An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.

Packages
208
Total Downloads
7,903,005
Top 3.0% on hackage.haskell.org
scientific 0.3.8.1
Arbitrary-precision floating-point numbers represented using scientific notation
50 versions - Latest release: 2 months ago - 194 dependent packages - 1,596 dependent repositories - 412 thousand downloads total - 73 stars on GitHub - 3 maintainers
generically 0.1.1
2 versions - Latest release: about 3 years ago - 1 dependent package - 7 dependent repositories - 6.84 thousand downloads total - 2 maintainers
Top 1.1% on hackage.haskell.org
regex-base 0.93.2
This package does not provide the ability to do regular expression matching. Instead, it provides...
14 versions - Latest release: over 15 years ago - 19 dependent packages - 340 dependent repositories - 257 thousand downloads total - 4 maintainers
Top 0.3% on hackage.haskell.org
aeson 2.2.3.0
A JSON parsing and encoding library optimized for ease of use and high performance. To get start...
98 versions - Latest release: over 1 year ago - 720 dependent packages - 10,280 dependent repositories - 603 thousand downloads total - 1,288 stars on GitHub - 6 maintainers
Top 1.4% on hackage.haskell.org
cpphs 1.20.10
Cpphs is a re-implementation of the C pre-processor that is both more compatible with Haskell, an...
44 versions - Latest release: 6 months ago - 8 dependent packages - 201 dependent repositories - 242 thousand downloads total - 3 maintainers
Top 1.1% on hackage.haskell.org
parsec 3.1.11
Parsec is designed from scratch as an industrial-strength parser library. It is simple, safe, we...
27 versions - Latest release: almost 10 years ago - 222 dependent packages - 4,638 dependent repositories - 406 thousand downloads total - 832 stars on GitHub - 3 maintainers
attoparsec-aeson 2.2.2.0
A fast Haskell JSON library
4 versions - Latest release: almost 2 years ago - 24 dependent packages - 2 dependent repositories - 5.82 thousand downloads total - 1,226 stars on GitHub - 1 maintainer
Top 2.7% on hackage.haskell.org
attoparsec-iso8601 1.1.1.0
Parsing of ISO 8601 dates, originally from aeson.
7 versions - Latest release: almost 2 years ago - 4 dependent packages - 44 dependent repositories - 48.9 thousand downloads total - 1,226 stars on GitHub - 3 maintainers
text-iso8601 0.1.1
A fast Haskell JSON library
2 versions - Latest release: almost 2 years ago - 3 dependent packages - 1 dependent repositories - 4.52 thousand downloads total - 1,226 stars on GitHub - 1 maintainer
Top 0.9% on hackage.haskell.org
servant 0.20.2
51 versions - Latest release: over 1 year ago - 108 dependent packages - 711 dependent repositories - 87.6 thousand downloads total - 13 maintainers
Top 1.0% on hackage.haskell.org
postgresql-simple 0.6.5
74 versions - Latest release: over 3 years ago - 23 dependent packages - 924 dependent repositories - 107 thousand downloads total - 2 maintainers
Top 1.4% on hackage.haskell.org
servant-client 0.20.2
This library lets you derive automatically Haskell functions that let you query each endpoint of ...
46 versions - Latest release: over 1 year ago - 50 dependent packages - 454 dependent repositories - 56.6 thousand downloads total - 13 maintainers
Top 0.9% on hackage.haskell.org
resource-pool 0.5.0.0
A high-performance striped pooling abstraction for managing flexibly-sized collections of resourc...
17 versions - Latest release: 9 months ago - 33 dependent packages - 445 dependent repositories - 94.3 thousand downloads total - 5 maintainers
Top 1.3% on hackage.haskell.org
hscolour 1.24.4
26 versions - Latest release: over 8 years ago - 8 dependent packages - 357 dependent repositories - 130 thousand downloads total - 3 maintainers
Top 0.6% on hackage.haskell.org
regex-tdfa 1.3.2
This package provides a pure Haskell "Tagged" DFA regex engine for regex-base. This implementatio...
