Review the trade before it settles.
Collar sits in front of autonomous trading agents on Robinhood Chain and evaluates proposed trades against your risk policy — deterministically, outside the agent's runtime.
Curious what Collar says about newly created pools? See Collar Watch →
Collar launches 20 November, 3 PM ET
Announcements go out first on @collarguardrail.
Access tiers
Your wallet's Collar balance determines your tier. x402-paid access unlocks Tier 2 limits without holding COLR.
Connect your Web3 wallet, sign the EIP-191 challenge & obtain a JWT token.
Signing costs no gas and requests no fund transfer or spending approval — it only proves you own the wallet.
Try a trade
Note: the rate limit counts all attempts in the last 60 seconds — back-to-back trades can affect each other. This is real behavior, not a bug.
For developers & agents
Machine-readable discovery surface for MCP clients, A2A agents, and LLM crawlers. Everything here is public and versioned.
Collar Watch
Verdict snapshot on new pools, reproducible from public data.
/scorecard LIVEStatus
Uptime, dependency health, known issues.
/status LIVEMetrics
Aggregate usage counters.
/metrics.html LIVELatency
p50/p95/p99 per endpoint and MCP tool.
/latency.html DOCSMethodology
How the 0–100 risk score is computed.
/methodology.html MCPMCP server card
Tool schemas, rate limits, x402 config.
/mcp-card.html A2AAgent card
A2A skills and security schemes.
/agent-card.html AGENTSllms.txt
API contract for LLM-based agents.
/llms.txt PAYMENTx402 access
Paid endpoint, network, price.
/metrics.html