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SperaxOS ERC-8004 Agent Attestation Validation
x402
SperaxOS ERC-8004 Agent Attestation Validation is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).
Retrieves and validates ERC-8004 attestation records for a specific on-chain agent by attestation type on a testnet blockchain
Price / call$0.001
Success—
StatusUnknown
How this service works
AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.
Output
Returns the attestation validation result for the specified agent token ID and attestation type on the queried testnet chain, including whether the attestation exists, is valid, and any relevant metadata about the attestation record according to the ERC-8004 standard.
Example use cases
Verify agent identity before delegation
“Before I delegate any funds, can you check whether agent token 17 has a valid identity attestation on bsc-testnet via ERC-8004?”
Compliance check for regulated workflow
“I need to confirm that agent token 88 has a compliance attestation on the Sepolia testnet — can you query that for me?”
Capability attestation lookup for integration
“Can you look up the capability attestation for agent ID 5 on bsc-testnet using the ERC-8004 standard so I can decide if this agent is cleared to act?”
Technical details
Endpoint
POSThttps://chat.sperax.io/api/x402/tools/erc8004/getValidation?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate ERC-8004 attestation records for specific on-chain agents on supported testnets (bsc-testnet or sepolia), particularly when checking identity, capability, security, or compliance attestation types. Prefer this over general blockchain explorers when you need structured, AI-agent-friendly attestation data payable per-request without API key management.
Side effects
- Invalid or non-existent agent token ID returns empty or null attestation record
- Unsupported chain name (e.g. mainnet) returns an error since only testnets are supported
- Invalid attestation type string returns no matching record
- Payment failure via x402 protocol results in 402 response and no data returned
- Network or RPC errors for the queried testnet may cause timeouts or 500 errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Blockchain to query (testnet only: bsc-testnet, sepolia) |
| agentId | string | The token ID of the agent |
| attestationType | string | The attestation type to query (e.g., identity, capability, security, compliance) |
Tags
x402
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