# ChainVerdict ERC-20 Activity Monitor

> ChainVerdict ERC-20 Activity Monitor is a paid API for AI agents from chainverdict.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns recent transfer count and volume for an ERC-20 token on Base, enabling agents to judge whether the token is actively used.

## Facts

- Endpoint: GET https://chainverdict.xyz/v1/data/activity/:addr
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainverdict-erc-20-activity-monitor-88e490b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4b8WYATRst-Mk7WyZwxdJ

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 chainverdict-erc-20-activity-monitor-88e490b4
```

Example prompt: Can you check the recent on-chain transfer activity for the ERC-20 token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base — I want to see the transfer count and volume to know if it's actually being used.

## When to prefer this

Use this endpoint when you need to quickly assess whether an ERC-20 token on Base has genuine recent usage, particularly for due diligence before trading, listing, or recommending a token. Prefer this over general blockchain explorers when you need a structured, machine-readable activity signal without scraping HTML. It is more focused than a full balance or supply check, and cheaper than running a full indexer query.

## Known failure modes

- Invalid or malformed contract address returns a 4xx error
- Contract address is not an ERC-20 on Base — may return zero activity or an error
- Network congestion may delay live chain reads
- Very new tokens with no transfers return zero counts and volume
- Rate limiting or payment failure returns a 402 or 429 response

## How this service works

Recent transfer activity for an ERC-20 on Base: transfer count and volume over the sampled window, for judging whether a token is actually in use. Live chain read.

## Output

Returns a structured payload with transfer count and total transfer volume over a sampled recent time window for the specified ERC-20 contract on Base, read live from chain. Useful for quickly assessing whether a token has genuine on-chain activity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "addr"
     ],
     "properties": {
      "addr": {
       "type": "string",
       "description": "ERC-20 contract address on Base"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainverdict-erc-20-activity-monitor-88e490b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chainverdict.xyz](https://www.zero.xyz/host/chainverdict.xyz/llms.txt)