Fhenix

Fhenix is a blockchain R&D company building confidential computing for EVM-compatible chains using Fully Homomorphic Encryption (FHE). Its CoFHE (FHE Coprocessor) lets Solidity smart contracts compute directly on encrypted data — encrypt inputs client-side, operate on ciphertexts on-chain via the FHE.sol Solidity libraries, and unseal results through a threshold decryption network, so sensitive state stays private without ever being decrypted on-chain. The developer stack is a smart-contract-plus-client-library surface (not a REST API): the cofhejs TypeScript SDK, Hardhat/Foundry plugins and starters, the fhenix-contracts Solidity libraries, and mock contracts for local testing. CoFHE is live on public testnets (Ethereum Sepolia, Arbitrum Sepolia, Base Sepolia) with mainnet planned. Fhenix is backed by Multicoin Capital.

Fhenix is profiled on the APIs.io network. Tagged areas include Company, Crypto Web3, Blockchain, Fully Homomorphic Encryption, and Confidential Computing.

Fhenix’s developer surface includes documentation, getting-started guide, engineering blog, support, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

17.8/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyCrypto Web3BlockchainFully Homomorphic EncryptionConfidential ComputingEthereumPrivacySmart ContractsWeb3DeFi

Kin Score

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

Composite quality — 17.8/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 8.3 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 2.7 / 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/fhenix: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: fhenix
name: Fhenix
description: 'Fhenix is a blockchain R&D company building confidential computing for EVM-compatible chains using Fully Homomorphic
  Encryption (FHE). Its CoFHE (FHE Coprocessor) lets Solidity smart contracts compute directly on encrypted data — encrypt
  inputs client-side, operate on ciphertexts on-chain via the FHE.sol Solidity libraries, and unseal results through a threshold
  decryption network, so sensitive state stays private without ever being decrypted on-chain. The developer stack is a smart-contract-plus-client-library
  surface (not a REST API): the cofhejs TypeScript SDK, Hardhat/Foundry plugins and starters, the fhenix-contracts Solidity
  libraries, and mock contracts for local testing. CoFHE is live on public testnets (Ethereum Sepolia, Arbitrum Sepolia, Base
  Sepolia) with mainnet planned. Fhenix is backed by Multicoin Capital.'
url: https://raw.githubusercontent.com/api-evangelist/fhenix/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
x-tier: stub
x-tier-reason: portfolio-lead
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://cdn.prod.website-files.com/6864e9aed9e0a3fac7810db8/68ad4072103ad564b44f3854_Slide%2016_9%20-%20145.jpg
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Crypto Web3
- Blockchain
- Fully Homomorphic Encryption
- Confidential Computing
- Ethereum
- Privacy
- Smart Contracts
- Web3
- DeFi
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://fhenix.io
- type: DeveloperPortal
  url: https://cofhe-docs.fhenix.zone/
- type: Documentation
  url: https://cofhe-docs.fhenix.zone/
- type: GettingStarted
  url: https://learn.fhenix.io/
- type: GitHubOrganization
  url: https://github.com/fhenixprotocol
- type: Blog
  url: https://www.fhenix.io/blog
- type: Support
  url: https://discord.com/invite/FuVgxrvJMY
- type: StatusPage
  url: https://status.fhenix.zone/
- type: Packages
  url: packages/fhenix-packages.yml
- type: SDKs
  url: packages/fhenix-packages.yml
- type: LLMsTxt
  url: llms/fhenix-llms.txt
- type: Lifecycle
  url: lifecycle/fhenix-lifecycle.yml
- type: DomainSecurity
  url: security/fhenix-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence