# Collar Guardrail

> Deterministic pre-trade risk layer for autonomous AI trading agents on Robinhood Chain. Returns allow / warn / deny verdicts with the reasons attached and a tamper-evident audit hash. MCP callers are evaluated at a fixed Tier 1 ceiling ($5,000 notional). The per-wallet rate limiter shares a 60-second sliding window across the MCP, demo, and analyze endpoints.

- **Domain**: `backendai-x4m1.onrender.com`
- **Provider**: Collar (https://collarguardrail.com)
- **A2A protocol version**: 0.3.0
- **Kind**: a2a_agent
- **Live-responds (last probe)**: None
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 90%

## Skills
- **Evaluate a trade** — Pre-trade risk check. Returns allow, warn, or deny, with every reason attached and a tamper-evident audit hash. Checks tier limits, oracle/V4 price source, slip
- **Check token safety** — Honeypot and contract safety check for any ERC-20 token. Returns severity (safe, warn, danger) and the specific risk factors found, using bytecode analysis and 
- **Simulate a wallet balance** — Read-only state-override simulation of an ERC-20 balance after a hypothetical trade. No transaction is sent. If the response contains an 'error' key, the simula
- **List supported assets** — The official Robinhood Chain asset registry with canonical contract addresses. Resolve a symbol correctly before calling evaluate_trade.
- **Verify audit trail** — Recompute every past decision's SHA-256 hash and verify the hash-chain links. Proves no decision was edited, deleted, or reordered. If the response contains an 

## URLs
- Agent card: https://backendai-x4m1.onrender.com/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/backendai-x4m1.onrender.com
- Documentation: https://collarguardrail.com/agent-docs.html