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graphql-rust/juniper

GraphQL server library for Rust
Source code at GitHub null
graphql-rust/juniper.json
{
  "createdAt": "2016-09-11T16:43:19Z",
  "defaultBranch": "master",
  "description": "GraphQL server library for Rust",
  "fullName": "graphql-rust/juniper",
  "homepage": null,
  "language": "Rust",
  "name": "juniper",
  "pushedAt": "2025-11-21T16:44:21Z",
  "stargazersCount": 5911,
  "topics": [
    "cargo",
    "graphql",
    "rust",
    "rust-library",
    "web"
  ],
  "updatedAt": "2025-11-26T21:55:18Z",
  "url": "https://github.com/graphql-rust/juniper"
}
Juniper

GraphQL server library for Rust

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[GraphQL][graphql] is a data query language developed by Facebook intended to serve mobile and web application frontends.

Juniper makes it possible to write GraphQL servers in Rust that are type-safe and blazingly fast. We also try to make declaring and resolving GraphQL schemas as convenient as Rust will allow.

Juniper does not include a web server - instead it provides building blocks to make integration with existing servers straightforward. It optionally provides a pre-built integration for the [Actix][actix], [Hyper][hyper], [Rocket], and [Warp][warp] frameworks, including embedded [Graphiql][graphiql] and [GraphQL Playground][playground] for easy debugging.

  • Cargo crate
  • [API Reference][docsrs]
  • [Book][book] !: Guides and Examples ([current][book] | [master][book_master])

The book is also available for the master branch and older versions published after 0.11.1. See the [book index][book_index].

Getting Started

Section titled “Getting Started”

The best place to get started is the [Juniper Book][book], which contains guides with plenty of examples, covering all features of Juniper. (very much WIP)

To get started quickly and get a feel for Juniper, check out the [Quickstart][book_quickstart] section.

For specific information about macros, types and the Juniper api, the [API Reference][docsrs] is the best place to look.

You can also check out the [Star Wars schema][test_schema_rs] to see a complex example including polymorphism with traits and interfaces. For an example of web framework integration, see the [actix][actix_examples], [axum][axum_examples], [hyper][hyper_examples], [rocket][rocket_examples], and [warp][warp_examples] examples folders.

Features

Section titled “Features”

Juniper supports the full GraphQL query language according to the [specification (October 2021)][graphql_spec], including interfaces, unions, schema introspection, and validations. It can also output the schema in the [GraphQL Schema Language][schema_language].

As an exception to other GraphQL libraries for other languages, Juniper builds non-null types by default. A field of type Vec<Episode> will be converted into [Episode!]!. The corresponding Rust type for e.g. [Episode] would be Option<Vec<Option<Episode>>>.

Juniper is agnostic to serialization format and network transport.

Juniper supports both asynchronous and synchronous execution using execute() and execute_sync() respectively. Asynchronous execution is runtime agnostic.

Juniper follows a [code-first approach][schema_approach] to defining GraphQL schemas. If you would like to use a [schema-first approach][schema_approach] instead, consider [juniper-from-schema][] for generating code from a schema file.

Integrations

Section titled “Integrations”

Data types

Section titled “Data types”

Juniper has automatic integration with some very common Rust crates to make building schemas a breeze. The types from these crates will be usable in your Schemas automatically.

  • [uuid][uuid]
  • [url][url]
  • [chrono][chrono]
  • [chrono-tz][chrono-tz]
  • [jiff][jiff]
  • [time][time]
  • [bson][bson]

Web Frameworks

Section titled “Web Frameworks”
  • [actix][actix]
  • [axum][axum]
  • [hyper][hyper]
  • [rocket][rocket]
  • [warp][warp]

Guides & Examples

Section titled “Guides & Examples”

API Stability

Section titled “API Stability”

Juniper has not reached 1.0 yet, thus some API instability should be expected.

[actix] !: https://actix.rs/ [axum] !: https://docs.rs/axum [graphql] !: http://graphql.org [graphiql] !: https://github.com/graphql/graphiql [playground] !: https://github.com/prisma/graphql-playground [graphql_spec] !: https://spec.graphql.org/October2021 [schema_language] !: https://graphql.org/learn/schema/#type-language [schema_approach] !: https://blog.logrocket.com/code-first-vs-schema-first-development-graphql/ [test_schema_rs] !: https://github.com/graphql-rust/juniper/blob/master/juniper/src/tests/fixtures/starwars/schema.rs [tokio] !: https://github.com/tokio-rs/tokio [actix_examples] !: https://github.com/graphql-rust/juniper/tree/master/juniper_actix/examples [axum_examples] !: https://github.com/graphql-rust/juniper/tree/master/juniper_axum/examples [hyper_examples] !: https://github.com/graphql-rust/juniper/tree/master/juniper_hyper/examples [rocket_examples] !: https://github.com/graphql-rust/juniper/tree/master/juniper_rocket/examples [hyper] !: https://hyper.rs [rocket] !: https://rocket.rs [book] !: https://graphql-rust.github.io/juniper [book_master] !: https://graphql-rust.github.io/juniper/master [book_index] !: https://graphql-rust.github.io/juniper [book_quickstart] !: https://graphql-rust.github.io/juniper/quickstart.html [docsrs] !: https://docs.rs/juniper [warp] !: https://github.com/seanmonstar/warp [warp_examples] !: https://github.com/graphql-rust/juniper/tree/master/juniper_warp/examples [uuid] !: https://crates.io/crates/uuid [url] !: https://crates.io/crates/url [chrono] !: https://crates.io/crates/chrono [chrono-tz] !: https://crates.io/crates/chrono-tz [jiff] !: https://crates.io/crates/jiff [time] !: https://crates.io/crates/time [bson] !: https://crates.io/crates/bson [juniper-from-schema] !: https://github.com/davidpdrsn/juniper-from-schema