Overview
City, Toronto Open Data is Canada's largest municipal open data portal, providing free access to datasets on transit, parks, permits, and public health. No authentication is required, so you can start querying immediately. It also uses the CKAN API, which is widely used by government portals worldwide.
Beginner Tip
Use the CKAN datastore_search action with a resource_id to fetch records from any Toronto dataset—find the resource_id by browsing the dataset page on open.toronto.ca.
Measurement Record
What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.
- Request
- GET https://ckan0.cf.opendata.inter.prod-toronto.ca/api/3/action/package_list
- Result
- HTTP 200 · application/json · 21,496 bytes
- Response time
- 154 ms (median of 3) · fastest 151 ms
- Transport
- TLSv1.3 · TLS_AES_128_GCM_SHA256 · certificate issued by Amazon
- Browser CORS
- No Access-Control-Allow-Origin header — call it from a server, not the browser
- Recorded
- 2026-08-10
Fields Returned
Top-level fields present in the response we captured, with the type and value we actually received.
| Field | Type | Value received |
|---|---|---|
| help | string (url) | https://ckan0.cf.opendata.inter.prod-toronto.… |
| success | boolean | true |
| result | array | [1 item] |
Captured Response
Captured from a real request to https://ckan0.cf.opendata.inter.prod-toronto.ca/api/3/action/package_list on 2026-08-10. Long arrays and nested objects are truncated to keep the shape readable.
{
"help": "https://ckan0.cf.opendata.inter.prod-toronto.ca/api/3/action/help_show?name=package_list",
"success": true,
"result": [
"10-year-cycling-network-plan-on-street-2016"
]
} Field Reference
success True if the CKAN API action completed without errors. result The returned data—either a list of package names or a records object depending on the action. Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://ckan0.cf.opendata.inter.prod-toronto.ca/api/3/action/package_list";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
How This API Fails
We deliberately sent this API a broken request and recorded exactly what came back on 2026-08-10. Knowing the shape of an error before you hit it makes error handling much easier to write.
Returned an HTML error page rather than JSON — worth knowing if your client assumes every response can be parsed as JSON.
Common Errors & Troubleshooting
Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.
Measured Score Breakdown
Live HTTP request to the API endpoint
Fully tested on Aug 10, 2026
Technical Specifications
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