openapi: 3.2.0
info:
  title: MoltGuard Sybil Detection API
  version: 1.5.0
  description: 'Trust & Integrity Service for the x402 Agent Economy. Sub-API of MolTrust Trust Registry (api.moltrust.ch). See also: https://api.moltrust.ch/openapi.json (parent service).'
  contact:
    name: CryptoKRI GmbH
    url: https://moltrust.ch
  license:
    name: Apache-2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: https://api.moltrust.ch/guard
  description: Production
security: []
tags:
- name: sybil-detection
  description: On-chain sybil-cluster detection
paths:
  /api/sybil/scan/{address}:
    get:
      tags:
      - sybil-detection
      summary: On-chain sybil-cluster detection (paid)
      description: 'Heuristic clustering: wallet age, counterparty graph, funding-source convergence. Returns cluster detection verdict + confidence + evidence.'
      operationId: getSybilScan
      security:
      - x402: []
      x-moltrust-pricing:
        amount: '0.10'
        currency: USDC
        chain: eip155:8453
      parameters:
      - name: address
        in: path
        required: true
        schema:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        description: EVM 0x address
      responses:
        '200':
          description: Sybil scan result
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SybilScanResponse'
        '400':
          description: Invalid 0x address
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InvalidAddressError'
        '402':
          description: x402 payment required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PaymentRequired'
components:
  schemas:
    SybilScanResponse:
      type: object
      description: On-chain sybil-cluster detection result.
      properties:
        wallet:
          type: string
        sybilCluster:
          type: object
          properties:
            detected:
              type: boolean
            clusterId:
              type:
              - string
              - 'null'
            clusterSize:
              type: integer
            confidence:
              type: number
              minimum: 0
              maximum: 1
            evidence:
              type: array
              items:
                type: string
        walletAge:
          type: integer
          description: Seconds since first tx
        counterparties:
          type: integer
        fundingSource:
          type:
          - string
          - 'null'
        _meta:
          $ref: '#/components/schemas/ScoreMeta'
    InvalidAddressError:
      type: object
      properties:
        error:
          type: string
          enum:
          - invalid_address
        message:
          type: string
      required:
      - error
      - message
    PaymentRequired:
      type: object
      description: x402 v2 challenge body. Returned with HTTP 402 when X-PAYMENT header is missing or invalid.
      properties:
        x402:
          type: object
          properties:
            version:
              type: integer
              example: 2
            accepts:
              type: array
              items:
                type: object
                properties:
                  scheme:
                    type: string
                    example: exact
                  network:
                    type: string
                    example: base
                  maxAmountRequired:
                    type: object
                    properties:
                      asset:
                        type: string
                        example: USDC
                      amount:
                        type: string
                        description: USDC base units (6 decimals)
                  payTo:
                    type: string
    ScoreMeta:
      type: object
      properties:
        service:
          type: string
          enum:
          - moltguard
        version:
          type: string
        chain:
          type: string
          example: base-<block-number>
        dataSource:
          type: string
          example: blockscout+rpc+moltrust
        timestamp:
          type: string
          format: date-time
        pricingTier:
          type: string
          enum:
          - paid
          - free-limited
          - sample
        note:
          type: string
  securitySchemes:
    x402:
      type: apiKey
      in: header
      name: X-PAYMENT
      description: 'x402 v2 payment receipt header. Format: "x402 <base64-encoded-receipt>". See https://x402.org/writing/x402-v2-launch.'