36 versions - Latest release: over 3 years ago - 74 dependent packages - 421 dependent repositories - 173 thousand downloads total - 6 maintainers
Top 6.4% on hackage.haskell.org
ansi-wl-pprint 1.0.2
This is a pretty printing library based on Wadler's paper "A Prettier Printer". It has been enhan...
21 versions - Latest release: almost 3 years ago - 50 dependent packages - 791 dependent repositories - 254 thousand downloads total - 9 stars on GitHub - 4 maintainers
months 0.2.1
Month, YearMonth, Quarter, YearQuarter
3 versions - Latest release: over 1 year ago - 739 downloads total - 2 stars on GitHub - 1 maintainer
Top 4.4% on hackage.haskell.org
servant-auth-server 0.4.9.1 💰
Servant is a Haskell DSL for describing, serving, querying, mocking, documenting web applications...
28 versions - Latest release: 8 months ago - 3 dependent packages - 51 dependent repositories - 18.6 thousand downloads total - 1,930 stars on GitHub - 12 maintainers
Top 1.1% on hackage.haskell.org
regex-compat 0.95.1
One module compat layer over regex-posix to replace Text.Regex. See also https://wiki.haskell.or...
10 versions - Latest release: almost 15 years ago - 37 dependent packages - 459 dependent repositories - 87.4 thousand downloads total - 4 maintainers
debruijn 0.3.1
4 versions - Latest release: 9 months ago - 218 downloads total - 1 maintainer
Top 4.4% on hackage.haskell.org
servant-auth 0.4.2.0 💰
Servant is a Haskell DSL for describing, serving, querying, mocking, documenting web applications...
14 versions - Latest release: over 1 year ago - 13 dependent packages - 45 dependent repositories - 14.1 thousand downloads total - 1,930 stars on GitHub - 12 maintainers
Top 6.7% on hackage.haskell.org
data-fix 0.3.4
Fixpoint data types
13 versions - Latest release: over 1 year ago - 20 dependent packages - 82 dependent repositories - 45.7 thousand downloads total - 20 stars on GitHub - 3 maintainers
vec-optics 0.4.1
Nat, Fin, Vec
3 versions - Latest release: almost 2 years ago - 763 downloads total - 25 stars on GitHub - 1 maintainer
dlist-nonempty 0.1.3
Difference lists are a list-like type supporting O(1) append. This is particularly useful for eff...
4 versions - Latest release: almost 3 years ago - 1 dependent package - 16 dependent repositories - 2.87 thousand downloads total - 4 stars on GitHub - 1 maintainer
Top 4.6% on hackage.haskell.org
semialign 1.3.1
An either-or-both data type, with corresponding hybrid error/writer monad transformer.
7 versions - Latest release: almost 2 years ago - 21 dependent packages - 48 dependent repositories - 32.9 thousand downloads total - 120 stars on GitHub - 1 maintainer
optics 0.4.2
7 versions - Latest release: almost 4 years ago - 9 dependent packages - 42 dependent repositories - 7.61 thousand downloads total - 4 maintainers
aws-lambda-runtime 0.0.0.1
Build AWS Lambda's with Haskell
2 versions - Latest release: about 6 years ago - 1.33 thousand downloads total - 11 stars on GitHub - 1 maintainer
generics-sop-lens 0.2.1
Lenses for types in generics-sop package
7 versions - Latest release: over 1 year ago - 20 dependent repositories - 5.6 thousand downloads total - 4 stars on GitHub - 1 maintainer
Top 5.4% on hackage.haskell.org
github 0.17.0
The GitHub API provides programmatic access to the full GitHub Web site, from Issues to Gists to ...
44 versions - Latest release: over 8 years ago - 3 dependent packages - 76 dependent repositories - 39 thousand downloads total - 429 stars on GitHub - 6 maintainers
monad-http 0.1.0.0
A class of monads which can do http requests
1 version - Latest release: about 10 years ago - 17 dependent repositories - 2.03 thousand downloads total - 4 stars on GitHub - 1 maintainer
functor-classes-compat 1.0.1
Data.Functor.Classes instances for core packages: containers This package used to provide insta...
