Atomic · Authentication Profile

Atomic Fi Authentication

Authentication

Atomic secures its APIs with apiKey across 2 declared security schemes, as derived from its OpenAPI definitions.

FintechPayrollDirect DepositIncome VerificationEmployment VerificationFinancial ConnectivityEmbedded Finance
Methods: apiKey Schemes: 2 OAuth flows: API key in: header

Security Schemes

ApiKeyAuth apiKey
· in: header (x-api-key)
PublicTokenAuth apiKey
· in: header (x-public-token)

Source

Authentication Profile

Raw ↑ 
generated: '2026-07-11'
method: derived
source: openapi/atomic-fi-openapi.yml
summary:
  types:
  - apiKey
  api_key_in:
  - header
schemes:
- name: ApiKeyAuth
  type: apiKey
  in: header
  parameter: 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.
  sources:
  - openapi/atomic-fi-openapi.yml
- name: PublicTokenAuth
  type: apiKey
  in: header
  parameter: x-public-token
  description: Public token for permitted client-side requests.
  sources:
  - openapi/atomic-fi-openapi.yml

Work with this as data

Every security artifact 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 security posture

4 MCP tools reach this
  • find_securityBrowse and filter every security artifact in the catalog.
  • 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 security artifact 
curl "https://apis.io/api/v1/security/atomic-fi-authentication"
All security posture 
curl "https://apis.io/api/v1/security?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.