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OnPay Deductions API

The Deductions API from OnPay — 7 operation(s) for deductions.

OnPay Deductions API is one of 6 APIs that OnPay publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Deductions. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and authentication docs.

This API exposes 12 operations across 7 paths, and defines 9 schemas. It is described by OpenAPI 3.2.0, at version 2.0.0.

Requests are made against a single base URL, https://onpaydev.com/v2.

12 operations 7 paths 9 schemas 1 DELETE4 GET3 PATCH4 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2.0.0
Base URL
https://api.onpay.com/v2
Authentication
OAuth 2.0, API Key
Resource Areas
1

Authentication & Security 2

OnPay Deductions API declares 2 security schemes for authenticating requests. It supports OAuth 2.0 (OAuth2) using the authorizationCode flow, exposing 6 scopes. An API key is passed in the header as Authorization (Bearer).

Paths & Operations 12

Across 7 paths, the API surfaces 12 operations — 1 DELETE, 4 GET, 3 PATCH, 4 POST. Each is listed below with its method, path, parameters, and response codes.

Deductions 12
GET
/employees/{employee_id}/deductions
Get deductions for an employee
1 param → 200default
PATCH
/employees/{employee_id}/deductions/{deduction_id}
Update an employee deduction batch by employee ID and deduction ID
2 params body → 200default
POST
/employees/{employee_id}/deductions/{deduction_id}
Insert deduction batch for an employee by employee ID and deduction ID
2 params body → 200
GET
/employees/{employee_id}/deductions/{deduction_id}/schedule
List scheduled changes to employee deductions
2 params → 200
POST
/employees/{employee_id}/deductions/{deduction_id}/schedule
Submit a scheduled change to a deduction batch for an employee by employee ID and deduction ID
2 params body → 200
GET
/company/deductions
Get all deductions for company
→ 200default
POST
/company/deductions
create a new deduction
body → 200default
PATCH
/company/deductions/{deduction_id}
Patch deduction
1 param body → 200default
DELETE
/company/deductions/{deduction_id}
Delete deduction by Id.
1 param → 200default
GET
/company/deduction-groupings
→ 200default
POST
/company/deduction-groupings
body → 200default
PATCH
/company/deduction-groupings/{id}
1 param body → 200default

Schemas 9

The contract defines 9 schemas that model the data the API accepts and returns. The most detailed are EmployeeDeductionItemBatch (19 properties), EmployeeDeductionItem (14 properties), DeductionGroupingItem (7 properties), InsertSuccessful (2 properties). Each schema is shown below with its type and property counts.

EmployeeDeductionItemBatch
object
19 properties
InsertSuccessful
object
2 properties
EmployeeDeductionItem
object
14 properties
DeductionType
integer
1 Section 125 2 401K 3 403B 4 457 6 Roth 401K 7 Roth 403B 8 FSA 9 HSA 10 Simple IRA 21 Post-tax 22 Cash tips imputed 23 Union dues 24 Imputed 25 Union dues bas…
DeleteSuccessful
object
1 property
DeductionGroupingItem
object
7 properties
DeductionIncludedIn401kReports
string
L For Standard Deductions: include as loan in 401k reports S report as safe harbor Y include in deferral amounts N exclude
PatchSuccessful
object
1 property
ErrorBadRequest
object
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

onpay-deductions-api-openapi.yml Raw ↑

Other APIs OnPay publishes across the network.

OnPay Company API
OnPay Employees API
OnPay Pay Runs API
OnPay Reports API
OnPay User API
Where this information came from

This is an independent, third-party profile of OnPay Deductions API, 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.

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