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+---
+title: Inventory of all URLs used for backend communication
+description: Inventory of all URLs used for backend communication
+slug: backend-urls
+---
+
+## Inventory of all URLs used for backend communication
+
+| URL   | Component    | Version | Since | Until | Notes |
+| -------- | -------- | ------- | ------- | ------- |-------|
+| https://api.ooni.org/api/v1/... | OONI Probe Android | 4.0.0 | 2024-12-01 | CURRENT | Used to retrieve OONI Run v2 descriptors [link to code]() |