the data plane for Stacks · launching May 27
The chain produces events. Applications need those events shaped, decoded, joined, delivered in ways no single API can anticipate. Today, every team building on Stacks rebuilds the same indexing infrastructure — running their own nodes, writing their own decoders, handling their own reorgs. That work is undifferentiated. It should be a utility, and we run it.
Five layers, each independently useful. Streams is the raw event firehose — cursor-paginated, idempotent, replayable. Index is the decoded transaction-level read API. Subgraphs let teams that outgrow public datasets define their own shape and deploy to a dedicated Postgres they can SSH into. Subscriptions push the rows that matter to your webhook. Pick the layer that matches your problem and ignore the rest.
On top of those layers we publish five Foundation Datasets — STX transfers, sBTC, PoX-4 stacking, BNS, and Network Health. Stable schemas, REST APIs, parquet bulk dumps, public freshness reporting. They are public goods, free forever. We monetize hosted infrastructure, not access to chain data.
Public APIs work today. Hobby tier and paid plans open May 27. Get the launch note — hi@secondlayer.tools.