# mkt_tok — Marketo's per-recipient email token

- Canonical: https://linkclean.app/trackers/mkt-tok/
- Updated: 2026-07-20
- Author: Ken Tominaga (https://ken0nek.com)
- Get the app: https://apps.apple.com/us/app/linkclean/id6758604043

Parameter: `mkt_tok` · Category: Email marketing · Vendor: Marketo (Adobe)

> mkt_tok is **Marketo's per-recipient email tracking token** — a long base64 string that joins an email click to a specific lead record in Marketo's CRM. Behaves like Mailchimp's mc_eid but in the B2B / enterprise-marketing world. High-stakes when forwarded.

## What mkt_tok encodes

Marketo (acquired by Adobe in 2018) is the dominant marketing-automation platform for B2B email. Every link in a Marketo-sent email carries `?mkt_tok=<long-base64-string>`. The token is per-recipient and per-email — Marketo joins it on the destination to identify which lead in their CRM clicked.

If you forward a Marketo email and the recipient clicks the link, Marketo records a click against *your* lead record. Engagement scores get polluted, your sales rep gets a misleading signal, and the recipient's browser hands Marketo a fingerprint join key back to your email address.

## Why this matters in B2B

B2B sales teams use Marketo engagement signals to prioritise outreach. A misattributed forward shows up as the *original* recipient (you) clicking, which can trigger sales follow-up calls or move you into a different nurture sequence. From a privacy angle, mkt_tok is the B2B equivalent of mc_eid.

## How LinkClean removes it

Default-on in the email-marketing catalog.

## Example

Looks like this in a URL: `https://example.com/whitepaper?mkt_tok=ODg5LU9PTi0xMjMAAAGRabcdefg1234567890XYZ`

After LinkClean: `https://example.com/whitepaper`

## Frequently asked

**Is mkt_tok personal data?**

Yes — it's per-recipient, base64-encoded, and joins back to a specific lead record in Marketo's CRM (which is keyed to the email address). Functionally identity-linked.

**How is mkt_tok different from utm_source?**

utm_source names a marketing channel. mkt_tok identifies *the specific person* the email was sent to. Different blast radius entirely.

**Will the article still load if I strip mkt_tok?**

Yes. Marketo's tracking pixel reads it; the destination page itself never uses it.


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