# Rate limits for direct CDN image downloads?

**URL:** <https://forum.mapillary.com/t/rate-limits-for-direct-cdn-image-downloads/10339>\
**Category:** Imagery\
**Created:** [April 28, 2026, 8:58pm UTC](https://forum.mapillary.com/t/rate-limits-for-direct-cdn-image-downloads/10339 "2026-04-28T20:58:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![malyeta](https://avatars.discourse-cdn.com/v4/letter/m/a5b964/32.png) [@malyeta](https://forum.mapillary.com/u/malyeta)\
**Post date:** [April 28, 2026, 8:58pm UTC](https://forum.mapillary.com/t/rate-limits-for-direct-cdn-image-downloads/10339/1 "2026-04-28T20:58:44Z")

</div>

Hello,

I’m batch-downloading images by extracting the `thumb_original_url` via the Graph API and fetching them directly from the Facebook CDN (e.g., `https://scontent``.*.fna.fbcdn.net/...`).

Since the API docs don’t cover direct CDN downloads, I would like to know the specific rate limits, concurrency thresholds, or max requests-per-second for these URLs?

I want to tune my multi-threading and backoff logic to be a responsible user and avoid HTTP 429s or IP bans. Any insights on how the CDN throttles these GET requests would be highly appreciated!

Thanks!

---

<div class="post-metadata">

**Author:** ![boris](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.mapillary.com/boris/32/71767_2.png) [@boris](https://forum.mapillary.com/u/boris)\
**Post date:** [April 29, 2026, 11:42am UTC](https://forum.mapillary.com/t/rate-limits-for-direct-cdn-image-downloads/10339/2 "2026-04-29T11:42:40Z")

</div>

Hi @malyeta - can you share a bit about your use case? Why are you batch-downloading images?

---

<div class="post-metadata">

**Author:** ![malyeta](https://avatars.discourse-cdn.com/v4/letter/m/a5b964/32.png) [@malyeta](https://forum.mapillary.com/u/malyeta)\
**Post date:** [April 29, 2026, 11:09pm UTC](https://forum.mapillary.com/t/rate-limits-for-direct-cdn-image-downloads/10339/3 "2026-04-29T23:09:54Z")

</div>

I am working on a research project focused on wildlife conservation and public health. We are batch-downloading a specific subset of imagery to analyze the distribution of free-roaming dog populations in various urban environments. I’m asking about rate limits to ensure my research tools remain compliant with your CDN policies and avoid unnecessary overhead.

---

<div class="post-metadata">

**Author:** ![boris](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.mapillary.com/boris/32/71767_2.png) [@boris](https://forum.mapillary.com/u/boris)\
**Post date:** [April 30, 2026, 9:26am UTC](https://forum.mapillary.com/t/rate-limits-for-direct-cdn-image-downloads/10339/4 "2026-04-30T09:26:16Z")

</div>

Got it, I think we don’t share the specific CDN rate limiting information, however if you’re only looking at specific areas, I think you should be OK. Mapillary runs on Meta infrastructure, here’s [what ChatGPT has to say about CDN rate limiting](https://chatgpt.com/share/69f31fd8-4730-8325-9b64-ff73e9979775).