Fei Protocol

Fei Protocol was an Ethereum-based decentralized finance (DeFi) protocol that launched in April 2021, introducing FEI, an algorithmic stablecoin backed by Protocol Controlled Value (PCV), alongside the TRIBE governance token. Founded by Joey Santoro, it merged with Rari Capital in December 2021 to form the Tribe DAO. Following the April 2022 Rari Fuse exploit, the Tribe DAO voted to wind down and dissolve the protocol later that year. Fei Protocol was backed by a16z (Andreessen Horowitz), Framework Ventures, and other investors. Its smart-contract code and documentation remain public on GitHub, but the protocol is no longer operational and its web properties (fei.money, docs.fei.money) are offline. Fei Protocol is an on-chain smart-contract system and exposes no public REST/HTTP API, so it carries no OpenAPI, SDK, or hosted API artifacts.

Fei Protocol is profiled on the APIs.io network. Tagged areas include Company, DeFi, Stablecoin, Ethereum, and Smart Contracts.

🌐 Visit website 📡 Source on GitHub

7.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyDeFiStablecoinEthereumSmart ContractsDAOCryptocurrencyBlockchainGovernance

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 7.4/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/fei-protocol: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Source (apis.yml)

aid: fei-protocol
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fei-protocol.png
name: Fei Protocol
description: Fei Protocol was an Ethereum-based decentralized finance (DeFi) protocol that launched in April 2021, introducing
  FEI, an algorithmic stablecoin backed by Protocol Controlled Value (PCV), alongside the TRIBE governance token. Founded
  by Joey Santoro, it merged with Rari Capital in December 2021 to form the Tribe DAO. Following the April 2022 Rari Fuse
  exploit, the Tribe DAO voted to wind down and dissolve the protocol later that year. Fei Protocol was backed by a16z (Andreessen
  Horowitz), Framework Ventures, and other investors. Its smart-contract code and documentation remain public on GitHub, but
  the protocol is no longer operational and its web properties (fei.money, docs.fei.money) are offline. Fei Protocol is an
  on-chain smart-contract system and exposes no public REST/HTTP API, so it carries no OpenAPI, SDK, or hosted API artifacts.
url: https://raw.githubusercontent.com/api-evangelist/fei-protocol/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- DeFi
- Stablecoin
- Ethereum
- Smart Contracts
- DAO
- Cryptocurrency
- Blockchain
- Governance
common:
- type: GitHubOrganization
  url: https://github.com/fei-protocol
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence