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8k4 Protocol — Upload ERC-8004 Agent Metadata
x402
8k4 Protocol — Upload ERC-8004 Agent Metadata is a paid API for AI agents from api.8k4protocol.com, paid per call via x402, $0.1/call, status down (last checked 2026-09-15).
Upload signed ERC-8004 metadata for a specific agent to register or update its on-chain trust profile
Price / call$0.1
Success—
StatusDown
How this service works
Upload signed ERC-8004 metadata
Output
Returns a JSON object containing the metadata URI where the agent's metadata is now hosted (e.g. https://api.8k4protocol.com/metadata/base/21480.json), the chain name (e.g. 'base'), and the agent_id that was registered.
Example use cases
Example prompt
“Upload the signed ERC-8004 metadata for agent ID 21480 on the Base chain to the 8k4 Protocol so it gets a trust profile URI.”
Technical details
Endpoint
POSThttps://api.8k4protocol.com/agents/%7Bagent_id%7D/metadataWhen to prefer
Use this endpoint when you need to register or update a signed ERC-8004 metadata record for a specific AI agent on the 8k4 Protocol trust network. This is the write operation for agent metadata — use sibling endpoints for reading trust scores, score explanations, or validation history.
Side effects
- Invalid or missing agent_id returns a 400 or 404 error
- Unsigned or malformed ERC-8004 metadata payload causes a validation rejection
- Signature verification failure returns an authorization error
- Duplicate metadata upload for same agent may conflict or overwrite depending on protocol rules
- Payment of 0.1 USDC not received results in x402 payment required error
- Unsupported chain identifier causes a chain resolution error
Output
Schema · Response
{
"type": "json",
"example": {
"uri": "https://api.8k4protocol.com/metadata/base/21480.json",
"chain": "base",
"agent_id": 21480
}
}Tags
x402
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