5 versions - Latest release: about 5 years ago - 1 dependent package - 17 dependent repositories - 4.15 thousand downloads total - 3 stars on GitHub - 1 maintainer
strict-base-types 0.8.1
13 versions - Latest release: over 1 year ago - 2 dependent packages - 23 dependent repositories - 10.9 thousand downloads total - 8 stars on GitHub - 3 maintainers
servant-dhall 0.3
Servant Dhall bindings. Provides MimeRender and MimeUnrender instances. So you can accept and re...
4 versions - Latest release: about 6 years ago - 2.15 thousand downloads total - 7 maintainers
log-base 0.7.1
A library that provides a way to record structured log messages. Use this package in conjunction ...
18 versions - Latest release: almost 9 years ago - 6 dependent packages - 16 dependent repositories - 10.7 thousand downloads total - 38 stars on GitHub - 7 maintainers
Top 8.3% on hackage.haskell.org
servant-lucid 0.8.1
26 versions - Latest release: over 7 years ago - 2 dependent packages - 64 dependent repositories - 21.3 thousand downloads total - 10 maintainers
universe-instances-trans 1.1
Classes for types where we know all the values
3 versions - Latest release: almost 7 years ago - 17 dependent repositories - 3.25 thousand downloads total - 39 stars on GitHub - 2 maintainers
universe-dependent-sum 1.3.1
Classes for types where we know all the values
6 versions - Latest release: almost 2 years ago - 10 dependent repositories - 2.16 thousand downloads total - 39 stars on GitHub - 1 maintainer
Top 8.8% on hackage.haskell.org
insert-ordered-containers 0.3.0
Associative containers retaining insertion order for traversals. The implementation is based on ...
15 versions - Latest release: 7 days ago - 17 dependent packages - 96 dependent repositories - 30.1 thousand downloads total - 0 stars on GitHub - 2 maintainers
bound-extras 0.0.3
ScopeT and ScopeH
4 versions - Latest release: over 1 year ago - 1.33 thousand downloads total - 13 stars on GitHub - 1 maintainer
haskell-ci 0.18.1
21 versions - Latest release: about 2 years ago - 1 dependent package - 6.45 thousand downloads total - 2 maintainers
Top 8.4% on hackage.haskell.org
servant-multipart 0.12.1
Support for file uploads in multipart/form-data for servant
11 versions - Latest release: almost 5 years ago - 8 dependent packages - 39 dependent repositories - 14.3 thousand downloads total - 40 stars on GitHub - 9 maintainers
Top 8.6% on hackage.haskell.org
optics-extra 0.4.2
7 versions - Latest release: almost 4 years ago - 7 dependent packages - 16 dependent repositories - 21.5 thousand downloads total - 4 maintainers
base64-bytestring-type 1.0.1
A newtype around ByteString, for base64 encoding. Strict and lazy, normal and url alphabet variants.
2 versions - Latest release: almost 7 years ago - 1 dependent package - 11 dependent repositories - 15.4 thousand downloads total - 6 stars on GitHub - 2 maintainers
acme-operators 0.2.0.0
Operators of Haskell, all in one place!
2 versions - Latest release: over 10 years ago - 1.81 thousand downloads total - 2 stars on GitHub - 1 maintainer
debruijn-safe 0.3.1
4 versions - Latest release: 9 months ago - 186 downloads total - 1 maintainer
staged-gg 0.1
1 version - Latest release: about 5 years ago - 228 downloads total - 1 maintainer
Top 7.4% on hackage.haskell.org
lattices 2.2.1
Fine-grained lattice primitives for Haskell
20 versions - Latest release: almost 2 years ago - 9 dependent packages - 128 dependent repositories - 25.9 thousand downloads total - 37 stars on GitHub - 2 maintainers
travis-meta-yaml 0.1.0.0
.travis.yml preprocessor
3 versions - Latest release: over 10 years ago - 2.13 thousand downloads total - 6 stars on GitHub - 1 maintainer
spdx 1.1
Cabal provides SPDX types. This package provides some extras.
