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OpenAPI Specification

openapi: 3.2.0
info:
  title: Fourzerotwo Si Sanctions API
  version: 1.1.0
  contact:
    url: https://fourzerotwo.si
  description: 'Operations tagged sanctions across 2 of this provider''s published API definitions: openapi.json, fourzerotwo-si-openapi.json. Each path carries the servers of the definition it was published in.'
servers:
- url: https://fourzerotwo.si
tags:
- name: sanctions
  description: 'Sanctions Screening: Fuzzy-screen a person, company or vessel against the US OFAC SDN, UK, EU and UN sanctions lists in one call.'
paths:
  /v1/sanctions/screen-uk:
    get:
      operationId: sanctions__screen_uk
      summary: 'Sanctions Screening: Screen against the UK list'
      description: 'Potential matches on the UK Sanctions List only (FCDO). Price: $0.01 USDC per call via x402. 3 free calls/day with a free key.'
      tags:
      - sanctions
      externalDocs:
        url: https://fourzerotwo.si/apis/sanctions/screen-uk
      parameters:
      - name: name
        in: query
        required: true
        description: Name
        schema:
          type: string
          maxLength: 200
        example: Rosneft
      - name: threshold
        in: query
        required: false
        description: Minimum score (default 80)
        schema:
          type: integer
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.010000'
      x-free-tier: sample
      x-mcp-tool: sanctions__screen-uk
    servers:
    - url: https://fourzerotwo.si
  /v1/sanctions/screen-us:
    get:
      operationId: sanctions__screen_us
      summary: 'Sanctions Screening: Screen against OFAC SDN'
      description: 'Potential matches on the US OFAC SDN list only. Price: $0.01 USDC per call via x402. 3 free calls/day with a free key.'
      tags:
      - sanctions
      externalDocs:
        url: https://fourzerotwo.si/apis/sanctions/screen-us
      parameters:
      - name: name
        in: query
        required: true
        description: Name
        schema:
          type: string
          maxLength: 200
        example: Bank Melli Iran
      - name: threshold
        in: query
        required: false
        description: Minimum score (default 80)
        schema:
          type: integer
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.010000'
      x-free-tier: sample
      x-mcp-tool: sanctions__screen-us
    servers:
    - url: https://fourzerotwo.si
  /v1/sanctions/entry:
    get:
      operationId: sanctions__entry
      summary: 'Sanctions Screening: Listed entry detail'
      description: 'Full record for a matched entry: all aliases, programmes, countries, dates of birth and remarks. Price: $0.005 USDC per call via x402. 3 free calls/day with a free key.'
      tags:
      - sanctions
      externalDocs:
        url: https://fourzerotwo.si/apis/sanctions/entry
      parameters:
      - name: list
        in: query
        required: false
        description: us-ofac, uk, eu or un
        schema:
          type: string
        example: uk
      - name: list_id
        in: query
        required: false
        description: The list's own id (list_id in a screen result)
        schema:
          type: string
        example: RUS0251
      - name: entry_id
        in: query
        required: false
        description: Or entry_id from a screen result
        schema:
          type: integer
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.005000'
      x-free-tier: sample
      x-mcp-tool: sanctions__entry
    servers:
    - url: https://fourzerotwo.si
  /v1/sanctions/lists:
    get:
      operationId: sanctions__lists
      summary: 'Sanctions Screening: List versions'
      description: 'Which lists are mirrored, entry counts, list dates and last sync time. Price: $0.001 USDC per call via x402. 3 free calls/day with a free key.'
      tags:
      - sanctions
      externalDocs:
        url: https://fourzerotwo.si/apis/sanctions/lists
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.001000'
      x-free-tier: sample
      x-mcp-tool: sanctions__lists
    servers:
    - url: https://fourzerotwo.si
  /v1/sanctions/screen:
    get:
      operationId: sanctions__screen
      summary: 'Sanctions Screening: Screen a name'
      description: 'Potential matches across all four lists with score, list, programmes, countries and dates of birth. Price: $0.02 USDC per call via x402. 3 free calls/day with a free key.'
      tags:
      - sanctions
      externalDocs:
        url: https://fourzerotwo.si/apis/sanctions/screen
      parameters:
      - name: name
        in: query
        required: true
        description: Person, company or vessel name
        schema:
          type: string
          maxLength: 200
        example: Vladimir Putin
      - name: type
        in: query
        required: false
        description: individual, entity or vessel
        schema:
          type: string
      - name: birth_year
        in: query
        required: false
        description: Birth year to corroborate
        schema:
          type: integer
        example: 1952
      - name: country
        in: query
        required: false
        description: Country to corroborate
        schema:
          type: string
        example: Russia
      - name: lists
        in: query
        required: false
        description: 'Comma list: us-ofac,uk,eu,un (default all)'
        schema:
          type: string
      - name: threshold
        in: query
        required: false
        description: Minimum score 50-100 (default 80)
        schema:
          type: integer
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.020000'
      x-free-tier: sample
      x-mcp-tool: sanctions__screen
    servers:
    - url: https://fourzerotwo.si
  /v1/sanctions/wallet-screen:
    get:
      operationId: sanctions__wallet_screen
      summary: 'Sanctions Screening: Screen a crypto wallet'
      description: 'Whether a crypto address (BTC, ETH/EVM, TRX, USDT and others) is listed against a designated party on the OFAC SDN list. Price: $0.002 USDC per call via x402. Free within the daily allowance with a free key.'
      tags:
      - sanctions
      externalDocs:
        url: https://fourzerotwo.si/apis/sanctions/wallet-screen
      parameters:
      - name: address
        in: query
        required: true
        description: Wallet address
        schema:
          type: string
          maxLength: 140
        example: '0x1CAb8177ACe78b1B6B1c393371F4f2dCAE40CbEB'
      responses:
        '200':
          description: The data (paid, or free tier).
          content:
            application/json: {}
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '400':
          $ref: '#/components/responses/Error'
        '404':
          $ref: '#/components/responses/Error'
        '502':
          $ref: '#/components/responses/Error'
      security:
      - {}
      - freeKey: []
      x-price-usd: '0.002000'
      x-free-tier: free
      x-mcp-tool: sanctions__wallet-screen
    servers:
    - url: https://fourzerotwo.si
components:
  responses:
    PaymentRequired:
      description: x402 payment required. The body (also base64 in the PAYMENT-REQUIRED header) lists accepted payments.
      headers:
        PAYMENT-REQUIRED:
          schema:
            type: string
          description: Base64 JSON x402 v2 PaymentRequired
      content:
        application/json:
          schema:
            type: object
            properties:
              x402Version:
                type: integer
              error:
                type: string
              accepts:
                type: array
                items:
                  type: object
    Error:
      description: 400 = invalid input, 404 = not found at the source, 502 = the source failed. Never charged.
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
              charged:
                type: boolean
  securitySchemes:
    freeKey:
      type: apiKey
      in: header
      name: X-API-Key
      description: Optional free key (fzt_…) for the free tier.
x-refined-from:
- openapi.json
- fourzerotwo-si-openapi.json