OpenRTB 2.5

Quick guide for publishers to configure Panxo as a demand partner in their SSP.

Before You Start

You need:

• Your Panxo Property Key (get it from your Panxo dashboard)

• Admin access to your SSP platform

---

General Steps (All SSPs)

1

Log into your SSP admin panel

Open your SSP's admin interface.

2

Find the demand partner settings

Look for sections named "External Demand", "Demand Partners", or "Third Party Bidders".

3

Add a new bidder/partner

Click "Add New" or "Add Bidder".

4

Enter Panxo configuration

Fill in the following fields:

Field	Value
Name	Panxo
Bid Endpoint	https://panxo-sys.com/openrtb/2.5/bid?key=YOUR_KEY
Cookie Sync URL	https://panxo-sys.com/usersync?redir={REDIRECT_URL}
Protocol	OpenRTB 2.5
Timeout	500ms (or your preference)

5

Enable the partner

Enable/activate the partner in your SSP.

6

Test with a sample page

Verify the integration on a test page.

---

SSP-Specific Instructions

Xandr (Microsoft)

1

Go to Network > Partners > Bidders and click "New Bidder".

2

Fill in:

• Name: Panxo

• Bid URI: https://panxo-sys.com/openrtb/2.5/bid?key=YOUR_KEY

3

Under User Sync:

• URL: https://panxo-sys.com/usersync?redir=$REDIRECT_URL

• Type: Redirect

4

Save and enable.

---

Magnite

1

Go to Partners > Demand and click "Add Partner".

2

If Panxo is not in the list, click "Request New Partner".

3

Provide:

• Partner Name: Panxo

• Endpoint: https://panxo-sys.com/openrtb/2.5/bid?key=YOUR_KEY

• Cookie Sync: https://panxo-sys.com/usersync?redir={redirectUrl}

4

Magnite will approve and add it to your account.

---

PubMatic

1

Go to Inventory > Demand Partners and click "Add Demand Partner".

2

Select "Custom RTB" if available and enter:

• Name: Panxo

• Endpoint: https://panxo-sys.com/openrtb/2.5/bid?key=YOUR_KEY

3

If custom RTB is not available, contact PubMatic support to add Panxo.

---

Google Ad Manager (GAM)

For GAM with Open Bidding:

• Go to Delivery > Yield Groups

• Under Yield Partners, look for Panxo

• If not listed, contact your Google representative to enable Panxo

For GAM with Prebid.js:

• See Prebid adapter documentation (coming soon)

---

Adserver.online

1

Go to SSP > RTB Endpoints and click "Add Endpoint".

2

Enter:

• Name: Panxo

• Endpoint URL: https://panxo-sys.com/openrtb/2.5/bid?key=YOUR_KEY

• QPS Limit: 1000 (or as needed)

• Timeout: 700ms

3

Under Cookie Matching:

• Our sync URL: https://panxo-sys.com/usersync?redir={redirectUrlEnc}

4

Save and enable.

---

Verification

After setup, verify the integration:

1

Check Cookie Sync

Open your browser console and look for requests to:

https://panxo-sys.com/usersync...

2

Check Bid Requests

In your SSP logs or debug mode, verify:

• Bid requests are being sent to Panxo

• user.buyeruid is included in requests

• Responses are received (200 or 204)

3

Test with AI Traffic

1. Visit your site from an AI assistant (ChatGPT, Perplexity, etc.)

2. Check your Panxo dashboard for signals

3. Verify bids are being submitted

---

Troubleshooting

Panxo not in partner list

1

Contact your SSP support.

2

Send them the SSP Integration Guide.

3

They will add Panxo to your available partners.

No bids received

Check:

• Cookie sync is working (check browser network tab)

• user.buyeruid is being sent

• Your property key is correct

• The domain matches what's registered in Panxo

204 (No Content) responses — why this can happen

This is normal when:

• User hasn't been synced yet

• User is not from AI traffic

• No matching campaigns

---

Need Help?

Contact Panxo support:

• Email: [email protected]

• Dashboard: https://app.panxo.ai

---

Last Updated: January 2026