Exponential

Exponential.fi is a DeFi company (backed by Paradigm and Norwest Venture Partners) behind YO Protocol — a cross-chain "Yield Optimizer" that automatically allocates deposits across the best-performing liquidity pools on multiple blockchains to deliver the highest risk-adjusted yield, using Exponential.fi's own Risk Ratings to balance risk and reward. yoVaults are ERC-4626 tokenized vaults (yoUSD, yoETH, yoBTC, yoEUR, yoGOLD, yoSOL and more) with ERC-7540-style async redemption, all routed through the single yoGateway entry point. The developer surface spans a public read API (api.yo.xyz), a first-party TypeScript SDK/React kit/CLI (@yo-protocol/*), official agent skills and a Base MCP plugin, and the YO Risk Graph — a paid, agent-facing DeFi risk-intelligence API monetized per-call via the x402 USDC micropayment standard on Base.

Exponential publishes 5 API contracts indexed on the APIs.io network, including Agent API, History API, Performance API, and 2 more. Tagged areas include Company, DeFi, Decentralized Finance, Yield, and Yield Optimizer.

Exponential’s developer surface includes documentation, API reference, getting-started guide, engineering blog, pricing, CLI, authentication, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.3/100 developing ▬ flat Agent 32/100 agent ready saas Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

2 published contracts 1 MCP Servers

Company DeFi Decentralized Finance YieldYield OptimizerVault ERC-4626 Cross-Chain Blockchain Crypto Risk ManagementRisk RatingsAgents x402 Web3

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 39.3/100 · developing

Contract Quality 8.2 / 21

Developer Ergonomics 12.5 / 17

Access Clarity 3.1 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.9 / 10

Discoverability 6.1 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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

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/.

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 github.com/api-evangelist/exponential: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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.

x402

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 5

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

Exponential Agent API

The Agent API from Exponential — 4 operation(s) for agent.

Exponential History API

The History API from Exponential — 1 operation(s) for history.

Exponential Performance API

The Performance API from Exponential — 1 operation(s) for performance.

Exponential Public API

The Public API from Exponential — 1 operation(s) for public.

Exponential Vault API

The Vault API from Exponential — 5 operation(s) for vault.

Open Collections 6

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

API Collection

OPEN COLLECTION

Yo Protocol Agent API

OPEN COLLECTION

Yo Protocol Agent History API

OPEN COLLECTION

Yo Protocol Agent Performance API

OPEN COLLECTION

Yo Protocol Agent Public API

OPEN COLLECTION

Yo Protocol Agent Vault API

OPEN COLLECTION

Arazzo Workflows 2

Multi-step API workflows described with the Arazzo specification.

YO Risk Graph triage

Learn the graph schema, find an entity, read its risk grade and rationale, then map its 1-hop dependencies. Every step settles an x402 micropayment.

ARAZZO

YO vault snapshot and user position

Read a vault's current snapshot, yield and TVL history, and a user's pending redemptions.

ARAZZO

MCP Servers 1

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

Exponential MCP Server

Local (stdio) MCP server; 6 tools listed.

MCP SERVER

FinOps 1

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

Exponential Finops

FINOPS

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.

Exponential Protocol Overlay

4 actions · documentation · exponential-protocol-openapi.yml

UNRECORDED

Security Posture 2

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

Exponential Authentication

none/payment-gated · 3 schemes

SECURITY

Exponential Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Exponential Agentic Access

