Yield Protocol

Yield Protocol was a decentralized Ethereum protocol that brought fixed-rate, fixed-term borrowing and lending to DeFi via collateralized debt vaults and its YieldSpace automated market maker for fyTokens (fixed-yield tokens). Backed by Paradigm, the protocol reached a v2 implementation before winding down, and the yieldprotocol.com site now displays a closure notice. There is no REST/HTTP API surface; Yield Protocol is consumed on-chain through its Solidity smart contracts, with first-party developer libraries (vaults, interfaces, YieldSpace AMM, utility contracts) published to npm under the official @yield-protocol scope and source code maintained across the github.com/yieldprotocol organization. This profile was surfaced as a Paradigm portfolio company and enriched from public package and repository evidence.

Yield Protocol is profiled on the APIs.io network. Tagged areas include Company, Crypto Defi, DeFi, Ethereum, and Lending.

🌐 Visit website 📡 Source on GitHub
8.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyCrypto DefiDeFiEthereumLendingFixed RateSmart ContractsSolidity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 8.7/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 1.3 / 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/yield-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 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Yield Protocol Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

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

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: yield-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/yield-protocol.png
name: Yield Protocol
description: Yield Protocol was a decentralized Ethereum protocol that brought fixed-rate, fixed-term borrowing and lending
  to DeFi via collateralized debt vaults and its YieldSpace automated market maker for fyTokens (fixed-yield tokens). Backed
  by Paradigm, the protocol reached a v2 implementation before winding down, and the yieldprotocol.com site now displays a
  closure notice. There is no REST/HTTP API surface; Yield Protocol is consumed on-chain through its Solidity smart contracts,
  with first-party developer libraries (vaults, interfaces, YieldSpace AMM, utility contracts) published to npm under the
  official @yield-protocol scope and source code maintained across the github.com/yieldprotocol organization. This profile
  was surfaced as a Paradigm portfolio company and enriched from public package and repository evidence.
url: https://raw.githubusercontent.com/api-evangelist/yield-protocol/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- paradigm
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Crypto Defi
- DeFi
- Ethereum
- Lending
- Fixed Rate
- Smart Contracts
- Solidity
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://yieldprotocol.com
- type: GitHubOrganization
  url: https://github.com/yieldprotocol
- type: Packages
  url: packages/yield-protocol-packages.yml
- type: SDKs
  url: packages/yield-protocol-packages.yml
- type: DomainSecurity
  url: security/yield-protocol-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 2
  pass: local-v1