Get a signed URL for uploading a recording

curl --request POST \
  --url https://api.siro.ai/v1/core/recordings/signed-urls \
  --header 'Content-Type: application/json' \
  --header 'x-siro-auth-token: <api-key>' \
  --data '
{
  "fileType": "<string>",
  "fileSize": 2
}
'

import requests

url = "https://api.siro.ai/v1/core/recordings/signed-urls"

payload = {
    "fileType": "<string>",
    "fileSize": 2
}
headers = {
    "x-siro-auth-token": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-siro-auth-token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({fileType: '<string>', fileSize: 2})
};

fetch('https://api.siro.ai/v1/core/recordings/signed-urls', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.siro.ai/v1/core/recordings/signed-urls",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'fileType' => '<string>',
    'fileSize' => 2
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-siro-auth-token: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.siro.ai/v1/core/recordings/signed-urls"

	payload := strings.NewReader("{\n  \"fileType\": \"<string>\",\n  \"fileSize\": 2\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-siro-auth-token", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.siro.ai/v1/core/recordings/signed-urls")
  .header("x-siro-auth-token", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fileType\": \"<string>\",\n  \"fileSize\": 2\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.siro.ai/v1/core/recordings/signed-urls")

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

request = Net::HTTP::Post.new(url)
request["x-siro-auth-token"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fileType\": \"<string>\",\n  \"fileSize\": 2\n}"

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

{
  "data": {
    "uploadUrl": "<string>",
    "uploadHeaders": {
      "Content-Type": "<string>",
      "x-goog-content-length-range": "<string>"
    },
    "downloadUrl": "<string>",
    "expiresAt": "<string>"
  },
  "cursor": "<string>",
  "pageSize": 123,
  "limit": 123,
  "total": 123,
  "hasNextPage": true
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "issues": [
    {
      "code": "<string>",
      "path": [
        "<string>"
      ],
      "message": "<string>",
      "expected": "<string>",
      "received": "<string>"
    }
  ],
  "name": "ZodError"
}

{
  "error": "<string>"
}

POST

core

recordings

signed-urls

Get a signed URL for uploading a recording

curl --request POST \
  --url https://api.siro.ai/v1/core/recordings/signed-urls \
  --header 'Content-Type: application/json' \
  --header 'x-siro-auth-token: <api-key>' \
  --data '
{
  "fileType": "<string>",
  "fileSize": 2
}
'

import requests

url = "https://api.siro.ai/v1/core/recordings/signed-urls"

payload = {
    "fileType": "<string>",
    "fileSize": 2
}
headers = {
    "x-siro-auth-token": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-siro-auth-token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({fileType: '<string>', fileSize: 2})
};

fetch('https://api.siro.ai/v1/core/recordings/signed-urls', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.siro.ai/v1/core/recordings/signed-urls",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'fileType' => '<string>',
    'fileSize' => 2
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-siro-auth-token: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.siro.ai/v1/core/recordings/signed-urls"

	payload := strings.NewReader("{\n  \"fileType\": \"<string>\",\n  \"fileSize\": 2\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-siro-auth-token", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.siro.ai/v1/core/recordings/signed-urls")
  .header("x-siro-auth-token", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fileType\": \"<string>\",\n  \"fileSize\": 2\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.siro.ai/v1/core/recordings/signed-urls")

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

request = Net::HTTP::Post.new(url)
request["x-siro-auth-token"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fileType\": \"<string>\",\n  \"fileSize\": 2\n}"

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

{
  "data": {
    "uploadUrl": "<string>",
    "uploadHeaders": {
      "Content-Type": "<string>",
      "x-goog-content-length-range": "<string>"
    },
    "downloadUrl": "<string>",
    "expiresAt": "<string>"
  },
  "cursor": "<string>",
  "pageSize": 123,
  "limit": 123,
  "total": 123,
  "hasNextPage": true
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "issues": [
    {
      "code": "<string>",
      "path": [
        "<string>"
      ],
      "message": "<string>",
      "expected": "<string>",
      "received": "<string>"
    }
  ],
  "name": "ZodError"
}

{
  "error": "<string>"
}

Generates a short-lived signed upload URL for an audio file plus a matching download URL. This is the first step of the direct-upload flow: upload your audio to cloud storage with uploadUrl, then pass downloadUrl as fileUrl to Post recordings upload to create the recording.

Response fields

Field	Description
`uploadUrl`	Signed URL to `PUT` the file body to (Google Cloud Storage).
`uploadHeaders`	Headers you must send with the `PUT` — see below.
`downloadUrl`	Pass this as `fileUrl` when creating the recording.
`expiresAt`	When the signed URLs expire (ISO 8601). Upload before this time.

Required upload headers

The values of Content-Type and x-goog-content-length-range are baked into the signature of uploadUrl. You must send them exactly as returned in uploadHeaders, or GCS rejects the upload with a 403 SignatureDoesNotMatch.

Content-Type — the MIME type for the fileType you requested. Siro maps extensions as follows:
fileType Content-Type
mp3 audio/mpeg
wav audio/wav
aac audio/aac
x-goog-content-length-range — 0,<fileSize>, where <fileSize> is the exact byte size you passed in the request. The uploaded body must fall within this range.

`fileType`	`Content-Type`
`mp3`	`audio/mpeg`
`wav`	`audio/wav`
`aac`	`audio/aac`

Example upload

# 1. Request the signed URLs
curl -X POST https://api.siro.ai/v1/core/recordings/signed-urls \
  -H "x-siro-auth-token: $SIRO_OAUTH_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"fileType": "mp3", "fileSize": 1048576}'

# Response:
# {
#   "data": {
#     "uploadUrl": "https://storage.googleapis.com/...",
#     "uploadHeaders": {
#       "Content-Type": "audio/mpeg",
#       "x-goog-content-length-range": "0,1048576"
#     },
#     "downloadUrl": "https://storage.googleapis.com/...",
#     "expiresAt": "2026-06-08T12:00:00.000Z"
#   }
# }

# 2. PUT the file to uploadUrl, echoing uploadHeaders verbatim
curl -X PUT "$UPLOAD_URL" \
  -H "Content-Type: audio/mpeg" \
  -H "x-goog-content-length-range: 0,1048576" \
  --data-binary @recording.mp3

Then call Post recordings upload with fileUrl set to downloadUrl.

Authorizations

x-siro-auth-token

string

header

default:<oauth-access-token>

required

OAuth access token for user-scoped requests (Authorization Code or machine-to-machine). Send header x-siro-auth-token: <oauth-access-token>. Not an organization API key.

Body

application/json

fileType

string

required

File type (limited to mp3, aac, wav)

fileSize

integer

required

Size of the file in bytes

Required range: x >= 1

Response

Get a signed URL for uploading a recording

data

object

required

Show child attributes

cursor

pageSize

number

limit

number

total

number | null

hasNextPage

boolean

Get followups Create a recording from a phone call

⌘I

Org-wide API

User-scoped API

Webhooks

Get a signed URL for uploading a recording

Response fields

Required upload headers

Example upload

Authorizations

Body

Response

​Response fields

​Required upload headers

​Example upload

Authorizations

Body

Response

Response fields

Required upload headers

Example upload