graphql: Haskell GraphQL implementation

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This package provides a rudimentary parser for the GraphQL language.

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Versions 0.1, 0.2, 0.2.1, 0.3,,,,,,,,,,,,,,,,,,,,,,,
Change log
Dependencies aeson (>= && <1.5), base (>=4.7 && <5), containers (>= && <0.7), megaparsec (>=8.0.0 && <8.1), parser-combinators (>=1.2.1 && <1.3), text (>= && <1.3), transformers (>= && <0.6), unordered-containers (>= && <0.3) [details]
License BSD-3-Clause
Copyright (c) 2019-2020 Eugen Wissner, (c) 2015-2017 J. Daniel Navarro
Author Danny Navarro <>, Matthías Páll Gissurarson <>, Sólrún Halla Einarsdóttir <>
Category Language
Home page
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Source repo head: git clone
Uploaded by belka at 2020-05-11T11:21:11Z


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Haskell GraphQL

Hackage Version Build Status License

GraphQL implementation in Haskell.

This implementation is relatively low-level by design, it doesn't provide any mappings between the GraphQL types and Haskell's type system and avoids compile-time magic. It focuses on flexibility instead, so other solutions can be built on top of it.

State of the work

For now this only provides a parser and a printer for the GraphQL query language and allows to execute queries and mutations without the schema validation step. But the idea is to be a Haskell port of graphql-js.

For the list of currently missing features see issues marked as "not implemented".


API documentation is available through Hackage.

You'll also find a small tutorial with some examples under docs/tutorial.

Further information


Suggestions, contributions and bug reports are welcome.

Should you have questions on usage, please open an issue and ask – this helps to write useful documentation.

Feel free to contact on Slack in #haskell on GraphQL. You can obtain an invitation here.