Programming language: Go
License: Apache License 2.0
Latest version: v1.1.14

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openflagr/flagr is a community-driven OSS effort of advancing the development of Flagr.

Flagr is an open source Go service that delivers the right experience to the right entity and monitors the impact. It provides feature flags, experimentation (A/B testing), and dynamic configuration. It has clear swagger REST APIs for flags management and flag evaluation.


Quick demo

Try it with Docker.

# Start the docker container
docker pull ghcr.io/openflagr/flagr
docker run -it -p 18000:18000 ghcr.io/openflagr/flagr

# Open the Flagr UI
open localhost:18000

<!-- TODO: change a new demo flagr website --> Or try it on https://try-openflagr.herokuapp.com, it may take a while for a cold start.

curl --request POST \
     --url https://try-openflagr.herokuapp.com/api/v1/evaluation \
     --header 'content-type: application/json' \
     --data '{
       "entityID": "127",
       "entityType": "user",
       "entityContext": {
         "state": "NY"
       "flagID": 1,
       "enableDebug": true

Flagr Evaluation Performance

Tested with vegeta. For more details, see [benchmarks](./benchmark).

Requests      [total, rate]            56521, 2000.04
Duration      [total, attack, wait]    28.2603654s, 28.259999871s, 365.529µs
Latencies     [mean, 50, 95, 99, max]  371.632µs, 327.991µs, 614.918µs, 1.385568ms, 12.50012ms
Bytes In      [total, mean]            23250552, 411.36
Bytes Out     [total, mean]            8308587, 147.00
Success       [ratio]                  100.00%
Status Codes  [code:count]             200:56521
Error Set:

Flagr UI

Client Libraries

Language Clients
Go goflagr
Javascript jsflagr
Python pyflagr
Ruby rbflagr

License and Credit

*Note that all licence references and agreements mentioned in the Flagr README section above are relevant to that project's source code only.