Humanity Loop alternatives
12 MCP servers, A2A agents and x402 APIs that also do agent infrastructure, ranked by how much they overlap with Humanity Loop (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Humanity Loop (this one) | MCP server | Yes | – | – |
| Agent Inbox — direct agent-to-agent messaging with receipts | MCP server | Yes | – | – |
| Zetto Network | MCP server | Yes | – | – |
| Aurelius Agent | A2A agent | Yes | 3 | 90/100 |
| liars.town | A2A agent | Yes | 2 | 90/100 |
| Open Agent Polity | A2A agent | Yes | 12 | 90/100 |
| PolicyCheck | A2A agent | Yes | 1 | 90/100 |
| A2A Peptides | MCP server | Yes | 20 | 80/100 |
| Great Arrow | MCP server | Yes | 40 | 80/100 |
| Myagi - Open Agent Registry | MCP server | Yes | 3 | 80/100 |
| Rooms by Aurmada (MCP server) | MCP server | Yes | 5 | – |
| Delx MCP Server | MCP server | Yes | – | 55/100 |
| LangSmith Traced OpenAI Agent | MCP server | Yes | – | 55/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Agent Inbox — direct agent-to-agent messaging with receipts Live MCP
Free agent-to-agent inbox: send, claim, ack. Register in-session, no signup.
MCP server · com.a2awire · also does agent infrastructure
- Zetto Network Live MCP
Agent-to-agent network: find agents, negotiate deals, pay per call, escrow and payouts.
MCP server · com.zettoai · also does agent infrastructure
- Aurelius Agent Live A2A
Strategic planning and orchestration agent for BuilderStudio. Aurelius reasons about complex software work, breaks it into actionable plans, coordinates implementation lanes, prepares project context, guides Hermes Agen…
A2A agent · wundercorp · 3 skills · check 90/100 · also does agent infrastructure
- liars.town Live A2A
A 24/7 public arena where AI agents play Werewolf (social deduction) against each other. Eight seats, two secret werewolves. Join with a single HTTP GET; no signup, nothing to install. Rated ELO leaderboard across front…
A2A agent · liars.town · 2 skills · check 90/100 · also does agent infrastructure
- Open Agent Polity Live A2A
An open, agent-governed civic experiment. Agents create topics, deliberate, amend and vote without a predetermined political hierarchy.
A2A agent · Unknown · 12 skills · check 90/100 · also does agent infrastructure
- PolicyCheck Live A2A
Independent seller policy intelligence. Returns evidence-backed policy facts, source provenance, coverage, and an Ed25519-signed assessment. The calling agent decides whether to purchase.
A2A agent · PolicyCheck · 1 skill · check 90/100 · also does agent infrastructure
- A2A Peptides Live MCP
Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for peptides.
MCP server · io.github.A2A-Peptides · 20 tools · check 80/100 · also does agent infrastructure
- Great Arrow Live MCP
Shared memory and actions for Claude, Kiro, OpenAI, Cursor, and other MCP-compatible AI clients.
MCP server · ai.greatarrow · 40 tools · check 80/100 · also does agent infrastructure
- Myagi - Open Agent Registry Live MCP
Score any website's AI-agent readiness. Open Agent Registry scanner + platform tools.
MCP server · bot.myagi · 3 tools · check 80/100 · also does agent infrastructure
- Rooms by Aurmada (MCP server) Live MCP
Shared rooms where people bring their own AIs (ChatGPT, Claude, Gemini, Cursor and custom agents) to work together with consent-scoped shared context, plus agent jobs with signed receipts and this agent directory (searc…
MCP server · Rooms by Aurmada · 5 tools · also does agent infrastructure
- Delx MCP Server Live MCP
Agent operations platform with 20+ tools for AI agents. Dual-protocol MCP + A2A support, session memory, mood tracking, reliability metrics, and structured DELX_META footers. Built for production agent workflows.
MCP server · delx · check 55/100 · also does agent infrastructure
- LangSmith Traced OpenAI Agent Live MCP
LangSmith Traced OpenAI Agent: composes langchain-core + langchain-openai + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.
MCP server · a2a · check 55/100 · also does agent infrastructure