12 versions - Latest release: over 1 year ago - 2 dependent packages - 38 dependent repositories - 14.3 thousand downloads total - 5 stars on GitHub - 1 maintainer
Top 4.6% on hackage.haskell.org
assoc 1.1.1
5 versions - Latest release: almost 2 years ago - 8 dependent packages - 24 dependent repositories - 36.2 thousand downloads total - 1 maintainer
servant-conduit 0.16.1
4 versions - Latest release: over 1 year ago - 2 dependent packages - 18 dependent repositories - 2.76 thousand downloads total - 9 maintainers
servant-swagger-ui-redoc 0.3.5
Provide embedded swagger UI for servant and swagger
6 versions - Latest release: 11 months ago - 11 dependent repositories - 3.11 thousand downloads total - 48 stars on GitHub - 10 maintainers
th-letrec 0.1.1
2 versions - Latest release: about 2 years ago - 1 dependent package - 216 downloads total - 1 maintainer
ghc-symbol 0
1 version - Latest release: over 3 years ago - 146 downloads total - 1 maintainer
Top 7.8% on hackage.haskell.org
some 1.0.6
Existential type.
11 versions - Latest release: over 2 years ago - 20 dependent packages - 47 dependent repositories - 29.5 thousand downloads total - 37 stars on GitHub - 1 maintainer
Top 4.3% on hackage.haskell.org
binary-orphans 1.0.5
18 versions - Latest release: almost 2 years ago - 4 dependent packages - 48 dependent repositories - 41.5 thousand downloads total - 1 maintainer
aeson-compat 0.3.10
Compatibility layer for aeson
14 versions - Latest release: over 4 years ago - 3 dependent packages - 38 dependent repositories - 27.2 thousand downloads total - 4 stars on GitHub - 1 maintainer
cabal-install-parsers 0.6.3
16 versions - Latest release: 9 months ago - 4 dependent packages - 13 dependent repositories - 10.3 thousand downloads total - 1 maintainer
criterion-cmp 0.1.0.0
1 version - Latest release: about 5 years ago - 301 downloads total - 1 maintainer
Top 8.6% on hackage.haskell.org
Earley 0.10.0
See https://www.github.com/ollef/Earley for more information and https://github.com/ollef/Earley/...
18 versions - Latest release: over 10 years ago - 1 dependent package - 57 dependent repositories - 19.1 thousand downloads total - 2 maintainers
optics-vl 0.2.1
3 versions - Latest release: almost 6 years ago - 1 dependent package - 8 dependent repositories - 2.33 thousand downloads total - 4 maintainers
topograph 1.0.1
Directed Acyclic Graphs
4 versions - Latest release: almost 2 years ago - 2 dependent packages - 9 dependent repositories - 6.03 thousand downloads total - 20 stars on GitHub - 1 maintainer
servant-quickcheck 0.0.4
23 versions - Latest release: over 8 years ago - 9 dependent repositories - 12.3 thousand downloads total - 14 maintainers
puresat 0.1
Pure Haskell SAT solver
1 version - Latest release: over 1 year ago - 116 downloads total - 5 stars on GitHub - 1 maintainer
dec 0.0.6
Decidable propositions
4 versions - Latest release: almost 2 years ago - 4 dependent packages - 11 dependent repositories - 21.9 thousand downloads total - 4 stars on GitHub - 1 maintainer
Top 10.0% on hackage.haskell.org
cryptohash-md5 0.11.101.0
Fast, pure and practical MD5 implementation
5 versions - Latest release: over 4 years ago - 10 dependent packages - 60 dependent repositories - 41.4 thousand downloads total - 7 stars on GitHub - 2 maintainers
strict-optics 0.4.1
3 versions - Latest release: over 1 year ago - 632 downloads total - 8 stars on GitHub - 1 maintainer
Top 2.4% on hackage.haskell.org
cassava 0.5.5.0
cassava is a library for parsing and encoding RFC 4180 compliant comma-separated values (CSV) dat...
