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KV · 3 November 2026

Cloudflare Workers KV API

KV stores now accept Cloudflare's Workers KV REST API at /compat/cloudflare/client/v4, so code that uses Cloudflare's SDKs runs against Runtime KV after you change only the base URL and the API token: set baseURL to https://<your API host>/compat/cloudflare/client/v4, apiToken to a Runtime API key, and use a KV store's ID as the namespace ID. Reading, writing and deleting a value, and listing keys with prefix, limit and cursor, are supported. A request that sets expiration or metadata returns 400 with a message naming the unsupported parameter; bulk operations and namespace management are not yet available and return 404.

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