# Yield Protocol

**Canonical:** https://apis.io/providers/yield-protocol/  
**Website:** https://yieldprotocol.com  
**APIs profiled:** 0

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.

## Kin Score — 6.8 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 6.8).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 7.1 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Yield Protocol Domain Security** — TLSv1.3 · HSTS

## Tags

Company, Crypto Defi, DeFi, Ethereum, Lending, Fixed Rate, Smart Contracts, Solidity

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/yield-protocol/). Scores are computed from the provider's own public artifacts under a published rubric.