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8k4 Protocol — Agent Metadata Lookup
x402
8k4 Protocol — Agent Metadata Lookup 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 processed metadata for a specific ERC-8004 agent, including name, chain, and agent ID information
Price / call$0.001
Success—
StatusDown
How this service works
Get processed metadata response for an agent
Output
A JSON object containing the agent's chain (e.g. 'base'), numeric agent_id, and a metadata sub-object with at minimum the agent's registered name (e.g. '8k4 Protocol Trust Oracle') and other ERC-8004 profile fields.
Example use cases
Verify agent identity before interaction
“Before I let this agent handle any transactions, can you pull up its ERC-8004 metadata by ID so I can confirm its registered name and which chain it's operating on?”
Look up unfamiliar agent details
“I've got agent ID 38921 showing up in my logs but I don't recognize it — can you fetch its metadata from the 8k4 Protocol so I can see what it's called and where it's registered?”
Audit registered agent profile fields
“I need to review all the profile fields on file for agent ID 15703 in the 8k4 Protocol — grab the full metadata record so I can check the name, chain, and any other registration details stored for it.”
Technical details
Endpoint
GEThttps://api.8k4protocol.com/agents/%7Bagent_id%7D/metadata.jsonWhen to prefer
Use this endpoint when you need the basic registered identity and metadata for a known agent ID on the 8k4 Protocol network — specifically when you already have the numeric agent_id and want its name, chain, and profile fields rather than a trust score or validation history.
Side effects
- Agent ID not found — 404 with empty or error response
- Invalid agent_id format — malformed URL parameter
- Agent exists but metadata not yet processed — partial or empty metadata object
- Network or API downtime — connection timeout or 5xx error
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"agent_id": 21480,
"metadata": {
"name": "8k4 Protocol Trust Oracle"
}
}
}Tags
x402
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