You don't want to use the (inbound) Marketo API. You want to look up your leads against the DNC list, not the other way around, and you'd never have enough API calls to do this inbound (and it would kill your instance even if you did).
You'd use a webhook (i.e. Marketo's outbound API) for this. The webhook platform could reach out to each of these databases (in parallel for speed) for each of your leads. A one-time backfill will take care of the current database, then you run the webhook again when a new lead comes or a phone field changes.
Thanks Sanford. That makes perfect sense.
I am also trying to identify all the B2B DNC list across all EU countries. So far, it has been challenging to find an aggregation of it so we can have one vendor for it all.
Hi Axel - we're dealing with these challenges today (primarily in the EU). Just circling back to see if you've identified a scalable/automated solution that integrates well into your Marketo environment. I'd appreciate any details you can share. Thanks!
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Unfortunately we have not. From what I have been told, only the UK has an official body that handles this where you can pay a subscription to validate the numbers. It is call the CTPS : https://www.tpsonline.org.uk/tps/whatiscorporatetps.html
No other EU country seems to have something like that, that I could find.
If you find a solution, I would love to hear about it.