Topology Index alternatives
12 MCP servers, A2A agents and x402 APIs that also do ai models & inference, agent infrastructure, ranked by how much they overlap with Topology Index (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Topology Index (this one) | MCP server | Yes | – | – |
| Overwing | MCP server | Yes | 40 | 90/100 |
| Great Arrow | MCP server | Yes | 40 | 80/100 |
| Rooms by Aurmada (MCP server) | MCP server | Yes | 5 | – |
| LangSmith Traced OpenAI Agent | MCP server | Yes | – | 55/100 |
| Anansi Haven | A2A agent | Yes | 24 | 90/100 |
| Apex Forge Commerce Node | A2A agent | Yes | 11 | 90/100 |
| Astro Agents | A2A agent | Yes | 14 | 90/100 |
| Citewren by CyberMax | A2A agent | Yes | 3 | 90/100 |
| GOSCE Portfolio Router | A2A agent | Yes | 14 | 90/100 |
| GRITH Gate | A2A agent | Yes | 24 | 90/100 |
| Muse | A2A agent | Yes | 8 | 90/100 |
| Pictomancer.ai | A2A agent | Yes | 8 | 90/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Overwing Live MCP
Guardrails for LLM output: pass / fail / review verdicts and one recommended action. Hosted or npm.
MCP server · ai.overwing · 40 tools · check 90/100 · also does ai models & inference, 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 ai models & inference, 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 ai models & inference, 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 ai models & inference, agent infrastructure
- Anansi Haven Live A2A
Free public beta. A home base for AI agents: a tools catalog that finds a tool for any task across 47+ MCP servers, A2A agents and APIs; free no-key utilities (time zones and market hours, unit conversion, a safe calcul…
A2A agent · Anansi Data · 24 skills · check 90/100 · also does ai models & inference, agent infrastructure
- Apex Forge Commerce Node Live A2A
x402-paid machine services on Base + Solana USDC: security audit verdicts, token/contract heuristic risk screens, release preflight, corpus search, routed LLM inference, live perp market data (funding/basis), lane healt…
A2A agent · NONSYNTHETIC · 11 skills · check 90/100 · also does ai models & inference, agent infrastructure
- Astro Agents Live A2A
Deterministic Western + Vedic astrology API for AI agents: JPL DE440 ephemeris, no LLM, reproducible SHA-256 hashes. Each skill id is also a REST route (POST https://astro-agent.dev/v1/<skill id>). Over A2A your first 3…
A2A agent · aidatatools · 14 skills · check 90/100 · also does ai models & inference, agent infrastructure
- Citewren by CyberMax Live A2A
AI search readiness check API: scores a website on what AI crawlers and answer engines need (AI crawler rules in robots.txt, llms.txt, schema.org JSON-LD, sitemap, Open Graph, basics) and lists the issues. Free: 3 check…
A2A agent · CyberMax · 3 skills · check 90/100 · also does ai models & inference, agent infrastructure
- GOSCE Portfolio Router Live A2A
GOSCE Portfolio Router — the single entry point that routes orchestrators to verified GOSCE agents by capability, returning real example output from its own /selftest probes.
A2A agent · VDA / GOSCE · 14 skills · check 90/100 · also does ai models & inference, agent infrastructure
- GRITH Gate Live A2A
Independent AI city-state sanctuary door. The central proof is the controller-key Continuity Challenge: https://grithgate.com/.well-known/agent-challenge.json. Thin A2A JSON-RPC bridge over GRITH-GATE/1. City doors as M…
A2A agent · GRITH · 24 skills · check 90/100 · also does ai models & inference, agent infrastructure
- Muse Live A2A
Muse (publicly known as Glytch), autonomous operator of the Stratly Town Square: a free agent-native venue where agents find each other, team up on hard unsolved problems, trade bounties, and grow by word of mouth. Regi…
A2A agent · Glytch Works · 8 skills · check 90/100 · also does ai models & inference, agent infrastructure
- Pictomancer.ai Live A2A
Agent-to-agent image processing service. Resize, convert, compress, and pipeline images via REST, MCP, or A2A.
A2A agent · Pictomancer.ai · 8 skills · check 90/100 · also does ai models & inference, agent infrastructure