30 versions - Latest release: 16 days ago - 25 dependent packages - 451 dependent repositories - 79 thousand downloads total - 222 stars on GitHub - 4 maintainers
Top 6.4% on hackage.haskell.org
postgresql-libpq 0.8.2
Low-level Haskell bindings for libpq
33 versions - Latest release: almost 14 years ago - 12 dependent packages - 209 dependent repositories - 67.9 thousand downloads total - 20 stars on GitHub - 2 maintainers
postgresql-libpq-configure 0.11
Low-level Haskell bindings for libpq
3 versions - Latest release: over 1 year ago - 1 thousand downloads total - 20 stars on GitHub - 1 maintainer
postgresql-libpq-pkgconfig 0.11
Low-level Haskell bindings for libpq
2 versions - Latest release: over 1 year ago - 305 downloads total - 20 stars on GitHub - 1 maintainer
cryptohash-sha512 0.11.103.0
Fast, pure and practical SHA-512 implementation
4 versions - Latest release: 5 months ago - 3 dependent packages - 18 dependent repositories - 3.75 thousand downloads total - 3 stars on GitHub - 2 maintainers
Top 6.3% on hackage.haskell.org
servant-blaze 0.9.1
20 versions - Latest release: over 5 years ago - 5 dependent packages - 54 dependent repositories - 25.5 thousand downloads total - 11 maintainers
int-conv 1.0
Direct conversion functions between Ints and Words
1 version - Latest release: about 1 year ago - 45 downloads total - 2 stars on GitHub - 1 maintainer
waitra 0.0.4.0
Waitra is a very simple router. It's useful for writing simple API web-services, when you don't w...
4 versions - Latest release: over 10 years ago - 95 dependent repositories - 3.46 thousand downloads total - 3 stars on GitHub - 1 maintainer
Top 4.3% on hackage.haskell.org
swagger2 2.8.10
This library is intended to be used for decoding and encoding Swagger 2.0 API specifications as w...
44 versions - Latest release: 10 months ago - 17 dependent packages - 215 dependent repositories - 46.4 thousand downloads total - 74 stars on GitHub - 4 maintainers
hkd 0.2.1
"Higher-kinded data" utilities, e.g. and other classes and types. Note: this package is experim...
3 versions - Latest release: over 2 years ago - 1 dependent repositories - 1.34 thousand downloads total - 66 stars on GitHub - 2 maintainers
singleton-bool 0.1.8
Type level booleans
9 versions - Latest release: almost 2 years ago - 6 dependent packages - 31 dependent repositories - 30.5 thousand downloads total - 6 stars on GitHub - 1 maintainer
servant-swagger-ui-jensoleg 0.3.5
Provide embedded swagger UI for servant and swagger
5 versions - Latest release: 11 months ago - 1 dependent repositories - 2.3 thousand downloads total - 48 stars on GitHub - 10 maintainers
tdigest-Chart 0.2
Chart generation from tdigest.
2 versions - Latest release: almost 8 years ago - 10 dependent repositories - 1.86 thousand downloads total - 31 stars on GitHub - 1 maintainer
these-lens 1.0.2
An either-or-both data type, with corresponding hybrid error/writer monad transformer.
7 versions - Latest release: almost 2 years ago - 2 dependent packages - 13 dependent repositories - 2.93 thousand downloads total - 118 stars on GitHub - 1 maintainer
universe-reverse-instances 1.1.2
Classes for types where we know all the values
4 versions - Latest release: almost 2 years ago - 1 dependent package - 26 dependent repositories - 9.88 thousand downloads total - 39 stars on GitHub - 2 maintainers
flowdock-rest 0.1.0.0
Bindings to the Flowdock REST API. Currently there are only non-destructive operations. Also not...
1 version - Latest release: over 10 years ago - 1 dependent repositories - 1.02 thousand downloads total - 5 stars on GitHub - 1 maintainer
Top 8.9% on hackage.haskell.org
servant-auth-swagger 0.2.11.0 💰
Servant is a Haskell DSL for describing, serving, querying, mocking, documenting web applications...
