---
title: "Connect LinkedIn with a cookie (li_at)"
description: "Find your LinkedIn li_at and li_a cookies in Chrome, Edge, Firefox or Safari and connect LinkedIn to Prosyo without a new login or security check."
url: https://prosyo.com/lb/docs/connect-accounts/linkedin-cookie/
section: "Connect your accounts"
updated: 2026-09-23
---

# Connect LinkedIn with a cookie (li_at)

Prosyo normally connects LinkedIn with your email and password in the secure sign-in window. That window has a second option — **Cookies** — which connects using the session your browser is *already* signed in with.

Nothing logs in again, so LinkedIn has no reason to send a code, ask for an app approval, or show a security check. Everything after connecting is identical: the same campaigns, the same Inbox sync, the same imports.

## When to use this instead of email and password

| What you're seeing | Why cookies fix it |
|---|---|
| **"An additional step seems necessary to complete login"** | LinkedIn wants a check it can only show you on linkedin.com. Your browser has already passed it. |
| **"LinkedIn can't accept any more requests"** | LinkedIn is rate-limiting sign-ins for your account, and every retry extends the limit. Cookies aren't a sign-in. |
| A code or app approval that never arrives | No code is needed. |
| Your authenticator app or phone isn't with you | No second factor is asked for. |
| The account connects, then drops within minutes | A session LinkedIn already trusts is more stable than a fresh login. |
| You manage a client's LinkedIn and they won't share a password | They can send cookie values instead — see [Agencies and clients](#agencies-and-clients). |

> **Note:** If you're not hitting any of these, connect the normal way. See [Connect LinkedIn](https://prosyo.com/lb/docs/connect-accounts/linkedin.md).

## What you need

| Cookie | What it is | When you need it |
|---|---|---|
| `li_at` | Your LinkedIn session | **Always** |
| `li_a` | Your premium session | Only for **Sales Navigator** or **Recruiter** — imports and searches from those tools |

> **Important:** Treat `li_at` like your LinkedIn password. Anyone holding it can act as you on LinkedIn until you sign out of all sessions.

## Before you start

- Sign in to <https://www.linkedin.com> in the browser you use every day, on the computer you'll connect from.
- Use a **normal window, not private/incognito** — an incognito session dies when you close the window, and takes the connection with it.
- Finish anything LinkedIn is showing you there: a security check, confirming your email or phone, a "is this you?" prompt. Copy the cookie only once your feed loads normally.
- Do the copying and the pasting **in the same browser on the same computer**. LinkedIn ties a session to the browser that created it, and the sign-in window records that browser when you paste.

## Find the cookies in your browser

### Chrome, Edge, Brave, Arc, Opera

1. Open <https://www.linkedin.com> and make sure you're logged in.
2. Right-click anywhere on the page and choose **Inspect**, or press `F12` (Mac: `⌥⌘I`). Developer Tools opens.
3. Open the **Application** tab along the top. If you can't see it, click the **»** at the end of the tab strip and pick it from the list.
4. In the left sidebar, under **Storage**, expand **Cookies** and click **https://www.linkedin.com**.
5. A table of cookies appears. In the **Filter** box just above it, type `li_at`.
6. Click the `li_at` row. Its full value appears in the panel at the bottom — it's a long string of letters, numbers and symbols, usually 150+ characters.
7. Copy the whole value: right-click the row and choose **Copy value**, or click into the bottom panel, select everything (`Ctrl+A` / `⌘A`) and copy.
8. Using Sales Navigator or Recruiter? Clear the filter, type `li_a`, and copy that value the same way.

> **Tip:** `li_at` and `li_a` look similar in a list. Read the **Name** column carefully — `li_a` is not the first three characters of `li_at`, it's a separate cookie.

### Firefox

1. Open <https://www.linkedin.com> and make sure you're logged in.
2. Press `F12` (Mac: `⌥⌘I`) to open Developer Tools.
3. Open the **Storage** tab. If it isn't visible, click **»** at the end of the tab strip.
4. Expand **Cookies** in the left sidebar and click **https://www.linkedin.com**.
5. Type `li_at` in the **Filter Items** box.
6. Double-click the **Value** cell of the `li_at` row to select the whole value, then copy it. You can also right-click the row and choose **Copy Value**.
7. Repeat with `li_a` if you use Sales Navigator or Recruiter.

### Safari (macOS)

1. Turn on developer features once: **Safari → Settings → Advanced →** tick **Show features for web developers**.
2. Open <https://www.linkedin.com> and make sure you're logged in.
3. Choose **Develop → Show Web Inspector**, or press `⌥⌘I`.
4. Open the **Storage** tab, then **Cookies** in the left sidebar, then **linkedin.com**.
5. Find the `li_at` row, double-click its **Value**, and copy it.
6. Repeat with `li_a` if you use Sales Navigator or Recruiter.

> **Important:** Copy the value only — no quotation marks, no `li_at=` in front, no spaces at either end. A single stray character makes the session invalid.

