ShredPrism
Serialized Solana entries over the Jito ShredStream interface, delivered over gRPC with TLS from dedicated regions.
ShredPrism delivers serialized Solana entries over gRPC, from the block the leader is producing. It is the earliest view of Solana data that constant-k offers.
Compatibility and identity
ShredPrism serves the Jito ShredStream interface, shredstream.ShredstreamProxy/SubscribeEntries. A client written for Jito ShredStream connects unchanged, with the endpoint and the x-token metadata changed.
The interface is Jito's; the payload inside it is standard Solana entries. The protocol file is shredstream.proto in jito-labs/mev-protos.
ShredPrism combines shreds sourced from the fastest known shred providers with shreds from constant-k's own validator. Combining sources means a fragment missed by one can still arrive.
Endpoints
| Region | Host and port |
|---|---|
| New York | prism-newyork.constant-k.com:55577 |
| Frankfurt | prism-frankfurt.constant-k.com:55577 |
Connections must use TLS, with the API key in the x-token header. Your connection details appear on the My Account page once Nexus is active.
Delivery
| Property | Behaviour |
|---|---|
| Stage | Reassembly done; deserialization and everything after it belongs to the reader. See Data Stages. |
| Payload | Serialized entries, with the slot they belong to |
| Transport | gRPC over HTTP/2 with TLS, so data arrives in order and lost packets are retransmitted. A dropped UDP shred stream packet is gone without notice. |
| Content | Every transaction and every slot, unfiltered |
Each response carries a slot number and a byte string of serialized proof-of-history entries, each entry with its own transactions. Entries covers the layout, the decoders and the delivery properties of the feed, and the Quickstart has the service, method and metadata.
Access and limits
ShredPrism is included on Nexus. Limits apply per region.
| Limit | Nexus |
|---|---|
| Concurrent streams | One stream per key, in each region |
| Bandwidth limit | None |
| Per-request metering | None |
| Stream type | The full Solana feed over gRPC |
| Shred visibility | Pre-block, sub-slot |
A second stream on the same key in the same region is refused, and the stream you already hold keeps running. The status and its message are in the Quickstart troubleshooting table.
Related
ShredPrism carries serialized entries, deserialized and filtered by your own code. Turbo Kaldera carries decoded pre-execution transactions, already filtered, and Kaldera carries execution results. The service comparison sets the four streaming services side by side, and Data Stages places each one on the pipeline.