> ## Documentation Index
> Fetch the complete documentation index at: https://express-rate-limit.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Instance API

## `resetKey(key)`

Resets the rate limiting for a given key. An example use case is to allow users
to complete a captcha to reset their rate limit, then call this function.

Example:

```ts theme={null}
import { rateLimit } from 'express-rate-limit'

const limiter = rateLimit({
    skip: (req) => req.url === '/reset', // Don't limit the reset url!
	// ...
})

app.use(limiter)

app.post('/reset', async (req, res) => {
    if (/* Validate that they completed the captcha or whatever */) {
        limiter.resetKey(req.ip);
        res.send('Rate limit is reset!')
    } else {
        res.status(400).send("Wrong answer, try again.")
    }
})
```

If you use a custom [`keyGenerator`](/reference/configuration#keygenerator), be
sure to replace `req.ip` with the correct key.

## `getKey(key)`

Retrieves the hit count and reset time from the store for a given key.

Note: `getKey` depends on store support. It works with the MemoryStore and
cluster-memory-store, but may not work with other stores. Calling it will throw
an error if the store does not have a `get` method.