Montréal Open Data & API Access - City Bylaws

Overview

Montréal, Quebec maintains a public open data portal for developers, researchers and the public. This guide explains how to access the Donnes Montral portal, use its APIs, and meet city rules and compliance expectations. Refer to the official portal and the City of Montral open data pages for dataset metadata, licensing and contact details: Donnes Montral^[1] and City of Montral - Open data^[2].

Access & API use

Most datasets on the portal are accessible via published API endpoints. Developers should read dataset metadata for schema, update frequency, and license terms on the dataset page before calling APIs. Rate limits, API keys or usage rules are not consistently published for every dataset; check each dataset's metadata for specifics.

• Find datasets on the portal and open the dataset's metadata page.
• Review the licence field for permitted uses and required attribution.
• Use the dataset's API endpoint (listed on the dataset page) and test queries with standard HTTP tools.
• Respect any listed rate limits, authentication requirements or specific dataset terms.
• Report technical issues via the portal contact details or the City open data contact page.

Penalties & Enforcement

Official city sources consulted for this guide do not publish specific monetary fines or numeric penalties for misuse of the open data portal; such amounts are not specified on the cited page.^[1] Developers should not assume any particular fine schedule applies without a formal notice from the City.

• Fine amounts: not specified on the cited page.^[1]
• Escalation (first/repeat/continuing offences): not specified on the cited page.^[1]
• Non-monetary sanctions (orders, suspension of access, dataset removal, court actions): not specified on the cited page.^[1]
• Enforcer and complaints: contact the City of Montral open data contact page for reporting and enquiries.^[2]
• Appeal/review routes and time limits: not specified on the cited page; follow instructions provided by the City in any enforcement notice.^[1]

Applications & Forms

No dedicated form for API access or developer permits is published on the portal pages consulted; if an access key or application is required it will be listed on the specific dataset or dataset provider page, otherwise a formal form is not specified on the cited page.^[1]

How-To

1. Locate the dataset on the Donnes Montral portal and open its metadata.
2. Confirm the licence, attribution and any usage restrictions listed in metadata.
3. Copy the API endpoint or download link and run test queries with curl or a REST client.
4. If you encounter technical or legal questions, use the contact details on the dataset page or the City open data contact page.

FAQ

Do I need permission to use data from the portal?

Check each dataset's licence on its metadata page; many datasets are open but some have conditions—see the dataset metadata.

Where do I report broken API endpoints or data errors?

Report technical issues using the portal's dataset contact details or the City open data contact page linked above.^[2]

Are there published fines for misuse?

Specific fines or penalty amounts are not published on the portal pages consulted; enforcement details are not specified on the cited pages.^[1]

Key Takeaways

• Always read dataset metadata and licence before using data.
• Test API endpoints with tools like curl and monitor rate limits.

Help and Support / Resources

• Donnes Montral (official open data portal)
• City of Montral - Open data
• Quebec - Act respecting access to documents and protection of personal information (A-2.1)

1. [1] Donnes Montral - official open data portal
2. [2] City of Montral - Open data information and contacts