Family Office Knowledge Graph

Family Office Knowledge Graph X402 API

The X402 API from Family Office Knowledge Graph — 2 operation(s) for x402.

GitHub OpenAPI

Operations 2

GET /x402/receipt/{nonce} Resolve a receipt, forever #
GET /x402/jwks.json Receipt signing key, kid fo-kg-x402-2026-09 #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/familyofficeknowledgegraph-ai/openapi/familyofficeknowledgegraph-ai-x402-api-openapi.yml

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OpenAPI Specification

familyofficeknowledgegraph-ai-x402-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Family Office Knowledge Graph — the doors X402 API
  version: 0.21.0
  description: 'Family Office Knowledge Graph. Operator: Agentic KG Holdings. Public record, read-only; MCP doors (apex + node); one paid call (x402); one licensed route (office OAuth).'
  contact:
    name: Agentic KG Holdings
    email: mk@agent-kg.ai
    url: https://familyofficeknowledgegraph.ai/#contact
servers:
- url: https://familyofficeknowledgegraph.ai
- url: https://mcp.fo-kg.ai
  description: apex door
- url: https://ae.fo-kg.ai
  description: node door ae-fo-kg
- url: https://au.fo-kg.ai
  description: node door au-fo-kg
- url: https://ca.fo-kg.ai
  description: node door ca-fo-kg
- url: https://ch.fo-kg.ai
  description: node door ch-fo-kg
- url: https://de.fo-kg.ai
  description: node door de-fo-kg
- url: https://dk.fo-kg.ai
  description: node door dk-fo-kg
- url: https://es.fo-kg.ai
  description: node door es-fo-kg
- url: https://fr.fo-kg.ai
  description: node door fr-fo-kg
- url: https://it.fo-kg.ai
  description: node door it-fo-kg
- url: https://lu.fo-kg.ai
  description: node door lu-fo-kg
- url: https://nl.fo-kg.ai
  description: node door nl-fo-kg
- url: https://no.fo-kg.ai
  description: node door no-fo-kg
- url: https://row.fo-kg.ai
  description: node door row-fo-kg
- url: https://sg.fo-kg.ai
  description: node door sg-fo-kg
- url: https://uk.fo-kg.ai
  description: node door uk-fo-kg
- url: https://us.fo-kg.ai
  description: node door us-fo-kg
tags:
- name: X402
paths:
  /x402/receipt/{nonce}:
    get:
      operationId: receipt
      summary: Resolve a receipt, forever
      parameters:
      - name: nonce
        in: path
        required: true
        schema:
          type: string
          pattern: ^[a-f0-9]{32}$
      responses:
        '200':
          description: the receipt
        '404':
          description: unknown nonce
      tags:
      - X402
  /x402/jwks.json:
    get:
      operationId: x402Jwks
      summary: Receipt signing key, kid fo-kg-x402-2026-09
      responses:
        '200':
          description: jwks
      tags:
      - X402