MCP servers for Grok Build

The lowest current price for a product, checked live, with the typical price and links to compare.

Routes each LLM completion to the cheapest capable provider across 8 providers (BYOK).

Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit

Let your shopping agent check the shop before it pays: a real, active, EU-registered company?

Offline check-digit validation for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN. Format check only.

Check Checkfront availability and rates, and manage booking sessions, bookings, customers and notes.

Your company's marketing data from Checkgrow: knowledge, performance, campaigns and competitors.

Verify emails and review cold email campaigns, mailboxes, replies and deliverability in CheckMX.

Read-only public services, cases, resources and FAQ from Chenfeng AI.

Email inboxes for recurring agent work. Read, search, reply, draft and organize correspondence.

Live chess tournament results and up-to-date player ratings in chat.

Your household's calendar, tasks, messages and apps. Read, update, or build new apps with AI.

Many agents. One Chief. Plan, track, and manage all your AI agents in one place.

Draft, publish and manage AI prompt/how-to listings on Chiemem (Japan): images, files, sales.

31 pay-per-call APIs for AI agents: SEO, open data, video planning (EN/DE). USDC on Base via x402.

Look up medical devices in China by UDI, product name, registrant, registration number or category.

China news (EN/ZH), Weibo 微博/Baidu 百度/Zhihu 知乎 hot lists and deletion watch from public data.

China-focused validation tools: ID card, bank card, phone, plate, USCC, VIN, lunar calendar & more

Read-only ChinaAPI model catalogue, price snapshot, cost estimates and request recipes.

Can Chinese websites be crawled, understood, and cited by Doubao/DeepSeek/Wenxin/Kimi? This includes citation auditing, source pool…

Chipp: conversations, messages, usage and engagement analytics, end users and their memories, and.