# Firehose

**Canonical:** https://apis.io/apis/the-graph/firehose/  
**Provider:** The Graph — https://apis.io/providers/the-graph/  
**Base URL:** varies per chain  
**Documentation:** https://thegraph.com/docs/en/substreams/firehose/

Firehose is one of 6 APIs that [The Graph](https://apis.io/providers/the-graph/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include gRPC and Streaming. The published artifact set on APIs.io includes API documentation.

Open-source flat-file extraction layer that powers Substreams. Provides chain-specific gRPC streams of blocks and transactions.

## Machine-readable artifacts (1)

- **Documentation** — https://thegraph.com/docs/en/substreams/firehose/

## Other The Graph APIs (5)

- [The Graph Subgraphs (GraphQL)](https://apis.io/apis/the-graph/subgraphs/)
- [The Graph Token API](https://apis.io/apis/the-graph/token-api/)
- [The Graph Substreams](https://apis.io/apis/the-graph/substreams/)
- [Graph Node Admin JSON-RPC (self-hosted)](https://apis.io/apis/the-graph/graph-node-rpc/)
- [The Graph Subgraphs API](https://apis.io/apis/the-graph/the-graph-subgraphs-api/)

## Tags

gRPC, Streaming

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/the-graph/firehose/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/the-graph/.