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name: k2 description: Build and troubleshoot Cloudflare K2 or K2 Streams durable logs. Use for stream setup, producing from Workers or HTTP, configuring retention and inputs, and consuming through subscriptions. license: Apache-2.0

Cloudflare K2

K2 is a durable log for decoupling event producers and consumers. Start with the K2 overview, then retrieve the relevant current documentation before giving setup instructions, code, limits, availability, permissions, or API details. The docs are the source of truth over this skill. While cloudflare-docs PR #33858 remains open, use its proposed pages if the public URLs have not been published.

Documentation

Task	Docs	Check for
Create a stream and try K2	Get started	Prerequisites, setup sequence, current API examples
Understand streams and subscriptions	Concepts	Record model and delivery behavior
Configure a stream	Configuration	Inputs, authentication, CORS, retention
Produce from HTTP or a Worker	Produce records	Request and binding syntax, encoding, errors, retries
Consume through subscriptions	Consume records	Leases, acknowledgements, retries, errors
Size a stream or consumer	Limits	Current quotas and size limits

Retrieve the matching pages above for each task and use their current examples. For capacity or cost questions, check current limits and any published pricing before quoting values. State when a requested pricing or availability detail is not yet published.

For SQL transformation and delivery to R2 Iceberg tables, use the basin skill. For task processing, consult Queues.