# ODN API

**Provider:** ODN
**Category:** ai
**Base URL:** `http://api.opendatanetwork.com`
**Auth:** none — `# No auth required`
**Rate Limit:** See documentation
**Free Tier:** Yes — available
**Pricing:** Enterprise / contact sales (subscription)
**Docs:** http://api.opendatanetwork.com

## Description

The Socrata OpenDataNetwork (ODN) REST API exposes public data, often continuosly updated and enhanced, from many thousands of public
government and non profit agencies.

Much of this data originating from independent sources is fused together to create new, and often
powerful, entity level data. Th

## Endpoints

| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `http://api.opendatanetwork.com/data/v1/availability/` | Find all available data for some entities |
| GET | `http://api.opendatanetwork.com/data/v1/constraint/{variable}` | Get constraint permutations for entities |
| GET | `http://api.opendatanetwork.com/data/v1/map/new` | Create a map |
| GET | `http://api.opendatanetwork.com/data/v1/values` | Get values for variables |
| GET | `http://api.opendatanetwork.com/entity/v1` | Get Entities |
| GET | `http://api.opendatanetwork.com/entity/v1/{relation}` | Find the relatives of an entity |
| GET | `http://api.opendatanetwork.com/search/v1/dataset` | Get datasets |
| GET | `http://api.opendatanetwork.com/search/v1/question` | Get questions |

## Authentication

No authentication required

```
# No auth required
```

## Sample Request

```bash
curl -X GET 'http://api.opendatanetwork.com/data/v1/availability/' \
  -H '# No auth required'
```

## Sample Response

```json
{}
```

## Pricing Details

Free — open public API, no authentication required.

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*Source: [API Map](https://apimap.dev/apis/odn/) — CC BY 4.0*