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SperaxOS ERC-8004 Subgraph Query API
x402
SperaxOS ERC-8004 Subgraph Query API is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Queries the ERC-8004 on-chain agent registry subgraph to retrieve data about registered agents, ownership transfers, reputation feedback, and aggregate protocol statistics.
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 a list of on-chain records matching the query — either agent registration objects (tokenId, owner, metadata, createdAt), transfer events (from, to, tokenId, timestamp), reputation feedback entries (agentId, score, comment, submitter), or aggregate protocol stats — filtered, sorted, and paginated according to the request parameters.
Example use cases
Discover top-rated on-chain AI agents
“Pull the top 20 ERC-8004 agents from SperaxOS ranked by their reputation score in descending order so I can see which agents have the best community feedback.”
Audit ownership transfers for a wallet
“Find all ERC-8004 ownership transfer events where the owner is 0xABC123... and sort them by createdAt descending so I can see the most recent transfers first.”
Check ERC-8004 protocol statistics
“Fetch the aggregate protocol stats from the ERC-8004 subgraph on SperaxOS — I want to see total agents registered, total transfers, and overall protocol activity.”
Technical details
Endpoint
POSThttps://chat.sperax.io/api/x402/tools/erc8004/querySubgraph?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to query the ERC-8004 on-chain agent registry specifically — including agent discovery, ownership history, reputation feedback, or protocol-wide statistics on Base. Prefer this over general blockchain explorers when you want structured, filterable subgraph data without writing raw GraphQL queries, and when you want per-request micropayment access without managing API keys.
Side effects
- Invalid entity enum value returns a validation error
- Malformed JSON string in the where filter causes a parse error
- Requesting more than 100 results returns a max-limit error
- Unknown orderBy field may return an empty or unordered result set
- Payment of 0.001 USDC via x402 not completed results in HTTP 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| first | number | Number of results to return (max 100) |
| where | string | Optional filter as JSON string (e.g., {"owner": "0x..."} or {"agentId": "5"}) |
| entity | string | The subgraph entity to query: agents (registered agents), transfers (ownership changes), feedbacks (reputation feedback events), stats (aggregate protocol statistics) |
| orderBy | string | Field to order results by (e.g., createdAt, score, tokenId) |
| orderDirection | string | Sort direction: asc or desc |
Tags
x402
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