curl --request GET \
  --url https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/changes \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/changes"

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

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

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/changes', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

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

func main() {

	url := "https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/changes"

	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(string(body))

}

{
  "actId": "CFR_T21_P314_S314_50",
  "section": {
    "actId": "CFR_T21_P314_S314_50",
    "citation": "21 C.F.R. § 314.50",
    "title": "Content and format of an NDA",
    "corpusType": "CFR",
    "state": "federal"
  },
  "changes": [
    {
      "id": 91,
      "changeKind": "amended",
      "detectedAt": "2026-08-07T04:10:00Z",
      "citation": "21 CFR 314.50",
      "displayCitation": "21 C.F.R. § 314.50",
      "title": "Content and format of an NDA",
      "hasDiff": true,
      "corpusType": "cfr"
    }
  ],
  "total": 1,
  "hasMore": false,
  "cursor": 91,
  "coverage": "Observed changes only: what a refresh of this source detected, from when change capture began for it through today, retained 5 years. This is not the section's legislative history, and an empty list means no captured change rather than never amended.",
  "processingTimeMs": 18.4,
  "creditsConsumed": 1
}

{
  "detail": "Insufficient API credits.",
  "errors": [
    {
      "loc": [
        "body",
        "corpusType"
      ],
      "msg": "Input should be 'USC', 'CFR' or 'STATE'",
      "type": "literal_error"
    }
  ]
}

{
  "detail": "Insufficient API credits.",
  "errors": [
    {
      "loc": [
        "body",
        "corpusType"
      ],
      "msg": "Input should be 'USC', 'CFR' or 'STATE'",
      "type": "literal_error"
    }
  ]
}

{
  "detail": "Section not found. This id does not exist, but the section does, ...",
  "actId": "<string>",
  "reason": "assembled_id",
  "didYouMean": [
    "USC_T26_C1_S1"
  ]
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}

{
  "detail": "Insufficient API credits.",
  "errors": [
    {
      "loc": [
        "body",
        "corpusType"
      ],
      "msg": "Input should be 'USC', 'CFR' or 'STATE'",
      "type": "literal_error"
    }
  ]
}