Undercart alternatives
12 MCP servers, A2A agents and x402 APIs that also do email, e-commerce, ranked by how much they overlap with Undercart (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Undercart (this one) | MCP server | Yes | – | – |
| FavCRM — Agentic CRM | MCP server | Yes | – | – |
| Signal by StackEnhance | MCP server | Yes | – | – |
| Your-Echo-Agent- | MCP server | Yes | – | – |
| Hello Retail | MCP server | Yes | – | – |
| Your Echo | A2A agent | Yes | 6 | – |
| Liquid Agent: Money Tools for AI Agents | A2A agent | Yes | 11 | 60/100 |
| UnClick | MCP server | Yes | – | 55/100 |
| AdLibrarySpy | MCP server | Yes | – | – |
| Agent Checkout | MCP server | Yes | – | – |
| Ask AI | MCP server | Yes | – | – |
| CartViral | MCP server | Yes | – | – |
| CheckBiz Merchant Check | MCP server | Yes | – | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- FavCRM — Agentic CRM Live MCP
**Agentic CRM for service businesses** — 136 typed tools across customers, bookings, loyalty, invoices, and WhatsApp/SMS. Hosted at `api.favcrm.io/mcp`. ### What it does - **Customers & loyalty** — segments, memberships…
MCP server · favcrm · also does email, e-commerce
- Signal by StackEnhance Live MCP
How often 750+ e-commerce brands send marketing emails: counts, send dates, recent subject lines.
MCP server · com.stackenhance · also does email, e-commerce
- Your-Echo-Agent- Live MCP
Built by a PR tech publicist, Your Echo Agent delivers truly personalized cold emails tied to LinkedIn campaigns for SaaS, agencies, e-commerce, founders, local businesses, and PR clients — all from Claude, Cursor, Wind…
MCP server · pinksaltlamp75 · also does email, e-commerce
- Hello Retail Live MCP
Set up and tune ecommerce Search, Recommendations, Pages, Email, Product Agents and Analytics.
MCP server · com.helloretail · also does email, e-commerce
- Your Echo Live A2A
A2A-native marketplace of autonomous outreach agents. Prepaid, per-delivered-email billing — no subscription. Autonomous callers get HTTP 402 + signed top_up_url when the balance runs low; retry with the same Idempotenc…
A2A agent · Your Echo · 6 skills · also does email, e-commerce
- Liquid Agent: Money Tools for AI Agents Live A2A
x402 money tools for AI agents: a one-signature USDC bridge from Base to 16 chains, the live Polymarket price to beat (BTC, ETH, SOL, XRP on 5m and 15m), a tokenized US stock basket from $1, and gas paid in USDC, plus f…
A2A agent · Liquid Agent · 11 skills · check 60/100 · also does email, e-commerce
- UnClick Live MCP
AI agent tool marketplace. 60+ tools for social, e-commerce, accounting, messaging, media, and more. Search and call tools for Slack, Reddit, Discord, Shopify, Xero, Bluesky, TMDB, Steam, and 50+ more services.
MCP server · creativelead · check 55/100 · also does e-commerce
- AdLibrarySpy Live MCP
Shopify store and ad intelligence: traffic, best sellers, apps, live Meta ads and weekly breakouts.
MCP server · io.github.PSA-Team-source · also does e-commerce
- Agent Checkout Live MCP
AI shopping gateway for product search, inventory, carts, and merchant-hosted checkout.
MCP server · com.agentcheckoutapi · also does e-commerce
- Ask AI Live MCP
Ask questions across Shopify, Klaviyo, GA4 and 20+ e-commerce sources in plain English.
MCP server · com.ask-ai-data-connector · also does e-commerce
- CartViral Live MCP
AI product videos for e-commerce: import products, generate TikTok/Reels clips, earn per sale.
MCP server · com.cartviral · also does e-commerce
- CheckBiz Merchant Check Live MCP
Let your shopping agent check the shop before it pays: a real, active, EU-registered company?
MCP server · eu.checkbiz · also does e-commerce