SubID tracking
Use dynamic SubIDs to track affiliate clicks by post, product, and placement
A SubID (also called subid, sub, sid, aff_sub, sub1–sub5, etc.) is a custom value you append to an affiliate link so your network reports which click converted.
In Content Egg, anywhere you set a Deeplink, you can insert dynamic placeholders (post, product, site data) to auto-build SubIDs—great for slicing performance by post, author, product, placement, and more.
Common SubID parameters by network
Network
SubID parameter(s)
Impact
subId1 … subId5
Rakuten Advertising (LinkShare)
u1
Awin
clickref, clickref2
CJ (Commission Junction)
sid
eBay Partner Network
customid
Tradedoubler
epi, epi2
TUNE / HasOffers (many CPA networks)
aff_sub … aff_sub5
ShareASale
afftrack
Some programs support multiple SubID slots. Check your network docs for exact limits and allowed characters.
Example (Awin)
Deeplink with SubID using post ID + product ID, and ued pointing to the destination URL:
https://www.awin1.com/cread.php?awinmid=MERCHANT_ID&awinaffid=AFFILIATE_ID&clickref={{post_id}}-{{item_unique_id}}&ued={{url_encoded}}Safe SubID variants (recommended)
Most text placeholders also support safe variants:
{{..._encoded}} – URL-encoded
{{..._base64}} – Base64
{{..._slug}} – slugified
{{..._subid}} / {{..._subid32}} – compact, safe SubID encoding (length-capped; alphanumeric + _-.)
Use these to avoid characters your network rejects.
Testing & validation
Always test clicks in your affiliate network to confirm SubIDs are recorded.
Some networks trim or reject certain characters; use the safe variants above.
Watch parameter length limits (many networks accept ~100 chars; some less).
Override per-block with shortcode
You can inject/override query params via add_query_arg:
[content-egg module=Bolcom template=grid add_query_arg="subid={{post_url_relative_subid32}}.top_block.{{item_ean}}"]This passes: page path (safe), a placement label top_block, and the product EAN—perfect for granular reporting.
Amazon note
Amazon does not support SubIDs. Use Tracking IDs instead (limit ~100 per account). Example:
[content-egg module=Amazon add_query_arg="tag=CUSTOM_TAG"]Create and assign distinct Tracking IDs per site/section/campaign as needed.
URL Dynamic Placeholders
Use placeholders to inject dynamic values (product, page, site) into your affiliate SubIDs and deeplink parameters. Templates accept placeholders wrapped in {{...}}. At render time, each placeholder is replaced with the actual value from the product and the current page.
You can use these anywhere Content Egg asks for a SubID/Deeplink template.
Example template:
subid={{post_id}}-{{item_unique_id}}&name={{item_title_slug}}&page={{post_url_encoded}}&ref={{site_domain}}&mod={{item_module_id}}Might resolve to:
subid=6231-9300000069648999&name=polymaker-polyterra-pla-1-75mm-1kg-matte-black&page=https%3A%2F%2Fexample.com%2Fbest-pla-filaments%2F&ref=example.com&mod=BolcomWhat’s supported
1) Basic
{{url}} — original URL
{{url_encoded}} — url via urlencode
{{url_base64}} — base64 of url
{{post_id}}
{{item_unique_id}}
{{author_id}}, {{author_login}}
2) Product placeholders
{{item_title}}
{{item_brand}} (from manufacturer if present)
{{item_sku}}, {{item_ean}}, {{item_upc}}, {{item_isbn}}
{{item_price}}, {{item_currency}} (ISO code, e.g., EUR)
{{item_domain}} (e.g., bol.com)
{{item_module_id}} (module ID like Bolcom)
{{item_group}}
3) Page / Post placeholders (from current post)
{{post_title}}, {{post_slug}}, {{post_type}}
{{post_url}} (absolute permalink)
{{post_url_relative}} (relative path of the post)
{{post_author}} (author display name)
{{post_date}} (YYYY-MM-DD)
4) Site / Global
{{site_name}}
{{site_domain}} (host part of home_url)
{{site_locale}} (e.g., en_US)
5) Time / Utility
{{date}} (today in site’s local time, YYYY-MM-DD)
{{timestamp}} (current Unix timestamp)
{{uuid}} (random UUID v4 if available in WP)
{{post_hash}} (short stable hash of post_id:item_unique_id → 8 chars)
Automatic variants
For most text placeholders, we also provide:
{{..._encoded}} — URL-encoded value
{{..._base64}} — Base64-encoded value
{{..._slug}} — slugified value (only for non-URL strings)
Examples
{{item_title}} → {{item_title_encoded}}, {{item_title_base64}}, {{item_title_slug}}
{{post_title}} → {{post_title_encoded}}, {{post_title_base64}}, {{post_title_slug}}
{{post_url}} → {{post_url_encoded}}, {{post_url_base64}} (no slug for URLs)
SubID-safe variants (recommended for network limits)
Many affiliate networks restrict SubID character sets and length. Use these safe variants where you pass SubIDs:
{{..._subid}} — ASCII-safe, common-denominator encoding, up to 100 chars
{{..._subid64}} — same, capped at 64 chars
{{..._subid32}} — same, capped at 32 chars
If a value must be truncated, a short hash is appended to keep it stable.
Examples
Awin
https://www.awin1.com/cread.php?awinmid=MERCHANT_ID&awinaffid=AFFILIATE_ID&clickref={{post_id}}-{{item_unique_id}}&ued={{url_encoded}}CJ (Commission Junction)
https://www.anrdoezrs.net/click-AFFID-MERCHANTID?sid={{post_id}}-{{item_unique_id}}&url={{url_encoded}}Impact
https://tracking.impact.com/aff_c?offer_id=OFFER_ID&aff_id=PARTNER_ID&subId={{post_id}}-{{item_unique_id}}&redirect={{url_encoded}}ShareASale
https://shareasale.com/r.cfm?b=BANNER_ID&u=AFFILIATE_ID&m=MERCHANT_ID&urllink={{url_encoded}}&afftrack={{post_id}}-{{item_unique_id}}Rakuten Advertising
https://click.linksynergy.com/deeplink?id=AFFILIATE_ID&mid=MERCHANT_ID&murl={{url_encoded}}&u1={{post_id}}-{{item_unique_id}}TradeDoubler
https://clk.tradedoubler.com/click?p=PROGRAM_ID&a=AFFILIATE_ID&epi={{post_id}}-{{item_unique_id}}&url={{url_encoded}}Partnerize (Performance Horizon)
https://prf.hn/click/camref:CAMREF/destination:{{post_url_encoded}}?clickref={{post_id}}-{{item_unique_id}}FlexOffers
https://track.flexlinks.com/a.ashx?foid=FOID&foc=FOC&fos=FOS&subId={{post_id}}-{{item_unique_id}}&url={{url_encoded}}Admitad
https://ad.admitad.com/g/PROGRAM_ID/AFFILIATE_ID/?subid={{post_id}}-{{item_unique_id}}&ulp={{url_encoded}}Last updated