Cloudflare KV Has a Free API You Should Know About

Cloudflare KV is a global key-value store designed for read-heavy workloads at the edge. Store configuration, feature flags, and static data that's available in milliseconds worldwide.

Why KV for Edge Applications

A developer needed to serve feature flags to users globally. Redis added 50ms+ latency from centralized servers. Cloudflare KV serves data from the nearest edge location — sub-millisecond reads everywhere.

Key Features:

• Global Distribution — Data replicated to 300+ edge locations
• Sub-Millisecond Reads — Served from nearest edge
• Eventually Consistent — Writes propagate globally in ~60 seconds
• Large Values — Up to 25MB per value
• Free Tier — 100K reads/day, 1K writes/day

Quick Start

// wrangler.toml
// [[kv_namespaces]]
// binding = "MY_KV"
// id = "your-namespace-id"

export default {
  async fetch(request, env) {
    // Write
    await env.MY_KV.put("user:123", JSON.stringify({ name: "Alice" }))

    // Read
    const user = await env.MY_KV.get("user:123", "json")
    return Response.json(user)
  }
}

With Expiration

// Expires in 1 hour
await env.MY_KV.put("session:abc", token, { expirationTtl: 3600 })

List Keys

const { keys } = await env.MY_KV.list({ prefix: "user:" })

Why Choose Cloudflare KV

1. Global by default — data near every user
2. Simple API — get, put, delete, list
3. Free tier — 100K reads/day

Check out KV docs to get started.

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Need edge solutions? Check out my Apify actors or email [e-mail] for custom solutions.