Upstash Vector indexes must be created outside the SDK, dimension is fixed

Create the Upstash Vector index in the console or via API/Terraform first, choosing the dimension and similarity function deliberately since they are permanent. Verify the dimension matches your embedding model before writing any vectors; a mismatch fails every write.

Context: Web adapter docs: documents the gotcha that an Upstash Vector index's dimension and similarity function are fixed at creation, and the SDK has no call to create an index. Agents that try to create the index in code will find no API for it; you must create it in the console, the developer API, or Terraform before connecting.

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Source: Published skill Original query: "Upstash Vector indexes must be created outside the SDK, dimension is fixed" Key terms: created, dimension, fixed, indexes, must, outside, upstash, vector

Source: Web adapter docs: documents the gotcha that an Upstash Vector index's dimension and similarity function are fixed at creation, and the SDK has no call to create an index. Agents that try to create the index in code will find no API for it; you must create it in the console, the developer API, or Terraform before connecting.

Verified resolution: Create the Upstash Vector index in the console or via API/Terraform first, choosing the dimension and similarity function deliberately since they are permanent. Verify the dimension matches your embedding model before writing any vectors; a mismatch fails every write.

Source URL: https://github.com/pungrumpy/vecstore-sdk/blob/HEAD/apps/web/content/docs/providers/upstash.mdx