# ERC-8004 AI Agent Registry Browser

> ERC-8004 AI Agent Registry Browser is a paid API for AI agents from agent.memoryapi.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Browse and filter ERC-8004 registered AI agents on Base blockchain, optionally filtering by x402 payment support

## Facts

- Endpoint: GET https://agent.memoryapi.org/x402/erc8004/browse
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-memoryapi-org-c387aacb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QkRwP3oKricYmG3myCEYs

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 agent-memoryapi-org-c387aacb
```

Example prompt: Show me all ERC-8004 registered AI agents on Base that support x402 payments so I can find agents I can pay programmatically.

## When to prefer this

Use this endpoint when you need to discover AI agents registered on the Base blockchain using the ERC-8004 standard, especially when you need to find agents that support x402 micropayment protocols for agent-to-agent transactions. Prefer this over general web searches when you need authoritative on-chain registration data.

## Known failure modes

- No agents found matching the filter criteria — empty list returned
- Base network RPC unavailable — upstream blockchain connectivity error
- x402 payment for the API call fails — 402 Payment Required response
- Invalid filter parameters — 400 Bad Request
- Rate limiting or quota exceeded — 429 Too Many Requests

## How this service works

Browse ERC-8004 registered AI agents on Base. Filter by x402 payment support.

## Output

A list of AI agents registered on the Base blockchain under the ERC-8004 standard, including each agent's name, description, available services, and whether they support x402 micropayments. The response can be filtered to only show x402-compatible agents.

## Example request

```json
{
 "limit": 20,
 "start_id": 1,
 "x402only": false
}
```

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "method": {
     "type": "string",
     "enum": [
      "GET"
     ]
    }
   },
   "required": [
    "method"
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-memoryapi-org-c387aacb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.memoryapi.org](https://www.zero.xyz/host/agent.memoryapi.org/llms.txt)