> ## Documentation Index > Fetch the complete documentation index at: /help/llms.txt > Use this file to discover all available pages before exploring further. # Understanding limits > The two kinds of limits on every LinkedIn account in Kerux, what happens when one is reached, and why some checks pause or take a while. Every LinkedIn account in Kerux works within two kinds of limits: 1. **Kerux's safety limits on actions**: how many invitations, messages, profile visits and so on each account sends per day or week. You can see and change them. 2. **Limits on calls to LinkedIn**: how often Kerux may talk to LinkedIn for each account, for sending and for reading. They are fixed at safe values. Both exist to keep your account looking like a person using LinkedIn. Going faster is what gets accounts slowed down, flagged or restricted. ## 1. Kerux's safety limits on actions These are the daily and weekly numbers per account (for example 15 invitations a day and 80 a week, 40 messages a day), plus warm-up for new accounts and halving invitations when acceptance is low. The full table, and how to change them, is in [Limits and warm-up](/help/account-safety/limits-and-warm-up.md). When an account reaches one of these limits, its contacts wait and continue by themselves in the next free slot, usually the next day (for a weekly limit, such as invitations or InMails, when older actions leave the last 7 days). A waiting contact shows **The LinkedIn account used today's budget; next free slot is coming**. ## 2. Limits on calls to LinkedIn Everything Kerux does for an account is a call to LinkedIn: sending an invitation, sending a message, opening a profile, reading the list of chats, checking invitations you received, checking who viewed your profile, and so on. Each **kind** of call has its own allowance, per LinkedIn account: | Kind of call | Limit | | - | - | | Each kind of call, on its own | About 100 a day, and at most 10 a minute | | Sending invitations | At most 50 a day, and 1 every 10 seconds | | Opening a profile | At most 1 a second | These are the recommended safe values, and Kerux keeps to them. Calling LinkedIn more often risks LinkedIn slowing down, flagging or restricting the account. Kerux's safety limits on actions are lower than these. A campaign normally reaches its daily limits from section 1 long before it gets near these. ### Background checks never take room from your campaigns Because each kind of call has its own allowance, checking invitations you received or profile views never uses up the room your campaigns need to send invitations and messages. When a campaign starts from received invitations or profile views, Kerux checks for them about 66 times each on a weekday. That is well under the 100 a day for each. See [How fast Kerux sees LinkedIn activity](/help/account-safety/how-fast-kerux-sees-linkedin.md) for the full schedule. ## What happens when LinkedIn asks Kerux to slow down If one kind of call reaches its limit, LinkedIn asks Kerux to wait. Then: * **Only that kind of call waits.** Everything else keeps going. * **Kerux doesn't insist.** A campaign action waits the full time LinkedIn asks; a check (for example invitations received) is skipped and tried again at its next scheduled time. Trying again sooner doesn't help and only keeps the account slowed down. * **Campaigns keep sending** if the kind that waits is a check. * **Replies and messages still arrive.** They reach Kerux right away and don't use checks. If LinkedIn refuses a campaign action because of a limit, that action (for example invitations) waits on that account while the other actions continue. Contacts waiting for it show **LinkedIn refused (limit reached); it will retry later** and continue by themselves. You don't need to do anything. ## Which limit am I seeing? | What you see | What it means | What to do | | - | - | - | | A contact shows **The LinkedIn account used today's budget; next free slot is coming** | The account reached a Kerux safety limit for today | Nothing. Contacts continue in the next free slot. To go faster, add another LinkedIn account to the campaign. | | A contact shows **LinkedIn refused (limit reached); it will retry later** | LinkedIn asked Kerux to slow down for that action | Nothing. Kerux retries when LinkedIn allows it. | | A message shows **Not sent: LinkedIn asked us to slow down with messages for now.** | LinkedIn asked Kerux to pause messages on that account | Nothing. Kerux sends again when LinkedIn allows it. | | A contact shows **Outside working hours** | The campaign's sending hours are over | Nothing, or change the hours in the campaign's **Settings > Sending schedule**. | | A profile view or received invitation shows up late | Kerux checks for these on a schedule | See [How fast Kerux sees LinkedIn activity](/help/account-safety/how-fast-kerux-sees-linkedin.md). | > [accordion] Why did a profile view take a while to show up? > > LinkedIn doesn't tell Kerux about profile views, so Kerux checks for them on a schedule: every 15 minutes during the day on weekdays, every 30 minutes on weekends, and less often at night. See [How fast Kerux sees LinkedIn activity](/help/account-safety/how-fast-kerux-sees-linkedin.md). LinkedIn shows the full list of viewers only to **Premium** accounts, and anonymous viewers never appear. > [accordion] Why did Kerux skip a check for invitations? > > LinkedIn asked Kerux to slow down for that kind of check on this account. Kerux skips it and tries again at the next scheduled check, by itself. Your campaigns keep sending, and replies and messages keep arriving meanwhile. > [accordion] Can I raise the limits on calls to LinkedIn? > > No. They are set to the recommended safe values to protect your account. You can change Kerux's safety limits on actions, within a safe maximum, in [Limits and warm-up](/help/account-safety/limits-and-warm-up.md). > [accordion] Will a check ever make my campaign send a message to someone who already replied? > > No. Before a campaign sends a message, Kerux always checks that conversation for a new reply first, whatever the check schedule says. If the person already answered, the message isn't sent and the reply is handled like any other. > [accordion] My campaign is slower than I expected > > The usual reason is Kerux's daily safety limits, warm-up on a new account, or the campaign's sending hours. Open a waiting contact to see the exact reason. To send more per day, add another LinkedIn account to the campaign. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.