Sunscreen

Sunscreen is a cryptography company building the Secure Processing Framework (SPF) — an end-to-end platform for Fully Homomorphic Encryption (FHE) on blockchain. SPF lets web2 and web3 developers write programs, compile them to the Parasol FHE processor, and run them over encrypted data on-chain without ever exposing plaintext. The stack includes the open-source Sunscreen FHE/ZKP compiler (a family of Rust crates on crates.io), the Parasol processor runtime, a TypeScript SDK (@sunscreen/spf-client) and a Rust CLI for encrypting values, uploading FHE programs and ciphertexts, requesting threshold decryption, and managing on-chain access control (ACL). Founded by cryptographers and engineers from Nucypher, Microsoft, Meta, Tableau, Two Sigma and Caldera, and backed by Northzone.

Sunscreen is profiled on the APIs.io network. Tagged areas include Company, Infra Devtools, Fully Homomorphic Encryption, Cryptography, and Blockchain.

Sunscreen’s developer surface includes documentation, getting-started guide, engineering blog, support, CLI, authentication, changelog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

21.2/100 emerging ▬ flat Agent 10/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyInfra DevtoolsFully Homomorphic EncryptionCryptographyBlockchainWeb3PrivacyDeveloper ToolsFHE

Kin Score

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

Composite quality — 21.2/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 11.7 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 2.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 10/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 10 / 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/sunscreen: 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

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: sunscreen
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sunscreen.png
name: Sunscreen
description: Sunscreen is a cryptography company building the Secure Processing Framework (SPF) — an end-to-end platform for
  Fully Homomorphic Encryption (FHE) on blockchain. SPF lets web2 and web3 developers write programs, compile them to the
  Parasol FHE processor, and run them over encrypted data on-chain without ever exposing plaintext. The stack includes the
  open-source Sunscreen FHE/ZKP compiler (a family of Rust crates on crates.io), the Parasol processor runtime, a TypeScript
  SDK (@sunscreen/spf-client) and a Rust CLI for encrypting values, uploading FHE programs and ciphertexts, requesting threshold
  decryption, and managing on-chain access control (ACL). Founded by cryptographers and engineers from Nucypher, Microsoft,
  Meta, Tableau, Two Sigma and Caldera, and backed by Northzone.
url: https://raw.githubusercontent.com/api-evangelist/sunscreen/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- northzone
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Infra Devtools
- Fully Homomorphic Encryption
- Cryptography
- Blockchain
- Web3
- Privacy
- Developer Tools
- FHE
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://sunscreen.tech
- type: DeveloperPortal
  url: https://spf-docs.sunscreen.tech
- type: Documentation
  url: https://spf-docs.sunscreen.tech
- type: GettingStarted
  url: https://spf-docs.sunscreen.tech/docs/start
- type: Blog
  url: https://blog.sunscreen.tech
- type: GitHubOrganization
  url: https://github.com/Sunscreen-tech
- type: Support
  url: https://discord.gg/WHCs6jNNDS
- type: Packages
  url: packages/sunscreen-packages.yml
- type: SDKs
  url: packages/sunscreen-packages.yml
- type: CLI
  url: cli/sunscreen-cli.yml
- type: Authentication
  url: authentication/sunscreen-authentication.yml
- type: ChangeLog
  url: changelog/sunscreen-changelog.yml
- type: LLMsTxt
  url: llms/sunscreen-llms.txt
- type: DomainSecurity
  url: security/sunscreen-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 7
  pass: local-v1