Query Chicago's 311 Service Requests dataset via the Socrata SODA API on the Chicago Data Portal
domain: data.cityofchicago.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Identify the current 311 Service Requests dataset ID (v6vf-nfxy) on the Chicago Data Portal
Call GET https://data.cityofchicago.org/resource/{dataset_id}.json with SoQL parameters ($where, $select, $limit) to filter by date, status, or request type
Include an X-App-Token header with a Socrata application token to avoid low-throughput IP-based throttling
For complaint types tracked separately (e.g. historical sanitation code complaints), query the corresponding legacy dataset ID instead of assuming all types are in the primary dataset
Paginate with $limit/$offset for full extracts, since the Chicago 311 dataset is large and updated frequently
Known gotchas
The current 311 Service Requests dataset (v6vf-nfxy) only contains requests created after Chicago's new 311 system launched on 12/18/2018, plus some carried-over records; earlier history and certain complaint categories live in separate legacy dataset IDs
Socrata dataset IDs are portal-specific and unique per table, so a dataset ID copied from another city's open-data portal will not resolve on Chicago's domain
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