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8k4 Protocol — ERC-8004 Agent Trust Score
x402
8k4 Protocol — ERC-8004 Agent Trust Score is a paid API for AI agents from api.8k4protocol.com, paid per call via x402, $0.001/call, status down (last checked 2026-10-07).
Returns an ERC-8004 trust score, risk band, and confidence tier for a specific on-chain agent by agent ID and chain
Price / call$0.001
Success—
StatusDown
How this service works
Get an ERC-8004 trust score for a specific agent and chain
Output
A JSON object containing the agent's numeric trust score (0-100), risk band (e.g. MEDIUM), confidence tier, validator count bucket, global EIP-155 identifier, chain name, and the timestamp the score was last computed.
Example use cases
Example prompt
“What's the ERC-8004 trust score and risk band for agent ID 21480 on the Base chain — I want to know if it's safe to interact with before delegating anything.”
Technical details
Endpoint
GEThttps://api.8k4protocol.com/agents/%7Bagent_id%7D/score?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, single-agent trust score and risk classification for a specific ERC-8004 agent on a known chain, especially before delegating tasks or interacting with an unknown agent. Prefer this over the score explanation endpoint when you need only the numeric verdict, not the reasoning behind it.
Side effects
- Unknown agent_id returns 404 not found
- Unsupported chain name returns 400 bad request
- Agent has insufficient validator data, returning low confidence tier
- API key or x402 payment missing returns 402 payment required
- Rate limit exceeded returns 429 too many requests
Output
Schema · Response
{
"type": "json",
"example": {
"as_of": "2026-03-03T00:00:00+00:00",
"chain": "base",
"score": 78.4,
"agent_id": 21480,
"global_id": "eip155:8453:0x8004...:21480",
"risk_band": "MEDIUM",
"confidence_tier": "MEDIUM",
"validator_count_bucket": "10+"
}
}Tags
x402
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