# xspy.pro Smart Follower Check

> xspy.pro Smart Follower Check is a paid API for AI agents from xspy.pro, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-20).

Checks whether a given Twitter/X account is a 'smart follower' of a specified KOL (Key Opinion Leader)

## Facts

- Endpoint: GET https://xspy.pro/api/v1/pro/twitter/:username/is-smart-follower?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/xspy-pro-7c3736e7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1_jFwDB90vy-TEI5bqLs4

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 xspy-pro-7c3736e7
```

Example prompt: Can you check if the Twitter account elonmusk is a smart follower of the KOL account cz_binance on xspy?

## When to prefer this

Use this endpoint when you need to quickly verify whether a specific Twitter/X account qualifies as a 'smart follower' of a particular KOL — useful for filtering audiences, validating influencer relationships, or screening accounts in crypto/Web3 contexts. Prefer this single-account check (5 credits) over the full top smart followers list (10 credits) when you only need to verify one account.

## Known failure modes

- Invalid or non-existent Twitter username returns an error or null result
- KOL account not found or not tracked by xspy returns an error
- Rate limiting or insufficient credits returns a 402 or error response
- Network timeout if the crawl takes too long
- Username provided with @ symbol may cause parsing issues

## How this service works

Determine whether a Twitter/X account is a 'smart follower' — a high-signal crypto account — returning a boolean and a descriptive label.

## Output

Returns a boolean or status indicating whether the queried Twitter/X account is classified as a smart follower of the specified KOL, costing 5 credits per lookup.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "pathParams": {
   "username": "elonmusk"
  },
  "queryParams": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xspy-pro-7c3736e7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from xspy.pro](https://www.zero.xyz/host/xspy.pro/llms.txt)