Atomic
Atomic is a payroll and financial connectivity platform. Through user-permissioned access to payroll, HR, and merchant accounts, Atomic lets applications switch direct deposit, verify income and employment, retrieve payroll data, and update payment methods on file. The Transact SDK is an embedded, hosted front-end that drives these workflows on top of Atomic's backend REST API.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Atomic the way a machine reads it — 26 machine-readable artifacts across 9 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Atomic scores 35.4/100 (thin), with a separate agent-readiness read of 31/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-08-17 · rubric v0.11.0
Put this on your own site. The badge is drawn live from Atomic's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/atomic-fi/"
title="Atomic on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/atomic-fi.svg"
alt="Atomic Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/atomic-fi/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/atomic-fi/"
title="Atomic on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/atomic-fi/card.svg"
alt="Atomic Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Atomic
Each block below is one kind of artifact we hold for Atomic. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 9
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Atomic Access Tokens API
The Access Tokens API from Atomic — 2 operation(s) for access tokens.
Atomic Company API
The Company API from Atomic — 3 operation(s) for company.
Atomic Data API
The Data API from Atomic — 7 operation(s) for data.
Atomic Linked Accounts API
The Linked Accounts API from Atomic — 2 operation(s) for linked accounts.
Atomic PayLink API
The PayLink API from Atomic — 2 operation(s) for paylink.
Atomic Secrets API
The Secrets API from Atomic — 2 operation(s) for secrets.
Atomic Tasks API
The Tasks API from Atomic — 5 operation(s) for tasks.
Atomic Users API
The Users API from Atomic — 3 operation(s) for users.
Atomic Webhooks API
The Webhooks API from Atomic — 2 operation(s) for webhooks.
Scroll within the panel for all 9 ·
Open Collections 11
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONAtomic Access Tokens API
OPEN COLLECTIONAtomic Access Tokens Company API
OPEN COLLECTIONAtomic Access Tokens Data API
OPEN COLLECTIONAtomic Access Tokens Linked Accounts API
OPEN COLLECTIONAtomic Access Tokens PayLink API
OPEN COLLECTIONAtomic Access Tokens Secrets API
OPEN COLLECTIONAtomic Access Tokens Tasks API
OPEN COLLECTIONAtomic Access Tokens Users API
OPEN COLLECTIONAtomic Access Tokens Webhooks API
OPEN COLLECTIONAtomic API
OPEN COLLECTIONScroll within the panel for all 11 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Atomic Fi Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Atomic Fi Finops
FINOPSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Atomic — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/atomic-fi · machine-readable index on apis.io
This is an independent, third-party profile of Atomic, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
·
Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and
you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.