There is no built-in Google Sheets connector. You have three ways to get missed calls into a sheet:

Download the CSV and import it. Free with no webhook set. See CSV Export.
Ask us to set it up: we connect a sheet for your account on request. Tell us on the Missed Call Service page.
Build it yourself with Google Apps Script, as below. It takes about 10 minutes.

1. Prepare the sheet#

Create a Google Sheet with these headers in row 1:

received_at | from | to | number_name | call_sid

2. Add the script#

In the sheet choose Extensions > Apps Script, replace the code with this, and save:

function doPost(e) {
  var event = JSON.parse(e.postData.contents);
  if (event.event !== "call.missed") {
    return ContentService.createTextOutput("ignored");
  }

  var d = event.data;
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheets()[0];

  // Skip retries and replays of an event already written.
  var sids = sheet.getRange("E:E").getValues().flat();
  if (sids.indexOf(d.call_sid) === -1) {
    sheet.appendRow([event.timestamp, d.from, d.to, d.phone_number_name, d.call_sid]);
  }
  return ContentService.createTextOutput("ok");
}

3. Deploy it as a web app#

Choose Deploy > New deployment, type Web app.
Execute as Me; who has access: Anyone.
Deploy, authorise, and copy the web app URL (https://script.google.com/macros/s/.../exec).

4. Point the webhook at it#

In missedcall.edesy.in open Webhook, paste the web app URL (the one ending in /exec) and save. Click Send test: it should report delivered. Then give your number a missed call and check that a row appears. Read the limits below before using this for a live campaign.

Limits of the DIY route#

Apps Script cannot read request headers, so it cannot check X-Edesy-Signature. Keep the web app URL private; anyone with it can add rows.
Redirects. An Apps Script web app runs your doPost and then answers with a redirect to script.googleusercontent.com. Our webhook follows that one redirect, so deliveries show as delivered. Use the https://script.google.com/macros/s/.../exec URL itself: a shortened or custom-domain link to it redirects elsewhere first, and that redirect is not followed. The call_sid check above keeps retries and replays from adding duplicate rows.
Want the signature checked too? Put a small relay of your own in front of the sheet (see Connect Your CRM) or ask us to set it up.
Apps Script has daily quotas. For large campaigns, use the CSV export or a proper database.
timestamp is UTC. Format the column in the sheet if you want IST.