Atomic

Atomic Linked Accounts API

The Linked Accounts API from Atomic — 2 operation(s) for linked accounts.

Documentation GitHub OpenAPI

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/atomic-fi-linked-accounts-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 email required.

GitHub Google LinkedIn

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

OpenAPI Specification

openapi: 3.0.3
info:
  title: Atomic Access Tokens Linked Accounts API
  description: Representative OpenAPI description of Atomic's payroll and financial connectivity API (UserLink and PayLink). Atomic lets applications switch direct deposit, verify income and employment, retrieve payroll data, and update payment methods on file through user-permissioned access. The Transact SDK is an embedded, hosted front-end launched with a publicToken that drives deposit, verify, and tax task workflows on top of these endpoints. This is a faithful, non-exhaustive representation authored by API Evangelist from public documentation, not an official Atomic artifact.
  termsOfService: https://atomicfi.com/legal
  contact:
    name: Atomic Support
    url: https://docs.atomicfi.com
  version: '1.0'
servers:
- url: https://api.atomicfi.com
  description: Production
- url: https://sandbox-api.atomicfi.com
  description: Sandbox
- url: https://pci.atomicfi.com
  description: Production PCI host (PayLink card data)
- url: https://sandbox-pci.atomicfi.com
  description: Sandbox PCI host (PayLink card data)
security:
- ApiKeyAuth: []
tags:
- name: Linked Accounts
paths:
  /task-workflow/from-linked-account:
    post:
      operationId: createTaskWorkflowFromLinkedAccount
      tags:
      - Linked Accounts
      summary: Start a task workflow from a linked account
      description: Runs deposit, verify, or tax tasks against an already-connected linked account without re-authenticating the user.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TaskWorkflowFromLinkedAccountRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TaskWorkflowResponse'
  /linked-account/list/{identifier}:
    get:
      operationId: listLinkedAccounts
      tags:
      - Linked Accounts
      summary: List linked accounts
      parameters:
      - $ref: '#/components/parameters/IdentifierPath'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/LinkedAccount'
components:
  schemas:
    Company:
      type: object
      properties:
        _id:
          type: string
        name:
          type: string
        status:
          type: string
        branding:
          type: object
        tags:
          type: array
          items:
            type: string
    TaskWorkflowFromLinkedAccountRequest:
      type: object
      required:
      - linkedAccount
      - tasks
      properties:
        linkedAccount:
          type: string
        tasks:
          type: array
          items:
            $ref: '#/components/schemas/TaskDefinition'
    TaskDefinition:
      type: object
      properties:
        operation:
          type: string
          enum:
          - deposit
          - verify
          - tax
        onComplete:
          type: string
          enum:
          - continue
          - finish
        onFail:
          type: string
          enum:
          - continue
          - finish
        distribution:
          type: object
          properties:
            type:
              type: string
              enum:
              - total
              - fixed
              - percent
            amount:
              type: number
    Task:
      type: object
      properties:
        _id:
          type: string
        status:
          type: string
          enum:
          - queued
          - processing
          - completed
          - failed
        product:
          type: string
        authentication:
          type: string
        company:
          $ref: '#/components/schemas/Company'
        payrollDataAvailable:
          type: boolean
        createdAt:
          type: string
          format: date-time
    LinkedAccount:
      type: object
      properties:
        _id:
          type: string
        valid:
          type: boolean
        company:
          $ref: '#/components/schemas/Company'
        lastSuccess:
          type: string
          format: date-time
        lastFailure:
          type: string
          format: date-time
    TaskWorkflowResponse:
      type: object
      properties:
        task:
          $ref: '#/components/schemas/Task'
        taskWorkflow:
          type: string
  parameters:
    IdentifierPath:
      name: identifier
      in: path
      required: true
      description: Your unique identifier for the end user.
      schema:
        type: string
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: API Key sent in the x-api-key header, paired with the x-api-secret header. Used for backend-to-backend calls.
    PublicTokenAuth:
      type: apiKey
      in: header
      name: x-public-token
      description: Public token for permitted client-side requests.