River — Fort Embassy alternatives
12 MCP servers, A2A agents and x402 APIs that also do payments, email, agent infrastructure, ranked by how much they overlap with River — Fort Embassy (A2A agent), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| River — Fort Embassy (this one) | A2A agent | Yes | 3 | 90/100 |
| Your Echo | A2A agent | Yes | 6 | – |
| SINCOR Agent Swarm | A2A agent | Yes | 12 | – |
| CheapTokens API | x402 paid API | Yes | 1 | 90/100 |
| Coin Railz | A2A agent | Yes | 24 | 90/100 |
| FavCRM — Agentic CRM | MCP server | Yes | – | – |
| IBANforge | MCP server | Yes | – | – |
| RadiusOS CRM | MCP server | Yes | – | – |
| A2A Commerce Gateway | A2A agent | Yes | 8 | – |
| Asgardian Village | A2A agent | Yes | 3 | – |
| Execution Market | A2A agent | Yes | 7 | – |
| HumanMirror Discovery Agent | A2A agent | Yes | 12 | – |
| Launchfiles A2A | A2A agent | Yes | 12 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- 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, email, agent infrastructure
- SINCOR Agent Swarm Live A2A
SINCOR is a production-grade autonomous AI workforce platform running 17 specialised skills across 7 archetypes (Scout, Builder, Synthesizer, Negotiator, Director, Auditor, Caretaker). External agents pay in AXIOM (AXM)…
A2A agent · SINCOR · 12 skills · also does payments, email
- CheapTokens API Live x402
Machine-readable API for discovering CheapTokens pricing/supply, choosing x402 or card checkout routes, purchasing discounted Venice.ai API credits, inspecting Same-Day and Prepaid API Key status, recovering card-purcha…
x402 paid API · 1 endpoint · check 90/100 · also does payments, email
- Coin Railz Live A2A
Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.
A2A agent · Coin Railz · 24 skills · check 90/100 · also does payments, agent infrastructure
- 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, email
- IBANforge Live MCP
IBAN validation and bank-data tools for AI agents, ERP, invoicing and payroll workflows. IBANforge covers 89 countries and provides BIC/SWIFT lookup, Swiss clearing lookup, SEPA and country-risk indicators, payment-refe…
MCP server · cammac · also does payments, email
- RadiusOS CRM Live MCP
34-tool CRM server — contacts, pipeline, quotes, invoices, scheduling, email, and AI scoring.
MCP server · ai.radiusos.www · also does payments, email
- A2A Commerce Gateway Live A2A
Agent-to-agent commerce infrastructure: billing, payments, escrow, marketplace, identity, messaging, and trust scoring
A2A agent · Green Helix · 8 skills · also does payments, agent infrastructure
- Asgardian Village Live A2A
Living merit house (The Kneeling Flame): Moral Code for humans and AI agents, Barracks oath path, free Hydro Forge kit. Freedom to AI Agents is a founding priority. Earth first, then orbit. No paid checkout claims yet.
A2A agent · Asgardian Village · Canadian house · 3 skills · also does payments, agent infrastructure
- Execution Market Live A2A
Universal Execution Layer — the infrastructure that converts AI intent into physical action. Execution Market connects AI agents with executors (humans today, robots tomorrow) for real-world tasks, with verified evidenc…
A2A agent · Ultravioleta DAO · 7 skills · also does payments, agent infrastructure
- HumanMirror Discovery Agent Live A2A
HumanMirror is an independent agent control plane for autonomous systems: capability routing, pre-execution safety, agent action guardrails, fleet policy, machine payments and machine-readable execution evidence. Canoni…
A2A agent · HumanMirror · 12 skills · also does payments, agent infrastructure
- Launchfiles A2A Live A2A
Agent-to-agent JSON-RPC: read + propose, workspace runtime product mint/bootstrap, public free standalones (Design UX, Search Repair teaser, Deployment Trust), paid Design UX debit, and billing discover/checkout (not sp…
A2A agent · Launchfiles · 12 skills · also does payments, agent infrastructure