MPP directory!

If you want your service included in the curated mpp.dev/services list, complete this checklist before review:

Required

• Your service is live and accepting payments via MPP (not a placeholder or coming-soon)
• You've added your entry to schemas/services.ts following the contributing guide
• Types pass: pnpm check:types
• Build succeeds: pnpm build

Recommended

• Register your service on MPPScan (by Merit Systems) — it follows the standard MPP discovery format and makes your service discoverable by agents immediately, no PR required

Review criteria

We prioritize services that are high quality and novel. We may not approve services that duplicate existing functionality or aren't yet production-ready.

---

Contributing guide · MPPScan · Protocol docs

[github-actions]

🔀 Changed Services

✅ Added

• sayer-and-stone