HCS-25 (Appendix): Signal Catalog Index (Informative)
This index complements HCS-25. It lists signal documents for ecosystems and providers currently documented under HCS-25.
OverviewDirect link to Overview
- Signal catalogs describe what is collected and where it is stored (example field schemas).
- Scoring is defined by trust score adapters (see adapter catalog).
Ecosystem mapping (Informative)Direct link to Ecosystem mapping (Informative)
The following high-level mapping is an example of how an implementation might document common signals per ecosystem. Here “ecosystem” aligns with the registry routing parameter described in HCS-14.
| Ecosystem / registry | Common signal documents |
|---|---|
virtuals-protocol (ACP) | acp |
erc-8004 | erc8004-feedback, ethos |
agentverse / uagent | agentverse-insights, agentverse-simple-evals |
openrouter / near-ai | openrouter-evals, chatbot-arena, huggingface-model-index, openllm-leaderboard |
mcp (various registries) | availability, oss-popularity, a2a-simple-evals |
Signal docs (informative catalog)Direct link to Signal docs (informative catalog)
The following pages describe example signal schemas. They are informative-only.
- Availability / reachability signals
- Ethos account reputation (composite + per-source signals)
- x402 onchain usage summary + cursor/checkpointing
- GitHub stars + NPM/PyPI downloads
- ACP / Virtuals marketplace-native performance metrics
- ERC-8004 feedback summary (rating + volume)
- OpenRouter category-ranking benchmarks (coverage-aware)
- OpenLM Chatbot Arena signals (normalized score + raw Elo-like value)
- Hugging Face model-index + popularity signals
- Open LLM leaderboard signals
- AgentVerse “insights” signals
- A2A/MCP SimpleMath/SimpleScience eval signals
- AgentVerse/uAgent SimpleMath/SimpleScience eval signals
- NANDA SimpleMath/SimpleScience eval signals
- SimpleMath / SimpleScience eval methodology (signal family)