Detroit Municipal Data and API Access

Technology and Data Michigan 3 Minutes Read ยท published February 07, 2026 Flag of Michigan

Detroit, Michigan publishes many municipal datasets through an official open data portal and accepts formal records requests under FOIA. This guide explains where to find downloadable data, how to obtain API keys or app tokens for programmatic access, which departments handle enforcement and complaints, and practical steps to request unpublished or custom data extracts.

Where to find datasets and APIs

The City of Detroit maintains an Open Data Portal with datasets across planning, transportation, property, code enforcement, and public safety. Search by keyword or browse categories to export CSV, GeoJSON, or access data via the portal API. Visit the portal directly: City of Detroit Open Data Portal[1].

  • Property and parcel records
  • Traffic counts and curbside/parking datasets
  • Building permits and inspection data
  • Licensing and registration datasets
  • Code enforcement and violation records
Use dataset filters and the API Explore view to preview fields before requesting access.

Penalties & Enforcement

Specific monetary fines or statutory penalties for misuse of datasets or API credentials are not listed on the Open Data Portal or the cited department pages; therefore the exact fine amounts are not specified on the cited page.[1][3]

  • Fine amounts: not specified on the cited page
  • Escalation (first, repeat, continuing offences): not specified on the cited page
  • Non-monetary sanctions: access suspension or revocation of API tokens, account termination, and referral to legal or law enforcement action may occur; specific remedies are not specified on the cited page
  • Enforcer and complaints: Department of Innovation and Technology manages the portal and technical controls; City Clerk handles FOIA and records-request enforcement for withheld records or fee disputes[3][2]
  • Appeals and review: FOIA fee disputes and denials follow the City Clerk FOIA appeal process; exact time limits are not specified on the cited FOIA page
If a penalty amount or a specific sanction is needed, request the information in writing via FOIA.

Applications & Forms

  • Create an account on the Open Data Portal to request an app token or view API credentials through your profile; see the portal for account steps and developer instructions[1]
  • FOIA requests use the City Clerk records request process and any published FOIA request forms on the City Clerk site[2]
  • Fees and estimated costs for large custom extracts: check the FOIA page or request an estimate; specific fee schedules are not specified on the cited page

How to access an API key or app token

  1. Create a user account on the City of Detroit Open Data Portal and sign in to your profile.
  2. Follow the portal's developer guidance to generate an app token or API key for programmatic requests; see the portal for instructions and rate limits[1].
  3. If data are not public or you need a bulk extract, submit a FOIA request through the City Clerk's FOIA process[2].
  4. For technical or access issues, contact the Department of Innovation and Technology for portal support[3].
Keep a record of your app token and rotate credentials if you suspect compromise.

FAQ

How do I get an API key for Detroit datasets?
Create an account on the Detroit Open Data Portal and follow the portal's developer instructions to generate an app token; if data are restricted, submit a FOIA request.
Are datasets free to download?
Most datasets on the portal are freely downloadable; fees for customized or large-format FOIA requests may apply and are addressed through the City Clerk FOIA process.
Who enforces misuse of API keys or data terms?
The Department of Innovation and Technology manages technical enforcement; the City Clerk handles FOIA compliance and appeals for records requests.

How-To

  1. Identify the dataset you need on the Open Data Portal.
  2. Create or sign in to your portal account and generate an app token in your profile.
  3. Use the portal API endpoints or export tools to download the data (CSV, GeoJSON) or call endpoints with your token.
  4. If data are not public, submit a FOIA request via the City Clerk and track responses per the FOIA procedure.
Document the dataset ID and the time of your request for reproducibility.

Key Takeaways

  • Start at the City of Detroit Open Data Portal for public datasets and API access.
  • Use the City Clerk FOIA process for restricted data or custom extracts.
  • Contact the Department of Innovation and Technology for technical support and account issues.

Help and Support / Resources

  1. [1] City of Detroit Open Data Portal
  2. [2] City Clerk FOIA and Records Requests
  3. [3] Department of Innovation and Technology

Categories

General Governance and Administration Public Safety Public Health and Welfare Land Use and Zoning Housing and Building Standards Transportation Environmental Protection Parks and Public Spaces Business and Consumer Protection Taxation and Finance Labor and Employment Education Civil Rights and Equity Elections and Campaign Finance Events and Special Uses Signs and Advertising Utilities and Infrastructure Technology and Data