[lmm]

> you need yet another rent seeker that aggregates those APIs.

If anyone can implement such an aggregator, market competition should drive the cost of that close to zero soon enough.

[scrollaway]

And indeed it is. Nordigen's product for example is free; they make money on upselling an optional product on top.

https://nordigen.com/

[tgsovlerkhgsel]

Since the aggregator will process sensitive data, you need a lot of audits etc.

If you'd like to use the API to access your own account using open source software, good luck (unless you find an aggregator that is certified and allows you to access your own account through them).