Create your free card

Send your contacts to your CRM, Slack or AI assistant

Every contact your card brings in can go straight on: to Zapier or Make with Pro, and with Business to HubSpot, Zoho CRM and Slack, your own scripts through the API, and AI assistants like Claude over MCP.

Try Linq Business free for 7 days Read the setup guide

Where your contacts can go

Someone shares their details from your card, you scan their badge, or you type them in. Linq can send that contact on the moment it's added, so it's in the place your team already works, with where you met and your tags.

Webhooks to Zapier, Make or your own server

With Pro, add a webhook under Integrations and every new contact is sent to it as soon as it's added: shared from your card, scanned, or added by you. Most tools take webhooks: a Catch Hook in Zapier, a custom webhook in Make, a HubSpot workflow that starts from a webhook, or your own server. From there, the contact can go to almost any CRM or spreadsheet.

  • Up to 5 webhooks, for example one for your CRM and one for a spreadsheet.
  • Send test sends a sample contact, so you can map the fields before anyone real comes in.
  • Each request is signed with the webhook's own secret (HMAC-SHA256), so your server can check it came from Linq.
  • If your tool doesn't answer, Linq tries again 3 times over about half an hour, and shows how the last delivery went.
  • Webhooks only go to public https addresses, never to private networks.

If you go back to Free, your webhooks are kept but paused. Setup and the fields sent: Integrations.

Connected apps: HubSpot, Zoho CRM and Slack

With Business, connect HubSpot, Zoho CRM and Slack directly under Integrations, with nothing to set up in between:

  • HubSpot: new contacts become leads or contacts there.
  • Zoho CRM: new contacts become leads or contacts there.
  • Slack: a message to a channel for each new contact.

New contacts go there straight away, and later edits update the same record. Contacts go one way, from Linq to the app, and your private notes are never sent. A team's owners and admins can connect an app once for everyone under Team → Integrations: every contact the team's cards capture goes through, whoever captured it.

What Linq keeps to reach these apps, such as sign-in tokens, is stored encrypted. More in Connected apps.

Your AI assistant, working with your contacts

With Business, connect your AI assistant to your Linq contacts: Claude Code, Claude Desktop, Cursor and VS Code, or any other app that supports MCP (the Model Context Protocol). Then ask in plain words, and your assistant finds, adds and updates contacts for you. Things to ask:

  • “Who did I meet at Web Summit?”
  • “Which follow-ups are due this week?”
  • “Add Jane Cooper from Acme, jane@acme.com, met at the trade show.”
  • “Mark Daniel as contacted and remind me to call him on Friday.”
  • “Group the people I met this month by company.”

What it can do

  • Search and list your contacts
  • See your open follow-ups
  • Read a contact in full: notes, tags, answers to your form
  • Add new contacts
  • Update details, status, tags, notes and follow-up dates
  • List your events, to find who you met where

What it can't do

  • Delete contacts
  • Send emails or messages for you
  • See anything but your own contacts
  • Keep working after you revoke its key: it stops at once

Connect it in a minute

  1. In the app, open Integrations → Connect your AI assistant and choose your AI app.
  2. Select Create a key. The setup it shows already holds your new key: copy it now, because it isn't shown again.
  3. Paste it where the page says (a terminal command for Claude Code, a settings file for the others), and restart the app if it asks.
  4. Open a new chat and ask your first question.

Apps whose connectors only sign in with OAuth, such as claude.ai's and ChatGPT's custom connectors, can't use a key yet, so they can't connect. Claude Desktop covers Claude users today. The full guide, with every setup: AI assistants (MCP).

The REST API, for your own tools

With Business, your own scripts can read and write your contacts: list and search them, add one, update its status or follow-up date, delete it, list your events, and register a hook that receives new contacts. Send a key as the Bearer token to https://app.linq-business.com/api/v1.

  • A key acts as you: it reaches your own contacts and events, through the same rules as the app, and nothing else.
  • Up to 10 keys, one per app or script, each showing when it was last used.
  • Only a fingerprint (a hash) of each key is stored, so the key is shown once, when you make it.
  • Revoke stops a key at once. Keys also stop if your account leaves Business, and work again if you come back.
  • 120 requests a minute per key; past that, the API asks you to wait.

Every request and field: REST API.

Built to be safe with your contacts

Webhooks are signed and never sent to private addresses. API keys are stored as hashes and can be revoked at once. An AI assistant can't delete anything, can't send anything, and is told to treat what strangers typed on your form as data, not instructions. More in Security at Linq.

Which plan you need

  • Pro, $6.99 a month: webhooks to Zapier, Make, HubSpot workflows or your own server.
  • Business, $29.99 a month with a team included: HubSpot, Zoho CRM and Slack, AI assistants over MCP and the REST API, plus the Business Card and the admin tools.

Both start with a 7-day free trial. Compare the plans.

Questions, answered

More in the documentation, or get in touch.

Which plan do I need?

Webhooks come with Pro, at $6.99 a month. Connected apps (HubSpot, Zoho CRM and Slack), AI assistants over MCP and the REST API come with Business, at $29.99 a month with a team included. Both start with a 7-day free trial.

Does Linq work with HubSpot, Salesforce or my CRM?

On Business, Linq connects directly to HubSpot, Zoho CRM and Slack. For any other CRM, send contacts with a webhook on Pro: Zapier and Make connect to most CRMs, HubSpot and Salesforce included, and a HubSpot workflow can start from a webhook on its own.

Which AI assistants can I connect?

Claude Code, Claude Desktop, Cursor and VS Code, with a setup the app writes for you, and any other app that can add an MCP server with a header. Apps whose connectors only sign in with OAuth, such as claude.ai's and ChatGPT's custom connectors, can't use a key yet; Claude Desktop covers Claude users.

Can my AI assistant delete contacts or send emails?

No. It can search, read, add and update your contacts and list your events. It can't delete contacts, send emails or messages, see anyone else's contacts (team contacts included) or change your card. A draft it writes stays in the assistant.

What does a webhook send?

One JSON request per new contact, as soon as they're added: their name, email, phone, company, job title and website, where you met and your tags, how they arrived (shared from your card, added by you or scanned), which of your cards they're on, and when. Each request is signed so your server can check it came from Linq.

Do changes in Linq reach my CRM?

With a connected app, yes: later edits update the same record there, and your private notes are never sent. A webhook sends each contact once, when they're added; tags or follow-ups added later aren't sent again.

What if my tool is down when a contact comes in?

Linq tries a webhook again 3 times over about half an hour, and Integrations shows whether the last delivery went through, or why it didn't.

Do my team's contacts go through too?

Yes, for connected apps: a team's owners and admins can connect them under Team → Integrations, and every contact the team's cards capture goes through, whoever captured it. Webhooks, API keys and AI assistants work with your own contacts.

Stop copying contacts by hand.

Webhooks come with Pro at $6.99 a month. Business, at $29.99 a month, adds connected apps, the API and your AI assistant, and starts with a 7-day free trial.

Create your free card Read the quick start
  • Free for good
  • No app, on either side
  • English, French, Arabic