Vesper Finance

Vesper Finance is a DeFi yield aggregator that enables users to deposit assets into managed pools where yield strategies automatically optimize returns across decentralized finance protocols. The platform provides REST APIs for querying pool performance metrics, APY data, strategy information, VSP token statistics, and historical value-locked data across Ethereum, Polygon, Avalanche, and Optimism.

Vesper Finance publishes 4 APIs on the APIs.io network, including Pools API, Rates API, TVL API, and 1 more. Tagged areas include DeFi, Yield Aggregator, Liquidity Pools, APY, and Staking.

The Vesper Finance catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Vesper Finance’s developer surface includes documentation, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.9/100 thin ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessFreeOpen⚡ Free to try

6 APIs

DeFiYield AggregatorLiquidity Pools APY StakingVSP TokenEthereum Polygon Avalanche Optimism

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 32.9/100 · thin

Contract Quality 14.8 / 25

Developer Ergonomics 3.3 / 20

Access Clarity 5.8 / 20

Operational Transparency 0.3 / 13

Contract Governance 1.2 / 12

Discoverability 7.4 / 10

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

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

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

GraphQL 1

GraphQL schemas published by this provider.

Rate Limits 1

Documented rate limits and quota policies.

Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

Examples 2

Example request and response payloads for these APIs.

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

PoolMetadata

PoolMetadata

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

JavaScriptLibrary

JavaScriptLibrary

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Discord

Discord

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 3

The organization behind the API

Website

Website

Blog

Blog

Twitter

Twitter

Source (apis.yml)

name: Vesper Finance
description: Vesper Finance is a DeFi yield aggregator that enables users to deposit assets into managed pools where yield
  strategies automatically optimize returns across decentralized finance protocols. The platform provides REST APIs for querying
  pool performance metrics, APY data, strategy information, VSP token statistics, and historical value-locked data across
  Ethereum, Polygon, Avalanche, and Optimism.
accessModel:
  pricing: free
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Free · Open access
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/vesper.png
url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/apis.yml
created: '2026-06-14'
modified: '2026-06-14'
specificationVersion: '0.23'
tags:
- DeFi
- Yield Aggregator
- Liquidity Pools
- APY
- Staking
- VSP Token
- Ethereum
- Polygon
- Avalanche
- Optimism
apis:
- name: Vesper Contracts API Reference
  description: Smart contract interface reference for Vesper pools, strategies, PoolAccountant, PoolRewards, and related on-chain
    components enabling direct DeFi integration via Web3.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.vesper.finance/vesper-developers/vesper-contracts-api-reference
  baseURL: https://api.vesper.finance
  tags:
  - Smart Contracts
  - Web3
  - ERC-20
  - DeFi
  tags_raw:
  - Smart Contracts
  - Web3
  - ERC20
  - DeFi
  properties:
  - type: Documentation
    url: https://docs.vesper.finance/vesper-developers/vesper-contracts-api-reference
  - type: GitHubRepository
    url: https://github.com/vesperfi/vesper-contracts
  contact:
  - FN: Vesper Finance
    url: https://vesper.finance/
- name: Vesper Subgraph API
  description: GraphQL subgraph for querying Vesper Finance on-chain events, pool history, strategy performance, and token
    metrics via The Graph protocol.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://github.com/vesperfi/vesper-subgraph
  baseURL: https://api.thegraph.com/subgraphs/name/vesperfi
  tags:
  - GraphQL
  - Subgraph
  - The Graph
  - Historical Data
  properties:
  - type: Documentation
    url: https://github.com/vesperfi/vesper-subgraph
  - type: GitHubRepository
    url: https://github.com/vesperfi/vesper-subgraph
  - url: graphql/vesper-graphql.md
    type: GraphQL
  contact:
  - FN: Vesper Finance
    url: https://vesper.finance/
- aid: vesper:vesper-pools-api
  name: Vesper Finance Pools API
  description: Vesper Grow Pool data and metadata
  humanURL: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  baseURL: https://api.vesper.finance
  tags:
  - Pools
  properties:
  - type: OpenAPI
    url: openapi/vesper-pools-api-openapi.yml
  - type: Documentation
    url: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  - type: GitHubRepository
    url: https://github.com/vesperfi/doc
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/finops/finops.yml
- aid: vesper:vesper-rates-api
  name: Vesper Finance Rates API
  description: APY, APR, and lending rate data
  humanURL: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  baseURL: https://api.vesper.finance
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/vesper-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  - type: GitHubRepository
    url: https://github.com/vesperfi/doc
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/finops/finops.yml
- aid: vesper:vesper-tvl-api
  name: Vesper Finance TVL API
  description: Total value locked metrics
  humanURL: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  baseURL: https://api.vesper.finance
  tags:
  - TVL
  properties:
  - type: OpenAPI
    url: openapi/vesper-tvl-api-openapi.yml
  - type: Documentation
    url: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  - type: GitHubRepository
    url: https://github.com/vesperfi/doc
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/finops/finops.yml
- aid: vesper:vesper-vsp-api
  name: Vesper Finance VSP API
  description: VSP token statistics and staking data
  humanURL: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  baseURL: https://api.vesper.finance
  tags:
  - VSP
  properties:
  - type: OpenAPI
    url: openapi/vesper-vsp-api-openapi.yml
  - type: Documentation
    url: https://docs.vesper.finance/vesper-developers/vesper-developers-guide
  - type: GitHubRepository
    url: https://github.com/vesperfi/doc
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/vesper/refs/heads/main/finops/finops.yml
common:
- type: License
  name: MIT
  url: https://github.com/vesperfi/vesper-contracts/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/vesper-agentic-access.yml
- type: DomainSecurity
  url: security/vesper-domain-security.yml
- type: Website
  url: https://vesper.finance/
- type: Documentation
  url: https://docs.vesper.finance/
- type: GitHubOrganization
  url: https://github.com/vesperfi
- type: JavaScriptLibrary
  url: https://github.com/vesperfi/lib-js
- type: Blog
  url: https://medium.com/vesperfinance
- type: Discord
  url: https://discord.gg/vesperfinance
- type: Twitter
  url: https://twitter.com/VesperFi
- type: PoolMetadata
  url: https://github.com/vesperfi/metadata
maintainers:
- FN: API Evangelist
  url: https://apievangelist.com
  email: info@apievangelist.com

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/vesper"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/vesper/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/vesper/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.