# eclipse-biscuit/biscuit

delegated, decentralized, capabilities based authorization token

Repository: https://github.com/eclipse-biscuit/biscuit
Canonical: https://ross.abutalabs.com/products/eclipse-biscuit-biscuit
Language: Rust
License: Apache-2.0
License Family: permissive
Last push: 2025-10-21T14:58:11+00:00

## Health v2 (maintenance only)
Score: 44/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 48, release rhythm 8, longevity 100
- inputs: {"age_days": 2795, "days_push": 316, "days_rel": 624, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1142, forks 33 (observed 2026-08-28T04:03:44.752478+00:00)

## What it is
Biscuit is a specification and reference implementation for a delegated, decentralized, capability-based authorization token, written in Rust. Tokens can be created, attenuated (restricted), and verified offline using cryptographic signatures and a Datalog-based policy language.

## Use cases
- issue delegated authorization tokens with offline verification
- attenuate tokens to restrict permissions for downstream services
- replace JWTs with revocable, capability-based tokens
- implement decentralized access control across microservices
- add third-party blocks to tokens for multi-party authorization

## When to choose
- you need decentralized authorization without a central token introspection service
- you want tokens that can be safely attenuated by holders
- you need offline verification of credentials and policies

## When to avoid
- you only need simple session cookies or basic JWT workflows
- your stack relies on a language without a mature Biscuit implementation (e.g. Go lacks v3.1+ features)
- you require a formally audited security design (audit is still pending)

## Facets
- artifact type: library
- maturity: active
- function: auth, authorization, cryptography, serialization
- domain: security, apis, developer-tools
- platform: rust, cross-platform
- tags: biscuit-tokens, capability-tokens, decentralized-authorization, token-attenuation, datalog

## Member repositories
- eclipse-biscuit/biscuit (main) score 44

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:44.752478+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 2026-08-30T06:35:05.239672+00:00, confidence not recorded.
  - readme: https://github.com/eclipse-biscuit/biscuit (fetched 2026-08-28T04:03:44.752478+00:00, sha cd36b3957380)
- Data as of 2026-08-30T08:39:29.467469+00:00.