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$ status: in development — early access open

Stop polling. Subscribe to the query.

Hermes lets you subscribe to a SQL query the way you'd subscribe to a topic. Materialize keeps the view incrementally up to date; Hermes pushes every change to you over WebSocket the moment it happens. Written in Go, because the gateway is the worst possible place to be slow.

View on GitHub

// one subscription, results forever let stream = hermes.subscribe({ query: "SELECT * FROM crypto_trades WHERE volume > 1000", format: "json", transport: "websocket" }); // → rows arrive as the data changes, not when you ask

Four stages, one pipeline

Hermes sits between everything that produces data and everything that wants it.

ingest

Tendryl → RedPanda

Rust connectors stream market data, chain events, and user activity into durable topics; hot finance paths land in QuestDB for tick-level replay.

process

Materialize

Incremental view maintenance: SQL queries stay continuously correct.

route

Hermes gateway

Go + chi: auth, rate limits, and delivery over WebSocket, REST, gRPC, or SSE.

consume

Your clients

Versal, Delt, Jacynth, and anything external with a JWT.

The parts that earn their keep

Streaming SQLSubscribe to queries, not tables. Materialize recomputes only what changed, so a million-row view updates in milliseconds.
Go + chiGoroutine-based concurrency, efficient serialization, backpressure-aware flow control. The gateway adds microseconds, not milliseconds.
WebSocket done rightAutomatic reconnection, heartbeat monitoring, and per-connection backpressure so a slow consumer can't sink the pipeline.
Gateway dutiesCharon JWT validation, per-user rate limiting, request routing, and response transformation for every CC service.
Event-driven coreEvent sourcing and CQRS with Kafka/RedPanda durability and exactly-once processing guarantees.
Multi-protocolREST, WebSocket, gRPC, and Server-Sent Events with automatic protocol negotiation. Pick per use case, not per platform.

Already carrying the platform

Versal takes price feeds, order books, and execution updates for the terminal. Jacynth runs its AI-generated queries through Hermes and streams results to live dashboards. Delt gets portfolio updates, price alerts, and trade notifications in the mobile app. Tendryl feeds the whole thing from exchange APIs and blockchain nodes via Rust connectors.

Pricing

$10/mo

as an add-on to any Colossal Capital tier; the tier sets streaming capacity, API limits, and team size. Sign up at the keys portal · tier details