## Paste them into Prosyo

1. Go to **Settings → Accounts**.
2. Click the button for what you're doing:
   - **Connect LinkedIn** — your first LinkedIn account.
   - **Connect another LinkedIn** — an extra sender, on a plan or seat that allows one.
   - **Reconnect LinkedIn** — an account showing **Needs reconnect**.
   - **Finish connection** — an attempt you started earlier and didn't complete.
3. The secure sign-in window opens. Choose **Cookies** instead of entering an email and password.
4. Paste your `li_at` value. Add `li_a` as well if you use Sales Navigator or Recruiter.
5. Submit. The window closes and the account shows **Connecting**.
6. Wait for **Healthy** — usually under a minute. The page refreshes by itself.

![Settings → Accounts with a healthy LinkedIn account, the SMTP/IMAP card and the Gmail/Outlook card](https://prosyo.com/wp-content/uploads/prosyo-docs/builds/20260929-120425-nl0ixpzg/assets/assets/settings-accounts.webp)

> **Important:** Don't launch a campaign until the account shows **Healthy**. See [Account health](https://prosyo.com/lb/docs/connect-accounts/account-health.md).

> **Note:** Your cookie goes into the secure sign-in window, never into a Prosyo form, and Prosyo never shows it back to you. Prosyo keeps only the session it needs to act for you.

## Keep the connection alive

A cookie session lasts for months, but a few actions end it **immediately**:

| Action | Effect |
|---|---|
| **Signing out** of LinkedIn in that browser | Ends the session. Closing the tab or quitting the browser is fine — only signing out breaks it. |
| Changing your LinkedIn password | Ends every session, including this one. |
| **Sign out of all other sessions** on LinkedIn | Ends it. |
| Copying from a private/incognito window | Ends when that window closes. |
| Your device being wiped or the browser profile deleted | Ends it. |

When the session ends, the account moves to **Needs reconnect**, campaigns stop sending from it instead of failing, and you get a notification. Copy a fresh `li_at` and reconnect the same way.

> **Tip:** If you change your LinkedIn password on purpose, reconnect straight afterwards so nothing waits in a queue.

## If it doesn't work

| What happens | What to do |
|---|---|
| The window says the cookie is invalid | You probably copied a partial value. Copy it again, making sure you take the entire string with nothing before or after it. |
| It connects, then goes to **Needs reconnect** within minutes | You signed out of LinkedIn in that browser, or copied from an incognito window. Sign in normally, copy again, reconnect. |
| Sales Navigator imports fail but LinkedIn works | `li_a` is missing or expired, or the Sales Navigator subscription has lapsed. Reconnect with both cookies. See [Import from LinkedIn](https://prosyo.com/lb/docs/prospects/import-linkedin.md). |
| You can't find `li_at` in the list | You're not signed in to LinkedIn in that browser, or you're looking at a different site's cookies. Check that **https://www.linkedin.com** is selected on the left. |
| There's no **Application** or **Storage** tab | The tab strip is too narrow. Click **»** at its end, or widen the Developer Tools panel. |
| A work laptop blocks Developer Tools | Copy the cookie on a personal device you're also signed in on, and paste it from that same device. |
| The account still won't connect | The sign-in limit may still be running from earlier attempts. Wait a few hours without retrying, then connect with cookies once. See [Troubleshooting](https://prosyo.com/lb/docs/help/troubleshooting.md#accounts). |

## Agencies and clients

If you run outreach from a client's LinkedIn account:

- The safest option is to have the client paste their own cookie: give them a teammate seat and this page. See [Team seats and invites](https://prosyo.com/lb/docs/billing/team-seats.md).
- If they send you the value, use a password manager's secure share or a one-time secret link — never plain email, chat or a screenshot.
- Ask them not to sign out of LinkedIn in that browser afterwards, and to tell you if they change their password.
- One LinkedIn account per seat. Two people should not connect the same LinkedIn account twice in one workspace.

## Security

- `li_at` is the key to your LinkedIn account for as long as the session lives. Handle it like a password.
- Paste it only into the Prosyo sign-in window that opens from **Settings → Accounts**. It is served from `auth.prosyo.com`. If a page anywhere else asks for your LinkedIn cookie, don't paste it.
- To revoke access at any time: LinkedIn → **Settings & Privacy → Sign in & security → Where you're signed in → Sign out of all other sessions**. Every cookie session, including Prosyo's, stops working straight away.
- Prosyo support will never ask you for a cookie value.

## Related

- [Connect LinkedIn](https://prosyo.com/lb/docs/connect-accounts/linkedin.md) — the normal email-and-password route
- [Account health and reconnecting](https://prosyo.com/lb/docs/connect-accounts/account-health.md) — what each status means
- [Optimize your LinkedIn profile](https://prosyo.com/lb/docs/connect-accounts/optimize-linkedin-profile.md) — before you start sending
- [LinkedIn limits explained](https://prosyo.com/lb/docs/help/linkedin-limits-explained.md) — safe daily volumes