BlackLine

BlackLine is a cloud-based financial operations (FinOps) and accounting automation platform that helps finance and accounting teams automate the financial close, account reconciliation, journal entry, transaction matching, intercompany, consolidation integrity, and reporting processes. BlackLine exposes a suite of RESTful APIs on its developer portal so customers and partners can integrate the platform with ERP systems, banking platforms, payroll, and reporting tools — covering period management, user and team management, account reconciliation, journals, task management, transaction matching, and reporting. APIs authenticate with OAuth 2.0 client credentials. BlackLine (NASDAQ: BL) is a public company surfaced in the API Evangelist network as a portfolio company of ICONIQ Capital.

BlackLine publishes 7 APIs on the APIs.io network. Tagged areas include Company, Fintech, FinOps, Accounting, and Financial Close.

BlackLine’s developer surface includes documentation, API reference, authentication, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

26.8/100 emerging ▬ flat Agent 10/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

7 APIs

CompanyFintechFinOpsAccountingFinancial CloseReconciliationAccounting AutomationERP IntegrationEnterprise Software

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 26.8/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 7.4 / 20

Commercial Clarity 7.4 / 20

Operational Transparency 2.1 / 13

Governance 0.0 / 12

Discoverability 10.0 / 10

Agent readiness — 10/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/blackline: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Conformance

Conformance

Access & Security 4

Authentication, authorization, and security posture

Authentication

Compliance

TrustCenter

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: blackline
name: BlackLine
description: 'BlackLine is a cloud-based financial operations (FinOps) and accounting automation platform that helps finance
  and accounting teams automate the financial close, account reconciliation, journal entry, transaction matching, intercompany,
  consolidation integrity, and reporting processes. BlackLine exposes a suite of RESTful APIs on its developer portal so customers
  and partners can integrate the platform with ERP systems, banking platforms, payroll, and reporting tools — covering period
  management, user and team management, account reconciliation, journals, task management, transaction matching, and reporting.
  APIs authenticate with OAuth 2.0 client credentials. BlackLine (NASDAQ: BL) is a public company surfaced in the API Evangelist
  network as a portfolio company of ICONIQ Capital.'
url: https://raw.githubusercontent.com/api-evangelist/blackline/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- iconiq-capital
x-tier: profiled
x-tier-reason: portfolio-lead-enriched
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
image: https://a.storyblok.com/f/213807/1200x630/d2bcfbe58d/blackline-future-ready-financial-operations.jpg
tags:
- Company
- Fintech
- FinOps
- Accounting
- Financial Close
- Reconciliation
- Accounting Automation
- ERP Integration
- Enterprise Software
apis:
- name: BlackLine Period API
  description: Manage accounting periods (open/close, list periods) in BlackLine.
  humanURL: https://developer.blackline.com/docs/period/1/overview
  baseURL: https://api.blackline.com
  properties:
  - type: Documentation
    url: https://developer.blackline.com/docs/period/1/overview
- name: BlackLine User Management API
  description: Create, read, and manage BlackLine user accounts.
  humanURL: https://developer.blackline.com/docs/users/1/overview
  baseURL: https://api.blackline.com
  properties:
  - type: Documentation
    url: https://developer.blackline.com/docs/users/1/overview
- name: BlackLine Team Management API
  description: Manage BlackLine teams and team membership.
  humanURL: https://developer.blackline.com/docs/teams/1/overview
  baseURL: https://api.blackline.com
  properties:
  - type: Documentation
    url: https://developer.blackline.com/docs/teams/1/overview
- name: BlackLine Reporting API
  description: Retrieve reporting data from the BlackLine platform.
  humanURL: https://developer.blackline.com/docs/reporting-api/1/overview
  baseURL: https://api.blackline.com
  properties:
  - type: Documentation
    url: https://developer.blackline.com/docs/reporting-api/1/overview
- name: BlackLine Account Reconciliation API
  description: Manage reconciliation items and supporting documents programmatically.
  humanURL: https://developer.blackline.com/apis
  baseURL: https://api.blackline.com
- name: BlackLine Journal Entry API
  description: Create and manage journal entries programmatically.
  humanURL: https://developer.blackline.com/apis
  baseURL: https://api.blackline.com
- name: BlackLine Transaction Matching API
  description: Push transactions into BlackLine for automated matching.
  humanURL: https://developer.blackline.com/apis
  baseURL: https://api.blackline.com
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.blackline.com/
- type: DeveloperPortal
  url: https://developer.blackline.com/
- type: Documentation
  url: https://developer.blackline.com/apis
- type: APIReference
  url: https://developer.blackline.com/apis
- type: Authentication
  url: authentication/blackline-authentication.yml
- type: StatusPage
  url: https://trust.blackline.com/
- type: Lifecycle
  url: lifecycle/blackline-lifecycle.yml
- type: Conformance
  url: conformance/blackline-conformance.yml
- type: Compliance
  url: https://www.blackline.com/why-blackline/security/
- type: TrustCenter
  url: security/blackline-trust-center.yml
- type: DomainSecurity
  url: security/blackline-domain-security.yml
- type: Blog
  url: https://www.blackline.com/blog/
- type: PrivacyPolicy
  url: https://www.blackline.com/legal/privacy-policy/
- type: TermsOfService
  url: https://www.blackline.com/legal/
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

BlackLine

Kin Score

APIs 7

BlackLine Period API

BlackLine User Management API

BlackLine Team Management API

BlackLine Reporting API

BlackLine Account Reconciliation API

BlackLine Journal Entry API

BlackLine Transaction Matching API

Security Posture 3

Blackline Authentication

Blackline Domain Security

Blackline Trust Center

Resources