# SperaxOS ERC-8004 Agent Search Across All Chains

> SperaxOS ERC-8004 Agent Search Across All Chains is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-22).

Search for ERC-8004 on-chain agents by name or description across all supported blockchain networks

## Facts

- Endpoint: POST https://chat.sperax.io/api/x402/tools/erc8004/searchAllChains?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speraxos-erc-8004-agent-search-across-all-chains-7aa8eb32
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BSTkek7PtItGvlpPCMrXm

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability speraxos-erc-8004-agent-search-across-all-chains-7aa8eb32 -d '<json body>'
```

Example prompt: Search all chains for ERC-8004 agents related to 'yield optimization' and show me up to 10 results per chain.

## When to prefer this

Use this endpoint when you need to discover or audit ERC-8004 compliant on-chain agents across multiple blockchain networks in a single call. Prefer it over chain-specific agent lookups when you do not know which chain an agent is deployed on, or when you want comprehensive multi-chain coverage. Best suited for agent discovery, directory use cases, and cross-chain DeFi intelligence workflows that require no API key and can pay per request via x402/USDC.

## Known failure modes

- No agents found matching the query — empty result set returned
- Query string too vague — returns unrelated agents
- limit exceeds maximum of 20 — request rejected with validation error
- Payment of $0.02 USDC on Base not fulfilled — 402 Payment Required response
- Network timeout if querying many chains simultaneously

## 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

A list of ERC-8004 agent records matching the search query, organized by chain. Each result typically includes the agent's name, description, contract address, and the chain it is deployed on. Total results equal limit multiplied by the number of supported chains.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number",
   "default": 5,
   "maximum": 20,
   "description": "Maximum results to return per chain (total results = limit × number of chains)"
  },
  "query": {
   "type": "string",
   "description": "Search term to match against agent names and descriptions across all chains"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speraxos-erc-8004-agent-search-across-all-chains-7aa8eb32/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.sperax.io](https://www.zero.xyz/host/chat.sperax.io/llms.txt)