12 operations

12 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

AgentSkill

LLMsTxt

WellKnown

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Components

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Arazzo

Arazzo

Scroll for all 8

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Security

Security

Authentication

Authentication

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: exponential
name: Exponential
description: Exponential.fi is a DeFi company (backed by Paradigm and Norwest Venture Partners) behind YO Protocol — a cross-chain
  "Yield Optimizer" that automatically allocates deposits across the best-performing liquidity pools on multiple blockchains
  to deliver the highest risk-adjusted yield, using Exponential.fi's own Risk Ratings to balance risk and reward. yoVaults
  are ERC-4626 tokenized vaults (yoUSD, yoETH, yoBTC, yoEUR, yoGOLD, yoSOL and more) with ERC-7540-style async redemption,
  all routed through the single yoGateway entry point. The developer surface spans a public read API (api.yo.xyz), a first-party
  TypeScript SDK/React kit/CLI (@yo-protocol/*), official agent skills and a Base MCP plugin, and the YO Risk Graph — a paid,
  agent-facing DeFi risk-intelligence API monetized per-call via the x402 USDC micropayment standard on Base.
url: https://raw.githubusercontent.com/api-evangelist/exponential/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- norwest-venture-partners
- paradigm
x-tier: enriched
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - url: https://exponential.fi
    status: 308
    note: declared website redirects to https://yo.xyz/risk — a different registrable domain (exponential.fi -> yo.xyz), possible
      rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- Company
- DeFi
- Decentralized Finance
- Yield
- Yield Optimizer
- Vault
- ERC-4626
- Cross-Chain
- Blockchain
- Crypto
- Risk Management
- Risk Ratings
- Agents
- x402
- Web3
tags_raw:
- Company
- DeFi
- Decentralized Finance
- Yield
- Yield Optimizer
- Vaults
- ERC-4626
- Cross-chain
- Blockchain
- Crypto
- Risk
- Risk Ratings
- Agents
- x402
- Web3
image: https://raw.githubusercontent.com/api-evangelist/exponential/refs/heads/main/apis.yml
apis:
- aid: exponential:exponential-agent-api
  name: Exponential Agent API
  description: The Agent API from Exponential — 4 operation(s) for agent.
  humanURL: https://docs.yo.xyz/integrations/api
  baseURL: https://api.yo.xyz
  tags:
  - Agents
  tags_raw:
  - Agent
  properties:
  - type: OpenAPI
    url: openapi/exponential-agent-api-openapi.yml
- aid: exponential:exponential-history-api
  name: Exponential History API
  description: The History API from Exponential — 1 operation(s) for history.
  humanURL: https://docs.yo.xyz/integrations/api
  baseURL: https://api.yo.xyz
  tags:
  - History
  properties:
  - type: OpenAPI
    url: openapi/exponential-history-api-openapi.yml
- aid: exponential:exponential-performance-api
  name: Exponential Performance API
  description: The Performance API from Exponential — 1 operation(s) for performance.
  humanURL: https://docs.yo.xyz/integrations/api
  baseURL: https://api.yo.xyz
  tags:
  - Performance
  properties:
  - type: OpenAPI
    url: openapi/exponential-performance-api-openapi.yml
- aid: exponential:exponential-public-api
  name: Exponential Public API
  description: The Public API from Exponential — 1 operation(s) for public.
  humanURL: https://docs.yo.xyz/integrations/api
  baseURL: https://api.yo.xyz
  tags:
  - Public
  properties:
  - type: OpenAPI
    url: openapi/exponential-public-api-openapi.yml
- aid: exponential:exponential-vault-api
  name: Exponential Vault API
  description: The Vault API from Exponential — 5 operation(s) for vault.
  humanURL: https://docs.yo.xyz/integrations/api
  baseURL: https://api.yo.xyz
  tags:
  - Vault
  properties:
  - type: OpenAPI
    url: openapi/exponential-vault-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/exponential-protocol-overlay.yaml
- type: DomainSecurity
  url: security/exponential-domain-security.yml
- type: AgenticAccess
  url: agentic-access/exponential-agentic-access.yml
- type: Website
  url: https://exponential.fi
- type: DeveloperPortal
  url: https://docs.yo.xyz
- type: Documentation
  url: https://docs.yo.xyz
- type: APIReference
  url: https://docs.yo.xyz/integrations/api
- type: GettingStarted
  url: https://docs.yo.xyz/integrations/integration-guides/sdk/getting-started/quickstart
- type: Blog
  url: https://docs.yo.xyz/welcome-to-yo/what-is-yo
- type: GitHubOrganization
  url: https://github.com/yoprotocol
- type: Security
  url: https://docs.yo.xyz/protocol/security-framework
- type: Pricing
  url: https://docs.yo.xyz/yo-risk-graph/agent-api
- type: Packages
  url: packages/exponential-packages.yml
- type: SDKs
  url: packages/exponential-packages.yml
- type: CLI
  url: cli/exponential-cli.yml
- type: Components
  url: components/exponential-components.yml
- type: MCPServer
  url: mcp/exponential-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/exponential-llms.txt
- type: WellKnown
  url: well-known/exponential-well-known.yml
- type: Authentication
  url: authentication/exponential-authentication.yml
- type: Conventions
  url: conventions/exponential-conventions.yml
- type: ErrorCatalog
  url: errors/exponential-problem-types.yml
- type: Lifecycle
  url: lifecycle/exponential-lifecycle.yml
- type: Conformance
  url: conformance/exponential-conformance.yml
- type: DataModel
  url: data-model/exponential-data-model.yml
- type: FinOps
  url: finops/exponential-finops.yml
- type: Arazzo
  name: YO vault snapshot and user position
  url: arazzo/exponential-vault-snapshot.yml
- type: Arazzo
  name: YO Risk Graph triage
  url: arazzo/exponential-risk-graph-triage.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence
x-x402:
  verified: true
  probed: '2026-09-24'
  url: https://risk.yo.xyz/api/v1/agent/schema
  evidence:
  - header:payment-required
  control: 404

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