Yield.xyz

Yield.xyz (formerly StakeKit) is a non-custodial, on-chain yield infrastructure API that lets wallets, custodians, exchanges, and AI agents integrate staking, restaking, liquid staking, DeFi lending, vaults, RWA yields, and perpetuals across 80+ networks and thousands of yield opportunities through a single standardized interface. The REST API discovers yields, constructs complete unsigned transaction flows (enter/exit/manage), and returns unified balances while signing and execution stay entirely with the developer. It powers platforms including Ledger, Zerion, and Tangem, and ships SDKs, an embeddable Widget, an AgentKit MCP server, and packaged agent Skills.

Yield.xyz is listed with 1 API on the APIs.io network. Tagged areas include Company, Web3, Staking, DeFi, and Yield.

Yield.xyz’s developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, changelog, and 23 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.8/100 developing ▲ 9.1 Agent 21/100 agent aware Front door AI 1/6 silent Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API 1 MCP Servers

Company Web3 Staking DeFi Yield Blockchain Restaking Vault Web3 Infrastructure Non-Custodial Cryptocurrency

Kin Score

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

Composite quality — 46.8/100 · developing

Contract Quality 0.0 / 21

Developer Ergonomics 11.7 / 17

Access Clarity 13.2 / 17

Operational Transparency 7.3 / 11

Contract Governance 0.0 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 0 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Contract Governance scores 0.0 — up to +12.0 composite points
Developer Ergonomics scores 69.0 — up to +6.2 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/yieldxyz/apis.yml: open an issue on github.com/api-evangelist/yieldxyz 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
Agent Skills (SKILL.md packages)	mixed	50.5	-	1
x402 Micropayments & Agentic Pay-per-Call	mixed	50.5	-	1

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 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

Agent Skills

measured — observed by APIs.io (published)

APIs 1

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

Yield.xyz API

Non-custodial yield REST API to discover yields, construct unsigned transaction flows (enter/exit/manage), and read unified balances across 80+ networks.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Yield.xyz MCP Server

Remote MCP server at mcp.yield.xyz over HTTP.

MCP SERVER

Yield.xyz API pricing

Prices published by Yield.xyz, read 2026-07-21 from docs.yield.xyz/docs/rate-limits-and-plans. A free plan or tier is listed.

Plan	Price
Trial free	—
Standard subscription	—
Pro subscription	—

Plan details, limits and sources →

Rate limits

Trial plan requests: 1 requests per second
Standard plan requests: 100 requests per second
Pro plan requests: 1000 requests per second

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Yieldxyz Plans

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Yieldxyz Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Yield.xyz

SLA

Security Posture 2

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

Yieldxyz Authentication

apiKey · 1 scheme

SECURITY

Yieldxyz Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

MCPServer

AgentSkill

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Components

Conventions

Lifecycle

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

TrustCenter

TrustCenter

Authentication

Authentication

Operate 5

Status, limits, changes, and where to get help

Support

StatusPage

ChangeLog

Deprecation

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: yieldxyz
name: Yield.xyz
description: Yield.xyz (formerly StakeKit) is a non-custodial, on-chain yield infrastructure API that lets wallets, custodians,
  exchanges, and AI agents integrate staking, restaking, liquid staking, DeFi lending, vaults, RWA yields, and perpetuals
  across 80+ networks and thousands of yield opportunities through a single standardized interface. The REST API discovers
  yields, constructs complete unsigned transaction flows (enter/exit/manage), and returns unified balances while signing and
  execution stay entirely with the developer. It powers platforms including Ledger, Zerion, and Tangem, and ships SDKs, an
  embeddable Widget, an AgentKit MCP server, and packaged agent Skills.
url: https://raw.githubusercontent.com/api-evangelist/yieldxyz/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
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-17
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 14
  pass: local-v1
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
image: https://yield.xyz/images/og-image.png
tags:
- Company
- Web3
- Staking
- DeFi
- Yield
- Blockchain
- Restaking
- Vault
- Web3 Infrastructure
- Non-Custodial
- Cryptocurrency
tags_raw:
- Company
- Crypto Web3
- Staking
- DeFi
- Yield
- Blockchain
- Restaking
- Vaults
- Web3 Infrastructure
- Non-Custodial
- Web3
- Cryptocurrency
apis:
- name: Yield.xyz API
  description: Non-custodial yield REST API to discover yields, construct unsigned transaction flows (enter/exit/manage),
    and read unified balances across 80+ networks.
  humanURL: https://docs.yield.xyz/
  baseURL: https://api.yield.xyz
  tags:
  - Staking
  - DeFi
  - Yield
  properties:
  - type: Documentation
    url: https://docs.yield.xyz/docs/getting-started
  - type: APIReference
    url: https://docs.yield.xyz/reference
  - type: GettingStarted
    url: https://docs.yield.xyz/docs/getting-started
  - type: Authentication
    url: authentication/yieldxyz-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/yieldxyz-plans.yml
- type: DomainSecurity
  url: security/yieldxyz-domain-security.yml
- type: Website
  url: https://yield.xyz
- type: DeveloperPortal
  url: https://docs.yield.xyz/
- type: Documentation
  url: https://docs.yield.xyz/docs/getting-started
- type: APIReference
  url: https://docs.yield.xyz/reference
- type: GettingStarted
  url: https://docs.yield.xyz/docs/getting-started
- type: GitHubOrganization
  url: https://github.com/stakekit
- type: Support
  url: https://docs.yield.xyz/docs/faqs
- type: Pricing
  url: https://docs.yield.xyz/docs/rate-limits-and-plans
- type: SignUp
  url: https://dashboard.stakek.it/sign-up/register-interest
- type: Login
  url: https://dashboard.stakek.it/login
- type: TermsOfService
  url: https://docs.yield.xyz/docs/terms-of-use
- type: PrivacyPolicy
  url: https://docs.yield.xyz/docs/privacy-policy
- type: StatusPage
  url: https://status.yield.xyz
- type: ChangeLog
  url: https://docs.yield.xyz/changelog
- type: TrustCenter
  url: https://trust.yield.xyz
- type: LLMsTxt
  url: llms/yieldxyz-llms.txt
- type: MCPServer
  url: mcp/yieldxyz-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Packages
  url: packages/yieldxyz-packages.yml
- type: SDKs
  url: packages/yieldxyz-packages.yml
- type: Components
  url: components/yieldxyz-components.yml
- type: Authentication
  url: authentication/yieldxyz-authentication.yml
- type: Conventions
  url: conventions/yieldxyz-conventions.yml
- type: Lifecycle
  url: lifecycle/yieldxyz-lifecycle.yml
- type: Deprecation
  url: lifecycle/yieldxyz-lifecycle.yml
- type: RateLimits
  url: rate-limits/yieldxyz-rate-limits.yml
- type: DataModel
  url: data-model/yieldxyz-data-model.yml
- type: WellKnown
  url: well-known/yieldxyz-well-known.yml

Yield.xyz API — frequently asked questions

Does Yield.xyz have an API?

Yes. APIs.io lists 1 API from Yield.xyz, including Yield.xyz API.

How do I authenticate with the Yield.xyz API?

Yield.xyz uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Yieldxyz Authentication.

How much does the Yield.xyz API cost?

APIs.io lists 3 pricing plans for Yield.xyz, with each plan's price, limits and inclusions under Pricing on this page.

Does Yield.xyz have an MCP server?

Yes. APIs.io lists 1 MCP server for Yield.xyz: Remote MCP server at mcp.yield.xyz over HTTP.

Is the Yield.xyz API ready for AI agents?

Yield.xyz has a Kin Score of 46.8 out of 100 (developing) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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