Protobuf Global Extension Registry

This file contains a global registry of known extensions for descriptor.proto, so that any developer who wishes to use multiple 3rd party projects, each with their own extensions, can be confident that there won't be collisions in extension numbers.

If you need an extension number for your custom option (see custom options), please send us a pull request to add an entry to this doc, or create an issue with info about your project (name and website) so we can add an entry for you.

Existing Registered Extensions

  1. C# port of protocol buffers

  2. Perl/XS port of protocol buffers

  3. Objective-C port of protocol buffers

  4. Google Wave Federation Protocol open-source release (FedOne)

  5. PHP code generator plugin

    • Website: ???
    • Extensions: 1004

  6. GWT code generator plugin (third-party!)

  7. Unix Domain RPC code generator plugin

  8. Object-C generator plugin (Plausible Labs)

  9. TBD (code42.com)

    • Website: ???
    • Extensions: 1008

  10. Goby Underwater Autonomy Project

  11. Nanopb

  12. Bluefin AUV Communication Extensions

  13. Dynamic Compact Control Language

  14. ScaleOut StateServer® Native C++ API

  15. FoundationDB SQL Layer

  16. Fender

  17. Vortex

  18. tresorit

  19. CRIU (Checkpoint Restore In Userspace)

  20. protobuf-c

  21. ScalaPB

  22. protoc-gen-bq-schema

  23. grpc-gateway

  24. Certificate Transparency

  25. JUNOS Router Telemetry

  26. Spine Event Engine

  27. Aruba cloud platform

    • Website: ???
    • Extensions: 1026 -> 1030

  28. Voltha

    • Website: ???
    • Extensions: 1031 -> 1033

  29. gator

    • Website: ???
    • Extensions: 1034

  30. protoc-gen-flowtypes

  31. ProfaneDB

  32. protobuf-net

  33. FICO / StreamEngine

  34. GopherJS

  35. ygot

  36. go-grpcmw

  37. grpc-gateway protoc-gen-swagger

  38. AN Message

    • Website: TBD
    • Extensions: 1043

  39. protofire

  40. Gravity

  41. SEMI Standards – I&C Technical Committee

  42. Elixir plugin

  43. API client generators

    • Website: ???
    • Extensions: 1048-1056

  44. Netifi Proteus

  45. CGSN Mooring Project

  46. Container Storage Interface

  47. TwirpQL Plugin

  48. Protoc-gen-validate

  49. Protokt

  50. Dart port of protocol buffers

  51. Ocaml-protoc-plugin

  52. Analyze Re Graphene

  53. Wire since and until

  54. Bazel, Failure Details

  55. grpc-graphql-gateway

  56. Cloudstate

  57. SummaFT protoc-plugins

  58. ADLINK EdgeSDK

  59. Wire wire_package

  60. Confluent Schema Registry

  61. ScalaPB Validate

  62. Astounding (Currently Private)

  63. Protoc-gen-psql

  64. Protoc-gen-sanitize

  65. Coach Client Connect (planned release in March 2021)

  66. Kratos API Errors

  67. Glitchdot (Currently Private)

  68. eigr/protocol

  69. Container Object Storage Interface (COSI)

  70. Protoc-gen-jsonschema

  71. Protoc-gen-checker

  72. Protoc-gen-go-svc

  73. Embedded Proto

  74. Protoc-gen-fieldmask

  75. Google Gnostic

  76. Protoc-gen-go-micro

  77. Protoc-gen-authz

  78. Protonium

  79. Protoc-gen-xo

  80. Ballerina gRPC

  81. Protoc-gen-referential-integrity

  82. Oclea Service Layer RPC

  83. mypy-protobuf

  84. Pigweed protobuf compiler

  85. Perfetto

  86. Buf

  87. Connect RPC

  88. protocel

  89. Cybozu

  90. EngFlow

  91. Proto-telemetry

  92. Digital Twins Definition Language (DTDL)

  93. RabbitMQ

  94. Wire use_array

  95. Protons

  96. gRPC Federation

  97. protoc-gen-openapi

  98. Wire enumMode

  99. Nebius AI

  100. Buf

  101. userver

  102. protoc-gen-default / protoc-gen-env (confpb)

  103. JaiaBot