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OpenAPI Specification

openapi: 3.2.0
info:
  title: YO Risk Graph Agent API
  version: '1.0'
  description: 'The YO Risk Graph (Exponential.fi Risk Ratings) exposed as HTTP APIs. Two surfaces: a free public Vault Exposure endpoint that returns a vault''s current collateral exposure, and a paid Agent API for full risk grading and dependency mapping across pools, assets, protocols and chains. The Agent API is monetized per-call via the x402 micropayment standard (v2) in USDC on Base mainnet (EIP-3009 transferWithAuthorization via Coinbase CDP; payer pays no gas). Paths and parameters are captured from the published docs; per-call prices are recorded as x-x402-price extensions.'
servers:
- url: https://risk.yo.xyz
  description: Production
tags:
- name: Agent
paths:
  /api/v1/agent/schema:
    get:
      operationId: agentSchema
      summary: Data model — node types, edge types, grade letters. Call this first.
      tags:
      - Agent
      x-x402-price: $0.001
      responses:
        '200':
          description: Graph schema
        '402':
          description: Payment Required — x402 invoice in PAYMENT-REQUIRED header
  /api/v1/agent/search:
    get:
      operationId: agentSearch
      summary: Search pools/assets/protocols/chains. Lean teaser per hit (no grade). Capped at 10 results.
      description: Always settles, even on a zero-result query, since the scan itself is the billable work.
      tags:
      - Agent
      x-x402-price: $0.001
      parameters:
      - name: q
        in: query
        required: true
        description: Asset address or protocol/asset name. No wildcards.
        schema:
          type: string
      - name: label
        in: query
        required: false
        description: Restrict to Pool, Asset, Protocol, or Chain
        schema:
          type: string
          enum:
          - Pool
          - Asset
          - Protocol
          - Chain
      - name: limit
        in: query
        required: false
        description: 1-10, default 10
        schema:
          type: integer
          minimum: 1
          maximum: 10
          default: 10
      - name: tvl
        in: query
        required: false
        description: Comparator, e.g. ">1000000"
        schema:
          type: string
      - name: grade
        in: query
        required: false
        description: Comparator over A-F, e.g. "<=B"
        schema:
          type: string
      responses:
        '200':
          description: Up to 10 teaser hits
        '402':
          description: Payment Required — x402 invoice
  /api/v1/agent/node/{nodeId}:
    get:
      operationId: agentNode
      summary: Full properties + grade (_riskTier) + riskBreakdown (rationale as Q&A pairs).
      tags:
      - Agent
      x-x402-price: $0.05
      parameters:
      - name: nodeId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Node with grade and rationale
        '402':
          description: Payment Required — x402 invoice
        '404':
          description: Not indexed (free)
  /api/v1/agent/dependencies:
    get:
      operationId: agentDependencies
      summary: A pool's direct (1-hop) dependencies — edges and neighboring nodes, each stamped with lastUpdatedAt.
      tags:
      - Agent
      x-x402-price: $1.00
      parameters:
      - name: nodeId
        in: query
        required: true
        schema:
          type: string
      responses:
        '200':
          description: 1-hop dependency subgraph
        '402':
          description: Payment Required — x402 invoice