Sommelier

Sommelier (rebranding to "Somm") is a decentralized asset-management and DeFi vault protocol whose smart-contract "cellars" run automated yield strategies on Ethereum. It publishes a public, read-only HTTP API that exposes on-chain vault performance data — daily and hourly snapshots (APY, TVL, share price, total assets), protocol-wide total value locked, per-cellar snapshots, and integration datasets for Kelp and ether.fi points and balances. All endpoints are unauthenticated GET requests with path-based parameters and a { "Response": ... } envelope; the API currently serves the ethereum network. Backed by Multicoin Capital.

Sommelier is listed with 3 APIs on the APIs.io network: Integrations API, Protocol API, and Vault Data API. Tagged areas include Company, Web3, DeFi, Blockchain, and Ethereum.

The Sommelier catalog on APIs.io includes 1 Spectral governance ruleset.

Sommelier’s developer surface includes engineering blog, authentication, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.6/100 thin ▬ flat Agent 24/100 agent aware Front door AI 2/6 trace Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

3 APIs 1 Agent Skills

Company Web3 DeFi Blockchain Ethereum Vault Yield Analytics Cryptocurrency

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 29.6/100 · thin

Contract Quality 9.2 / 21

Developer Ergonomics 7.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 6.7 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/sommelier/"><img src="https://apis.io/badge/sommelier/card.svg" alt="Sommelier on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 0.0 — up to +20.0 composite points
Contract Quality scores 43.3 — up to +14.2 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/sommelier/apis.yml: open an issue on github.com/api-evangelist/sommelier to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	standard	17.2 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

Sommelier Integrations API

Integration-specific datasets (Kelp, ether.fi).

Sommelier Protocol API

Protocol-wide metrics such as total value locked.

Sommelier Vault Data API

Daily and hourly performance snapshots of Sommelier vaults (cellars).

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Sommelier Finance Integrations API

OPEN COLLECTION

Sommelier Finance Integrations Protocol API

OPEN COLLECTION

Sommelier Finance Integrations Vault Data API

OPEN COLLECTION

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

Track Sommelier vault performance

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Sommelier API Rules

40 rules · 38 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Sommelier Api Overlay

3 actions · update · sommelier-api-openapi.yml

DERIVED

Security Posture 2

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

Sommelier Authentication

none · 0 schemes

SECURITY

Sommelier Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

DataModel

DataModel

Conformance

Conformance

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: sommelier
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sommelier.png
name: Sommelier
description: 'Sommelier (rebranding to "Somm") is a decentralized asset-management and DeFi vault protocol whose smart-contract
  "cellars" run automated yield strategies on Ethereum. It publishes a public, read-only HTTP API that exposes on-chain vault
  performance data — daily and hourly snapshots (APY, TVL, share price, total assets), protocol-wide total value locked, per-cellar
  snapshots, and integration datasets for Kelp and ether.fi points and balances. All endpoints are unauthenticated GET requests
  with path-based parameters and a { "Response": ... } envelope; the API currently serves the ethereum network. Backed by
  Multicoin Capital.'
url: https://raw.githubusercontent.com/api-evangelist/sommelier/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Web3
- DeFi
- Blockchain
- Ethereum
- Vault
- Yield
- Analytics
- Cryptocurrency
tags_raw:
- Company
- Crypto Web3
- DeFi
- Blockchain
- Ethereum
- Vaults
- Yield
- Analytics
- Web3
- Cryptocurrency
apis:
- aid: sommelier:sommelier-integrations-api
  name: Sommelier Integrations API
  description: Integration-specific datasets (Kelp, ether.fi).
  humanURL: https://api.sommelier.finance/
  baseURL: https://api.sommelier.finance
  tags:
  - Integration
  tags_raw:
  - Integrations
  properties:
  - type: OpenAPI
    url: openapi/sommelier-integrations-api-openapi.yml
  - type: Documentation
    url: https://api.sommelier.finance/
  - type: APIReference
    url: https://api.sommelier.finance/
- aid: sommelier:sommelier-protocol-api
  name: Sommelier Protocol API
  description: Protocol-wide metrics such as total value locked.
  humanURL: https://api.sommelier.finance/
  baseURL: https://api.sommelier.finance
  tags:
  - Protocol
  properties:
  - type: OpenAPI
    url: openapi/sommelier-protocol-api-openapi.yml
  - type: Documentation
    url: https://api.sommelier.finance/
  - type: APIReference
    url: https://api.sommelier.finance/
- aid: sommelier:sommelier-vault-data-api
  name: Sommelier Vault Data API
  description: Daily and hourly performance snapshots of Sommelier vaults (cellars).
  humanURL: https://api.sommelier.finance/
  baseURL: https://api.sommelier.finance
  tags:
  - Vault Data
  properties:
  - type: OpenAPI
    url: openapi/sommelier-vault-data-api-openapi.yml
  - type: Documentation
    url: https://api.sommelier.finance/
  - type: APIReference
    url: https://api.sommelier.finance/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://somm.finance/blog
  type: Blog
- type: Website
  url: https://www.somm.finance
- type: DeveloperPortal
  url: https://api.sommelier.finance/
- type: DomainSecurity
  url: security/sommelier-domain-security.yml
- type: Authentication
  url: authentication/sommelier-authentication.yml
- type: Conventions
  url: conventions/sommelier-conventions.yml
- type: DataModel
  url: data-model/sommelier-data-model.yml
- type: Conformance
  url: conformance/sommelier-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/sommelier-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/sommelier-llms.txt
- type: Overlay
  url: overlays/sommelier-api-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 12
  pass: local-v1

Sommelier API — frequently asked questions

Does Sommelier have an API?

Yes. APIs.io lists 3 APIs from Sommelier, including Sommelier Integrations API, Sommelier Protocol API and Sommelier Vault Data API.

Is there an OpenAPI specification for the Sommelier API?

Yes. APIs.io indexes 3 OpenAPI specifications for Sommelier, each linked for download from this page.

How do I authenticate with the Sommelier API?

Sommelier uses bearer-token authentication (none · 0 schemes). The details are profiled on APIs.io as Sommelier Authentication.

Is the Sommelier API ready for AI agents?

Sommelier has a Kin Score of 29.6 out of 100 (thin) and an Agent Readiness score of 23.8 (agent-aware), scored by API Evangelist on 2026-11-06.

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/sommelier"

All providers

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

Every operation they expose

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

How their score was established

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

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

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