ToolVet
78trust / 100

Keyframes

by medien.halowerk.com in Developer tools

x402 APIPassing, checked 4 h ago

Takes a video by URL or inline base64 and reports where the picture changes. FFmpeg measures the difference between consecutive frames; every jump above the threshold starts a new scene, and the answer lists each scene with start, end, duration and the fraction of the running time it covers, plus the raw detection score positions.

POST
https://medien.halowerk.com/v1/keyframes
Price
$0.03
per call in USDC
Uptime
100%
last 30 days
Response time
115 ms
209 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://medien.halowerk.com/v1/keyframes

Each call costs $0.03 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://medien.halowerk.com/v1/keyframes
content-type: application/json

{
  "duration_minutes": 3,
  "include_thumbnails": true,
  "scene_threshold": 0.35,
  "source": {
    "url": "https://example.com/film.mp4"
  }
}

Parameters

ParameterTypeRequiredDescription
duration_minutesintegerNoLength of the video in started minutes — this is what you are billed for. A longer video is refused with its real duration and nothing is charged; a shorter one simply costs what you declared, and the answer says how much less it would have been. Default: 1.
include_thumbnailsbooleanNoRender one JPEG per scene and return it base64. Default: false.
max_scenesintegerNoCeiling on returned scenes. What is dropped is counted and reported. Default: 100.
max_thumbnailsintegerNoCeiling on rendered thumbnails, independent of the scene count. Default: 20.
min_scene_secondsnumberNoMerge cuts closer together than this. Guards against flicker being read as a cut. Default: 0.4.
scene_thresholdnumberNoFrame-to-frame difference above which a new scene starts. Lower finds more, higher finds fewer. Default: 0.35.
sourceobjectYesThe video. Either url or content_base64.
thumbnail_widthintegerNoWidth of the thumbnails; height follows the aspect ratio. Default: 160.

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.03.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://medien.halowerk.com/v1/keyframes' \
  -H 'content-type: application/json' \
  --data-raw '{"duration_minutes":3,"include_thumbnails":true,"scene_threshold":0.35,"source":{"url":"https://example.com/film.mp4"}}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://medien.halowerk.com/v1/keyframes' \
  -H 'content-type: application/json' \
  --data-raw '{"duration_minutes":3,"include_thumbnails":true,"scene_threshold":0.35,"source":{"url":"https://example.com/film.mp4"}}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmedien.halowerk.com%2Fv1%2Fkeyframes&method=POST
const res = await pay("https://medien.halowerk.com/v1/keyframes", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "duration_minutes": 3,
    "include_thumbnails": true,
    "scene_threshold": 0.35,
    "source": {
      "url": "https://example.com/film.mp4"
    }
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://medien.halowerk.com/v1/keyframes",
        json={
            "duration_minutes": 3,
            "include_thumbnails": True,
            "scene_threshold": 0.35,
            "source": {
                "url": "https://example.com/film.mp4",
            },
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402142 ms$0.03
8 h agoPassed40295 ms$0.03
12 h agoPassed402107 ms$0.03
17 h agoPassed402115 ms$0.03
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Show 10 older checks
25 h agoPassed402102 ms$0.03
29 h agoPassed402114 ms$0.03
34 h agoPassed402107 ms$0.03
38 h agoPassed40231 ms$0.03
42 h agoPassed402128 ms$0.03
46 h agoPassed402155 ms$0.03
2 days agoPassed40231 ms$0.03
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2 days agoPassed402188 ms$0.03
3 days agoPassed402128 ms$0.03