> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.defdex.io/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.defdex.io/_mcp/server.

# List datasets

GET https://app.defdex.io/api/v1/datasets

Discover all published collections, field types, identity and required filters. Requires data:read.

Reference: https://docs.defdex.io/api-reference/catalog-and-generic-access/list-datasets

## Authentication

- `Authorization` header (bearer token, required) — Create a scoped key at https://app.defdex.io/developer/keys. Keep it private.

## Response

### 200

Success

- `build_id` (string, required)
- `data` (list of CatalogDataItems, required)

## Errors

### 400 Bad Request Error

Invalid query, typed filter, cursor or query exceeds the database budget. Narrow exact filters.

- `error` (string, required)

### 401 Unauthorized Error

Missing, invalid or revoked key.

- `error` (string, required)

### 403 Forbidden Error

Key lacks the required scope.

- `error` (string, required)

### 404 Not Found Error

Unknown dataset, record or account-owned proposal.

- `error` (string, required)

### 409 Conflict Error

Build changed during a read, a build-scoped cursor expired, or an idempotency key conflicts.

- `error` (string, required)

### 429 Too Many Requests Error

Account request limit or correction submission limit reached.

- `error` (string, required)

### 503 Service Unavailable Error

Service temporarily unavailable.

- `error` (string, required)

## Types

### CatalogDataItems

- `name` (enum, required)
  - Allowed values: `agency-award-summaries`, `agency-summary-totals`, `award-facets`, `award-fiscal-years`, `award-provider-observations`, `award-summaries`, `awards`, `baseline-years`, `blog-posts`, `blog-topics`, `budget-figures`, `budget-obligation-links`, `budget-obligations`, `budget-trackers`, `citations`, `corrections`, `costs`, `entities`, `events`, `facilities`, `funding-round-participants`, `funding-rounds`, `input-dependencies`, `input-designations`, `inputs`, `investor-mandates`, `job-postings`, `joint-venture-partners`, `market-listings`, `market-structure-years`, `metric-observations`, `news-feed`, `office-commands`, `organization-guides`, `organization-identifiers`, `organization-inputs`, `organization-metrics`, `organization-redirects`, `organization-supplier-roles`, `organization-technologies`, `organizations`, `people`, `program-award-evidence`, `program-award-memberships`, `program-facilities`, `program-obligation-method`, `program-obligation-totals`, `program-obligations`, `program-operators`, `program-participants`, `program-systems`, `programs`, `recipient-award-summaries`, `ref-award-types`, `ref-competition-types`, `ref-countries`, `ref-fx-monthly`, `ref-naics-codes`, `ref-pricing-types`, `ref-product-service-codes`, `ref-program-codes`, `ref-set-aside-types`, `ref-states`, `referenced-awards`, `roles`, `sbir-cohort-phase3`, `sbir-cohorts`, `sbir-company-phases`, `sbir-fpds-years`, `sbir-generation`, `sbir-gov-years`, `sbir-sources`, `source-mentions`, `sources`, `summary-agency-award-counts`, `summary-award-actions`, `summary-award-place-sets`, `summary-award-program-code-years`, `summary-award-program-codes`, `summary-awards`, `summary-company-contract-award-counts`, `summary-company-fiscal-years`, `summary-fy-totals`, `summary-generation`, `summary-office-fy-totals`, `summary-recipient-first-positive-fy`, `summary-recipients`, `summary-reviewed-award-years`, `supply-relationships`, `system-components`, `system-inputs`, `system-milestones`, `system-technologies`, `systems`, `technologies`, `technology-inputs`, `trade-controls`
- `fields` (map from string to string, required) — Allowed output and exact-filter fields mapped to database type labels.
- `keys` (list of string, required)
- `identity` (enum, required)
  - Allowed values: `stable-key`, `build-scoped-position`
- `required_filters` (list of string, required)

## Examples

**Response**

```json
{
  "build_id": "string",
  "data": [
    {
      "name": "agency-award-summaries",
      "fields": {},
      "keys": [
        "string"
      ],
      "identity": "stable-key",
      "required_filters": [
        "string"
      ]
    }
  ]
}
```

**SDK Code**

```python
import requests

url = "https://app.defdex.io/api/v1/datasets"

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers)

print(response.json())
```

```javascript
const url = 'https://app.defdex.io/api/v1/datasets';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://app.defdex.io/api/v1/datasets"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://app.defdex.io/api/v1/datasets")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://app.defdex.io/api/v1/datasets")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://app.defdex.io/api/v1/datasets', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://app.defdex.io/api/v1/datasets");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://app.defdex.io/api/v1/datasets")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```