媒体资源 API
- State
- Verified
- Lifecycle
- stable
- Applies to
- continuous deployment, verify with GET /api/version
- Last verified
- 2026-09-01
- Chain
- bitcoin / mainnet
Source and review
- Owning source
- stamp media cache, media controller, logo resolver
- Review window
- 90 days
Full source and verification record
- Owning repository
- bitcoinuniverseio/stampdex (private application source)
- Source path
- stamp media cache, media controller, logo resolver
- Applicable release
- continuous deployment, verify with GET /api/version
- Chain and network
- bitcoin / mainnet
- Lifecycle
- stable
- Last verified
- 2026-09-01
- This page
- Edit on GitHub · Bitcoin Universe platform
[!NOTE] 简体中文官方文档：说明如何直接从链上交易输出中读取 base64 图像并进行高保真展示。 核心交易规则为非托管模式，买卖双方按标准费率收取服务费，并于比特币主网进行原子结算。
These routes serve bytes, not JSON, and do not count against the API rate limit. They are the only routes served to any browser origin.
Routes
Section titled “Routes”| Method | Path | Serves |
|---|---|---|
| GET | /api/v1/stamps/assets/:file |
Raw stamp bytes, addressed as <txhash>.<ext> |
| GET | /api/v1/stamps/:id/preview |
A rendered preview. ?w=160, ?w=320, or ?w=640 returns a bounded WebP thumbnail; without w you get the original bytes |
| GET | /api/v1/src20/logo/:tick |
The token logo, resolved once on the server. 404 when no source has one |
Example
Section titled “Example”curl -o kevin-thumb.webp \ "https://stamp.api.bitcoinuniverse.io/api/v1/stamps/1472320/preview?w=320"Caching
Section titled “Caching”| Route | Header |
|---|---|
| Raw assets | Cache-Control: public, max-age=31536000, immutable |
| Previews | Cache-Control: public, max-age=86400, stale-while-revalidate=604800 |
Raw assets are content addressed, so the bytes at a given path never change. Cache them forever.
Previews honour If-None-Match and answer 304. Every media response carries
Server-Timing: media-cache;desc=hit|miss, so you can see whether the server cache
answered.
A token logo that no source has answers 404, and that 404 is itself cacheable for an hour, so a missing logo does not cost a lookup on every page view.
Why thumbnails matter
Section titled “Why thumbnails matter”Original stamp previews from the index run 60 KB to 900 KB. The ?w= WebP thumbnails
run 3 KB to 40 KB. Use thumbnails in grids and lists, and the original only in a focused
view.
Untrusted files are served defensively
Section titled “Untrusted files are served defensively”A stamp is arbitrary bytes somebody put on Bitcoin. Some of them are HTML or SVG.
- Only common image types are served with their own content type. Anything else is served as a generic binary stream, so a browser will not execute it.
- HTML and SVG previews carry a strict content security policy that sandboxes them and blocks all outbound requests, scripts, forms, and embedding from other sites.
If you are embedding stamp media in your own product, apply the same care. The bytes are not yours and were not reviewed by anybody.