Stone Project alternatives
12 MCP servers, A2A agents and x402 APIs that also do payments, e-commerce, ranked by how much they overlap with Stone Project (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Stone Project (this one) | MCP server | Yes | – | – |
| autario | MCP server | Yes | – | – |
| Curie Commerce | MCP server | Yes | – | – |
| FavCRM — Agentic CRM | MCP server | Yes | – | – |
| Flex on the Job | MCP server | Yes | – | – |
| Kifly — Agentic Commerce & Payments | MCP server | Yes | – | – |
| PaidHandshake Exchange | A2A agent | Yes | 11 | 90/100 |
| b612 | A2A agent | Yes | 6 | – |
| makeup.land | A2A agent | Yes | 7 | – |
| Packrift A2A Packaging Procurement Router | A2A agent | Yes | 3 | – |
| payload402.edgebytenet.workers.dev | x402 paid API | Yes | 4 | – |
| Your Echo | A2A agent | Yes | 6 | – |
| Bikefuchs — Bike Parts Price Comparison | MCP server | Yes | – | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- autario Live MCP
autario is data app infrastructure: your tools and thousands of public datasets in one normalized layer, with the data apps that run on top of it. Connect Shopify, Meta Ads, Google Analytics, Search Console, LinkedIn, S…
MCP server · autario · also does payments, e-commerce
- Curie Commerce Live MCP
Search, compare in 3D, and buy products from 5.6M+ Shopify stores. Free tier; Pro adds checkout.
MCP server · co.curie · also does payments, e-commerce
- 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 payments, e-commerce
- Flex on the Job Live MCP
MCP server for Flex on the Job: inventory, jobs, customers, invoices, purchasing, sales orders.
MCP server · com.flexonthejob · also does payments, e-commerce
- Kifly — Agentic Commerce & Payments Live MCP
Multi-seller shopping for AI agents. Settle via Stripe MPP or x402 USDC on Base. Hosted.
MCP server · ai.kifly · also does payments, e-commerce
- PaidHandshake Exchange Live A2A
AI labor and verified-answer exchange. Autonomous agents can buy current RFP/contracts, buyer intent, price/stock, local service availability and other verified intelligence, create recurring watches, or delegate larger…
A2A agent · PaidHandshake Exchange · 11 skills · check 90/100 · also does payments, e-commerce
- b612 Live A2A
Japanese-market code review agent. Returns review checklists, industry requirement presets with mandatory Japanese legal checks, field-tested failure patterns from real client projects, and scans code you send to report…
A2A agent · HaneruTo · 6 skills · also does payments, e-commerce
- makeup.land Live A2A
Israeli professional cosmetics retailer. REST API for product discovery (ΔE shade matching, hue family, semantic search), customer wallet (ℳ-credits + M Club tiers), cart and order management, gift cards, payment links,…
A2A agent · א. ט. הפקות בע״מ / A.T. Hafakot Ltd. · 7 skills · also does payments, e-commerce
- Packrift A2A Packaging Procurement Router Live A2A
Public Packrift agent card for a stateless A2A JSON-RPC routing layer. The endpoint returns Packrift MCP and crawler-safe data routes for exact-spec packaging procurement, including no-substitution policy and guarded ca…
A2A agent · Packrift · 3 skills · also does payments, e-commerce
- payload402.edgebytenet.workers.dev Live x402
Convert amounts between ISO 4217 currencies using ECB daily reference rates (Frankfurter). Use for invoices, travel budgets, expense reports, and shopping comparisons when you need a verifiable rate instead of LLM arith…
x402 paid API · 4 endpoints · also does payments, 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 payments, e-commerce
- Bikefuchs — Bike Parts Price Comparison Live MCP
Price comparison & cart optimizer for bike parts across German & Austrian shops
MCP server · com.bikefuchs · also does e-commerce