Dfns

Dfns Keys API

Standalone MPC keys and delegated signing.

Documentation GitHub OpenAPI

Business capability

Cybersecurity Management BC-620

Operations 4

POST /keys Create a key #

GET /keys List keys #

GET /keys/{keyId} Get a key by id #

POST /keys/{keyId}/delegate Delegate a key to an end user #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Dfns Keys API
  description: Representative OpenAPI description of the Dfns wallet-as-a-service and MPC key-management REST API.
  contact:
    name: Dfns Support
    url: https://www.dfns.co/
  termsOfService: https://www.dfns.co/terms-of-service
  version: '1.0'
servers:
- url: https://api.dfns.io
  description: Dfns production REST API (Europe / default)
- url: https://api.uae.dfns.io
  description: Dfns production REST API (UAE region)
security:
- BearerAuth: []
  AppId: []
tags:
- name: Keys
  description: Standalone MPC keys and delegated signing.
paths:
  /keys:
    post:
      operationId: createKey
      tags:
      - Keys
      summary: Create a key
      description: Creates a standalone MPC key (scheme/curve) not bound to a single network, usable to derive addresses across chains. Requires a User Action Signature.
      security:
      - BearerAuth: []
        AppId: []
        UserAction: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - scheme
              - curve
              properties:
                scheme:
                  type: string
                  example: ECDSA
                curve:
                  type: string
                  example: secp256k1
                name:
                  type: string
      responses:
        '200':
          description: The created key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Key'
    get:
      operationId: listKeys
      tags:
      - Keys
      summary: List keys
      responses:
        '200':
          description: A list of keys.
          content:
            application/json:
              schema:
                type: object
                properties:
                  items:
                    type: array
                    items:
                      $ref: '#/components/schemas/Key'
                  nextPageToken:
                    type:
                    - string
                    - 'null'
  /keys/{keyId}:
    get:
      operationId: getKey
      tags:
      - Keys
      summary: Get a key by id
      parameters:
      - in: path
        name: keyId
        required: true
        schema:
          type: string
      responses:
        '200':
          description: The key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Key'
  /keys/{keyId}/delegate:
    post:
      operationId: delegateKey
      tags:
      - Keys
      summary: Delegate a key to an end user
      description: Transfers control of a key (and its wallets) to an end user's credentials, enabling non-custodial delegated signing. Requires a User Action Signature.
      security:
      - BearerAuth: []
        AppId: []
        UserAction: []
      parameters:
      - in: path
        name: keyId
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - userId
              properties:
                userId:
                  type: string
      responses:
        '200':
          description: The delegated key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Key'
components:
  schemas:
    Key:
      type: object
      properties:
        id:
          type: string
          example: key-2s7vg-...
        scheme:
          type: string
          example: ECDSA
        curve:
          type: string
          example: secp256k1
        publicKey:
          type: string
        status:
          type: string
          enum:
          - Active
          - Archived
        custodial:
          type: boolean
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'Access token issued to a service account or a logged-in user. Sent as `Authorization: Bearer <token>`.'
    AppId:
      type: apiKey
      in: header
      name: X-DFNS-APPID
      description: The Dfns application (app) id the request is made on behalf of.
    UserAction:
      type: apiKey
      in: header
      name: X-DFNS-USERACTION
      description: A User Action Signature token proving the caller cryptographically signed the request payload. Required on sensitive mutating operations (transfers, signature generation, key/policy/permission changes).