# atsign-foundation/at_client_sdk

The Dart implementation of atSDK used for implementing Atsign's technology into other software

Repository: https://github.com/atsign-foundation/at_client_sdk
Canonical: https://ross.abutalabs.com/products/at_client_sdk
Homepage: https://pub.dev/publishers/atsign.org/packages
Language: Dart
License: BSD-3-Clause
License Family: permissive
Topics: sdk, client, mobile, dart, flutter, hacktoberfest, atsign
Last push: 2026-08-26T18:40:06+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 2136, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1437, forks 31 (observed 2026-08-28T04:04:43.719334+00:00)

## What it is
The Dart implementation of the atSDK for building applications on the Atsign Platform, a protocol for personal data ownership and controlled sharing. It provides the core client SDK, Flutter layers, and supporting libraries for authentication, cryptography, and protocol communication.

## Use cases
- build mobile apps on the atProtocol
- add Atsign authentication and onboarding to a Flutter app
- encrypt and sign data with at_chops
- implement end-to-end encrypted data sharing between users
- build CLI or IoT clients that talk to atProtocol servers
- manage contacts across Atsign Platform apps

## When to choose
- you are building Dart or Flutter apps that integrate with the Atsign Platform
- you need user-owned, end-to-end encrypted data exchange without a backend
- you want platform-neutral Dart SDK support for CLI, headless services, or IoT devices

## When to avoid
- you need a general-purpose backend framework or database
- your project does not use Dart or Flutter and you need a different language binding
- you need Flutter web support, which is not a supported target

## Facets
- artifact type: library
- maturity: active
- function: sdk, auth, cryptography, http-client
- domain: developer-tools, privacy, mobile-development, cross-platform, networking
- platform: cross-platform, windows, cli
- tags: atsign, atprotocol, data-ownership, flutter, pub-dev, decentralized-identity, android, ios, macos, linux

## Member repositories
- atsign-foundation/at_client_sdk (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:43.719334+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:36:43.099292+00:00, confidence not recorded.
  - readme: https://github.com/atsign-foundation/at_client_sdk (fetched 2026-08-28T04:04:43.719334+00:00, sha 2250b94020c1)
  - homepage: https://pub.dev/publishers/atsign.org/packages (fetched 2026-08-29T11:47:21.209311+00:00, sha 3fd086aa9e33)
- Data as of 2026-08-30T08:39:29.467469+00:00.