> For the complete documentation index, see [llms.txt](https://docs.substreams.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.substreams.dev/how-to-guides/hosted-services.md). # Hosted Services **Hosted Services** are managed Substreams deployments that StreamingFast runs for you on [The Graph Market](https://thegraph.market). You configure a service in the portal; StreamingFast provisions the runners, keeps them online, and scales them. You do not operate the sink process or the store server yourself. {% hint style="warning" %} Hosted Services are currently in beta. To stay up to date, join our [Discord](https://discord.gg/jZwqxJAvRs) and follow the **#announcements** channel. {% endhint %} There are two kinds of hosted service. Both are created from **Hosted Services** in The Graph Market — [create a new service](https://thegraph.market/sinks/new) or [list the ones you already have](https://thegraph.market/sinks). | Kind | What StreamingFast runs | What you bring | | ---------------- | ------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------- | | **Hosted Sink** | A Substreams sink that writes package output into a SQL database | A Postgres or ClickHouse database you already operate | | **Hosted Store** | A block-aware key/value store, queryable over gRPC and from Substreams modules | Values to store — either you push them, or a Substreams package reads the chain and fills the store | ## Hosted Sink A hosted sink continuously reads a Substreams package and writes the output into **your** Postgres or ClickHouse database. StreamingFast hosts the sink runner only. It does not create, host, or manage the database. Use a hosted sink when you want SQL in a database you already run (or a managed one such as Supabase, Neon, or ClickHouse Cloud) without operating `substreams-sink-sql` yourself. Supported engines are **PostgreSQL** and **ClickHouse**, in Database Changes Mode or Relational Mappings Mode. See [Substreams:SQL](/how-to-guides/sinks/sql.md). The database must be reachable from StreamingFast's network (a public hostname, not `localhost` or a private Docker name). **How-to:** [Hosted Sinks](/how-to-guides/hosted-services/hosted-sinks.md) — create a sink, connect Postgres or ClickHouse, then [manage it](/how-to-guides/hosted-services/hosted-sinks/manage-your-sink.md). Walkthroughs: [Supabase](/how-to-guides/hosted-services/hosted-sinks/supabase.md), [Neon](/how-to-guides/hosted-services/hosted-sinks/neon.md), [ClickHouse Cloud](/how-to-guides/hosted-services/hosted-sinks/clickhouse-cloud.md). If you would rather run the sink on your own infrastructure, see [Consuming Substreams](/how-to-guides/sinks.md). ## Hosted Store A hosted store is a managed, block-aware key/value map. Keys are raw bytes; values are protobuf messages. Reads target a block height, so a Substreams module that queries the store stays in sync with the stream. The create wizard offers two feed modes: | Mode | Who writes | When to use | How-to | | ------------------- | ------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- | | **Remote feed** | You (or another service) push and delete entries over gRPC with `Feed.Set` / `Feed.Delete` | Off-chain or application-owned data that Substreams should look up | [Remote Feed Hosted Store Guide](/how-to-guides/hosted-services/hosted-store-remote-feed.md) | | **Substreams feed** | A Substreams package reads the chain and populates the store | On-chain lookups other modules should reuse (the same idea as a [foundational store](/how-to-guides/composing-substreams/foundational-stores.md)) | [Substreams Feed Hosted Store Guide](/how-to-guides/hosted-services/hosted-store-substreams-feed.md) | Once deployed, the store is reachable at `.hs.streamingfast.io:443` and is referenced from a Substreams manifest as `foundational-store: @`. To run a foundational store yourself instead of using a StreamingFast-managed one, see [Hosting a Foundational Store](/reference-material/operators/hosting-foundational-stores.md). ## Create a service 1. Sign in to [The Graph Market](https://thegraph.market) with an organization. 2. Open [**Hosted Services**](https://thegraph.market/sinks) and click **New Service**. 3. Choose **Sink** or **Hosted Store**, then follow the wizard. An API key is created automatically for each deployment. Manage keys at . ## Related resources * [Hosted Sinks](/how-to-guides/hosted-services/hosted-sinks.md) — managed SQL sinks * [Remote Feed Hosted Store Guide](/how-to-guides/hosted-services/hosted-store-remote-feed.md) — write, delete, and read a hosted store over gRPC * [Substreams Feed Hosted Store Guide](/how-to-guides/hosted-services/hosted-store-substreams-feed.md) — populate a hosted store from a Substreams package * [Foundational Stores](/how-to-guides/composing-substreams/foundational-stores.md) — chain-specific stores populated by a Substreams package * [Consuming Substreams](/how-to-guides/sinks.md) — self-managed sinks (SQL, stream, PubSub, files, and community sinks)