Project Summary
Checkbook NYC is an open source financial transparency web application.
Checkbook provides transparent access to a city's or other jurisdiction's financial information, through web-based dashboard views that show activity in categories such as Revenue, Budget, Spending, Contracts, and Payroll. It also offers that information programmatically via APIs.
The New York City Office of the Comptroller runs a production instance of Checkbook NYC at http://checkbooknyc.com/.
Checkbook NYC is licensed under the GNU Affero General Public License, version 3.0. See the file LICENSE.md for details.
In a Nutshell, Checkbook...
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has a well established, mature codebase
maintained by a small development team
with increasing Y-O-Y commits -
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took an estimated 181 years of effort (COCOMO model)
starting with its first commit in May, 2013
ending with its most recent commit about 1 month ago
Quick Reference
GNU Affero General Public License v3.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Forbidden
Sub-License
Hold Liable
Required
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
Did You Know...
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55% of companies leverage OSS for production infrastructure
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30 Day SummaryAug 23 2026 — Sep 22 2026
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12 Month SummarySep 22 2025 — Sep 22 2026
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