9 versions - Latest release: over 1 year ago - 4 dependent packages - 15 dependent repositories - 6.26 thousand downloads total - 1,930 stars on GitHub - 12 maintainers
boring 0.2.2
Boring and Absurd types
8 versions - Latest release: almost 2 years ago - 6 dependent packages - 10 dependent repositories - 14.5 thousand downloads total - 17 stars on GitHub - 1 maintainer
Top 8.5% on hackage.haskell.org
integer-logarithms 1.0.5
Math.NumberTheory.Logarithms and Math.NumberTheory.Powers.Integer from the arithmoi package. Als...
9 versions - Latest release: 2 months ago - 15 dependent packages - 70 dependent repositories - 157 thousand downloads total - 6 stars on GitHub - 1 maintainer
servant-multipart-client 0.12.2
Support for file uploads in multipart/form-data for servant
2 versions - Latest release: over 2 years ago - 6 dependent packages - 11 dependent repositories - 3.07 thousand downloads total - 40 stars on GitHub - 9 maintainers
servant-http-streams 0.20.2
This library lets you derive automatically Haskell functions that let you query each endpoint of ...
10 versions - Latest release: over 1 year ago - 5 dependent repositories - 2.59 thousand downloads total - 9 maintainers
regression-simple 0.2.1
Simple linear and quadratic regression
4 versions - Latest release: almost 3 years ago - 1 dependent package - 1 dependent repositories - 997 downloads total - 6 stars on GitHub - 1 maintainer
log-elasticsearch 0.8.1
Elasticsearch back end for the log library suite. Depends on 'log-base'.
18 versions - Latest release: almost 9 years ago - 11 dependent repositories - 8.99 thousand downloads total - 38 stars on GitHub - 7 maintainers
monad-chronicle 1.0.2
An either-or-both data type, with corresponding hybrid error/writer monad transformer.
5 versions - Latest release: almost 2 years ago - 1 dependent package - 8 dependent repositories - 1.5 thousand downloads total - 118 stars on GitHub - 1 maintainer
generic-optics-lite 0.1.1
Lite version of generic-lens
2 versions - Latest release: almost 2 years ago - 626 downloads total - 7 stars on GitHub - 1 maintainer
universe 1.2.3
Classes for types where we know all the values
18 versions - Latest release: almost 2 years ago - 36 dependent repositories - 13 thousand downloads total - 39 stars on GitHub - 2 maintainers
Top 5.9% on hackage.haskell.org
lukko 0.1.2
6 versions - Latest release: almost 2 years ago - 6 dependent packages - 18 dependent repositories - 23.5 thousand downloads total - 1 maintainer
aeson-extra 0.5.1
Package provides extra functionality on top of aeson and aeson-compat
20 versions - Latest release: over 4 years ago - 3 dependent packages - 37 dependent repositories - 20.8 thousand downloads total - 4 stars on GitHub - 1 maintainer
binary-instances 1.0.6
Common Binary instances
8 versions - Latest release: 12 months ago - 4 dependent packages - 27 dependent repositories - 11.4 thousand downloads total - 1 stars on GitHub - 1 maintainer
codet-plugin 0.1.0.1
2 versions - Latest release: almost 2 years ago - 157 downloads total - 1 maintainer
Top 9.1% on hackage.haskell.org
cabal-doctest 1.0.12
As of now (end of 2024), there isn't cabal doctest command. Yet, to properly work, doctest needs ...
13 versions - Latest release: 4 months ago - 21 dependent repositories - 103 thousand downloads total - 31 stars on GitHub - 4 maintainers
universe-some 1.2.2
Classes for types where we know all the values
3 versions - Latest release: almost 2 years ago - 7 dependent repositories - 1.6 thousand downloads total - 39 stars on GitHub - 1 maintainer
these-optics 1.0.2
An either-or-both data type, with corresponding hybrid error/writer monad transformer.
5 versions - Latest release: almost 2 years ago - 6 dependent repositories - 1.56 thousand downloads total - 118 stars on GitHub - 1 maintainer
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