Mint a presigned S3 URL the client uploads bytes to

curl --request POST \
  --url 'https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content_type": "image/jpeg",
  "kind": "image"
}
'

import requests

url = "https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token="

payload = {
    "content_type": "image/jpeg",
    "kind": "image"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({content_type: 'image/jpeg', kind: 'image'})
};

fetch('https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=', 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://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=",
  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([
    'content_type' => 'image/jpeg',
    'kind' => 'image'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token="

	payload := strings.NewReader("{\n  \"content_type\": \"image/jpeg\",\n  \"kind\": \"image\"\n}")

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

	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://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=")
  .header("Content-Type", "application/json")
  .body("{\n  \"content_type\": \"image/jpeg\",\n  \"kind\": \"image\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"content_type\": \"image/jpeg\",\n  \"kind\": \"image\"\n}"

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

{
  "upload_url": "https://rial-platform-evidence-staging-977916686093.s3.amazonaws.com/vfy_01HXYZ/cap_01ABC?X-Amz-Signature=...",
  "image_key": "s3://rial-platform-evidence-staging-977916686093/vfy_01HXYZ/cap_01ABC",
  "capture_id": "cap_01ABCDEFGHJKMNPQRSTVWXYZ12",
  "expires_at": "2026-05-28T13:05:00.000Z"
}

{
  "error": {
    "code": "invalid_request",
    "message": "Request body failed validation"
  }
}

{
  "error": {
    "code": "not_found",
    "message": "Resource not found"
  }
}

Captures

Mint a presigned S3 URL the client uploads bytes to

Stage 1 of the upload flow. Returns a single-use presigned PUT URL (5-minute TTL, locked to the specified contentType) the SPA / SDK uploads raw bytes to. Bypassing the Lambda avoids the 6 MB sync-invocation cap; the Lambda only sees the resulting image_key reference on stage 3 (POST /captures).

Auth: the verification id in the path :token IS the credential (same trust model as Stripe payment-intent client_secret). Any caller with the token can mint an upload URL — but the URL is single-use, time-limited, and locked to a specific content-type, so a stolen URL cannot be repurposed.

Capture id assignment: server-side, returned to the client. The same id flows back to the server on POST /captures via the image_key field (the key contains the id), keeping the dashboard’s display logic deterministic.

POST

verifications

{token}

captures

upload-url

Mint a presigned S3 URL the client uploads bytes to

curl --request POST \
  --url 'https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content_type": "image/jpeg",
  "kind": "image"
}
'

import requests

url = "https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token="

payload = {
    "content_type": "image/jpeg",
    "kind": "image"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({content_type: 'image/jpeg', kind: 'image'})
};

fetch('https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=', 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://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=",
  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([
    'content_type' => 'image/jpeg',
    'kind' => 'image'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token="

	payload := strings.NewReader("{\n  \"content_type\": \"image/jpeg\",\n  \"kind\": \"image\"\n}")

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

	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://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=")
  .header("Content-Type", "application/json")
  .body("{\n  \"content_type\": \"image/jpeg\",\n  \"kind\": \"image\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://platform-staging.get-rial.com/v1/verifications/{token}/captures/upload-url?token=")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"content_type\": \"image/jpeg\",\n  \"kind\": \"image\"\n}"

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

{
  "upload_url": "https://rial-platform-evidence-staging-977916686093.s3.amazonaws.com/vfy_01HXYZ/cap_01ABC?X-Amz-Signature=...",
  "image_key": "s3://rial-platform-evidence-staging-977916686093/vfy_01HXYZ/cap_01ABC",
  "capture_id": "cap_01ABCDEFGHJKMNPQRSTVWXYZ12",
  "expires_at": "2026-05-28T13:05:00.000Z"
}

{
  "error": {
    "code": "invalid_request",
    "message": "Request body failed validation"
  }
}

{
  "error": {
    "code": "not_found",
    "message": "Resource not found"
  }
}

Authorizations

token

string

query

required

Possession of the verification id in the URL path (/v1/verifications/:token/...) authenticates the SPA capture flow. No header — the id is the credential. ULIDs are large enough that existence-by-id is not a meaningful leak. Used for POST /captures/upload-url, POST /captures, GET /v1/verify/:token.

Path Parameters

token

string

required

Pattern: ^vfy_[0-9A-HJKMNP-TV-Z]{26}$

Example:

"vfy_01HXYZABCDEFGHJKMNPQRSTVWX"

Body

application/json

Body for POST /v1/verifications/:token/captures/upload-url. The returned presigned PUT URL is single-use, 5-minute TTL, locked to the specified contentType — a stolen URL cannot be repurposed for a different mime.

content_type

string

required

kind

enum<string>

default:image

Available options:

image,

forensic_buffer

Response

Presigned URL minted. Client PUTs bytes here next.

upload_url

string<uri>

required

image_key

string

required

capture_id

string

required

expires_at

string<date-time>

required

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Core concepts

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API reference

Mint a presigned S3 URL the client uploads bytes to

Authorizations

Path Parameters

Body

Response