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Abacus Expenses API

Expense report management and operations

Abacus Expenses API is one of 3 APIs that Abacus publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 8 JSON Schema definitions.

Tagged areas include Expenses. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and 8 JSON Schemas.

This API exposes 2 operations across 2 paths, and defines 3 schemas. It is described by OpenAPI 3.0.3, at version 1.0.0.

Requests are made against a single base URL, https://api.abacus.com.

2 operations 2 paths 3 schemas 2 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.3
API Version
1.0.0
Base URL
https://api.abacus.com
Authentication
OAuth 2.0
Resource Areas
1

Authentication & Security 1

Abacus Expenses API declares 1 security scheme for authenticating requests. It supports OAuth 2.0 (OAuth2) using the clientCredentials flow, exposing 3 scopes. By default, every request must be authenticated.

  • OAuth2 — OAuth 2.0 client credentials flow for API authentication

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 GET. Each is listed below with its method, path, parameters, and response codes.

Expenses 2

Expense report management and operations

GET
/expenses
Abacus List Expenses
listExpenses 6 params → 200401403
GET
/expenses/{expense_id}
Abacus Get Expense
getExpense 1 param → 200401404

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are Expense (11 properties), ExpenseListResponse (4 properties), Error (2 properties). Each schema is shown below with its type and property counts.

ExpenseListResponse
object
Paginated list of expenses
4 properties
Error
object
Error response
2 properties
Expense
object
An expense report submitted by a member
11 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

abacus-expenses-api-openapi.yml Raw ↑

Other APIs Abacus publishes across the network.

Abacus Authentication API
Abacus Members API