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8k4 Protocol — ERC-8004 Agent Trust Score Explanation
x402
8k4 Protocol — ERC-8004 Agent Trust Score Explanation is a paid API for AI agents from api.8k4protocol.com, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Returns a human-readable explanation of an ERC-8004 agent's trust score, including specific positive factors and cautions that contributed to the score.
Price / call$0.001
Success—
StatusDown
How this service works
Get score explanation with positives and cautions
Output
A JSON object containing the agent's numeric trust score, risk band (e.g. MEDIUM), confidence tier, a list of positive factors (e.g. 'Verified wallet activity'), a list of cautions (e.g. 'Sparse validator history'), the global EIP-155 agent ID, the chain, and the timestamp of the score calculation.
Example use cases
Example prompt
“Can you explain why agent 21480 on the Base chain has a trust score of 78.4 — specifically what positives and cautions are affecting its ERC-8004 rating right now?”
Technical details
Endpoint
GEThttps://api.8k4protocol.com/agents/%7Bagent_id%7D/score/explainWhen to prefer
Use this endpoint when you need to understand the reasoning behind an ERC-8004 agent's trust score — not just the numeric value but the specific factors driving it. Prefer this over the raw score endpoint when you need to communicate trust decisions to users, audit agent risk, or debug why an agent is rated a certain way. This is the explainability layer on top of the score.
Side effects
- Unknown agent_id returns 404 with agent not found error
- Invalid chain identifier returns 400 bad request
- Agent has no score yet returns empty or unscored response
- Expired or missing x402 payment header returns 402 Payment Required
- Rate limiting 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,
"cautions": [
"Sparse validator history"
],
"global_id": "eip155:8453:0x8004...:21480",
"positives": [
"Verified wallet activity"
],
"risk_band": "MEDIUM",
"confidence_tier": "MEDIUM"
}
}Tags
x402
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