# Yearn Finance

**Canonical:** https://apis.io/providers/yearn/  
**Website:** https://yearn.fi  
**APIs profiled:** 5

Yearn Finance is a DeFi yield aggregator that automates yield farming strategies across EVM-compatible networks. It provides REST and GraphQL APIs for accessing vault data, APY rates, strategy information, user positions, TVL metrics, and protocol analytics across Ethereum, Optimism, Polygon, Fantom, Base, and Arbitrum.

## Kin Score — 30.5 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 30.5).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 61.7 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 22.9 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free · Open access — onboarding: open, pricing: free, trial: no (confidence: medium).

## APIs (5)

- **Kong GraphQL API** — An integrated indexing service and GraphQL API providing comprehensive data on Yearn V2 and V3 vault ecosystems, including contract snapshots, event histories, vault-strategy re...
- **Yearn Finance Chains API** — Supported blockchain network information
- **Yearn Finance Info API** — Protocol information and metadata
- **Yearn Finance TVL API** — Total Value Locked metrics
- **Yearn Finance Vaults API** — Endpoints for querying Yearn vault data

## Agentic access (1)

- **Yearn Agentic Access** — 9 operations

## Security (1)

- **Yearn Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Plans**

## Tags

DeFi, Yield Aggregator, Vault, EVM, Web3, Blockchain, Finance

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