Dfns

Dfns Transactions API

Sign-and-broadcast of caller-supplied transactions from a wallet.

Documentation GitHub OpenAPI

Operations 2

POST /wallets/{walletId}/transactions Broadcast a transaction from a wallet #

GET /wallets/{walletId}/transactions List wallet transaction requests #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/dfns-transactions-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Dfns Transactions 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: Transactions
  description: Sign-and-broadcast of caller-supplied transactions from a wallet.
paths:
  /wallets/{walletId}/transactions:
    post:
      operationId: broadcastTransaction
      tags:
      - Transactions
      summary: Broadcast a transaction from a wallet
      description: Signs and broadcasts a caller-supplied transaction (e.g. a smart contract call) from the wallet. Requires a User Action Signature.
      security:
      - BearerAuth: []
        AppId: []
        UserAction: []
      parameters:
      - in: path
        name: walletId
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - kind
              properties:
                kind:
                  type: string
                  enum:
                  - Transaction
                  - Evm
                  - Eip1559
                transaction:
                  type: string
                  description: Hex-encoded unsigned transaction.
      responses:
        '200':
          description: The created transaction broadcast request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransferRequest'
    get:
      operationId: listTransactions
      tags:
      - Transactions
      summary: List wallet transaction requests
      parameters:
      - in: path
        name: walletId
        required: true
        schema:
          type: string
      responses:
        '200':
          description: A list of transaction requests for the wallet.
          content:
            application/json:
              schema:
                type: object
components:
  schemas:
    TransferRequest:
      type: object
      properties:
        id:
          type: string
        walletId:
          type: string
        network:
          type: string
        requester:
          type: object
        status:
          type: string
          enum:
          - Pending
          - Executing
          - Broadcasted
          - Confirmed
          - Failed
          - Rejected
        txHash:
          type:
          - string
          - 'null'
  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).