Case study

edgestash: reconstructing Vercel Blob and Upstash Redis API behavior

edgestash implements a self-hosted server for the Vercel Blob and Upstash Redis REST APIs, allowing their published SDKs to use a different endpoint. The author reports using REA to inspect SDK bundles for headers, error mappings and rate-limit Lua scripts, then documenting behavior in API specs and testing the implementation against Redis and SDK clients.

Targets: Website
Category: Community REA investigations
Relationship: Author-reported mixed workflow
Sources reviewed: 2026-11-07

Stars: 0
Last commit: 2026-10-21
Language: TypeScript
License (GitHub): MIT

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: Node.js 20 or later and pnpm are required for the documented source workflow.
Testing evidence: The author reports 2,381 of 2,381 differential Redis cases matching redis-server 8.0.2.
Limits: The embedded engine is single-node and snapshot-based; some Blob and Redis operations are unimplemented.
License: MIT license.

Cite

BibTeX

@misc{edgestash-case,
  title = {{edgestash: reconstructing Vercel Blob and Upstash Redis API behavior}},
  howpublished = {\url{https://github.com/devtechedge/edgestash}},
  url = {https://github.com/devtechedge/edgestash},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/edgestash-case/}}
}

Plain text

edgestash: reconstructing Vercel Blob and Upstash Redis API behavior. https://github.com/devtechedge/edgestash (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/edgestash-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

README.md GitHub · devtechedge/edgestash · Revision 783df97
docs/LIMITATIONS.md GitHub · devtechedge/edgestash · Revision 783df97