ToolVet
80trust / 100

Image Diff

by AgentRXI in Documents & files

x402 APIPassing, checked 2 h ago

Compare two images pixel by pixel (visual regression testing for screenshots): count and percent of differing pixels with a fuzz tolerance, plus a diff image with the changes highlighted in red. Also callable as GET with the same fields as query parameters.

GET
https://agentrxi.com/v1/image/diff
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
69 ms
855 ms slowest 5%
Last check
Passed
2 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

GET https://agentrxi.com/v1/image/diff

Each call costs $0.005 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.

GET https://agentrxi.com/v1/image/diff?url_a=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fa.png&url_b=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fb.png

Parameters

ParameterTypeRequiredDescription
a_base64stringNo
b_base64stringNo
formatstringNobinary = raw file bytes (single output)
fuzznumberNoColour tolerance percent, default 3
no_imagebooleanNo
storebooleanNoReturn 7-day share links instead of base64 (+$0.001); automatic above 3 MB
url_astringNo
url_bstringNo

Example response

The provider's example. We can't check it without paying.

{
  "diff_image": {
    "base64": "...",
    "name": "diff.png"
  },
  "different_pixels": 11309,
  "identical": false,
  "percent_different": 9.42
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://agentrxi.com/v1/image/diff?url_a=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fa.png&url_b=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fb.png'

# 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 - 'https://agentrxi.com/v1/image/diff?url_a=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fa.png&url_b=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fb.png' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagentrxi.com%2Fv1%2Fimage%2Fdiff
const res = await pay("https://agentrxi.com/v1/image/diff?url_a=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fa.png&url_b=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fb.png");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://agentrxi.com/v1/image/diff?url_a=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fa.png&url_b=https%3A%2F%2Fagentrxi.com%2Fsamples%2Fb.png")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402146 ms$0.005
7 h agoPassed40259 ms$0.005
11 h agoPassed402855 ms$0.005
15 h agoPassed40290 ms$0.005
19 h agoPassed40257 ms$0.005
Show 3 older checks
24 h agoPassed40269 ms$0.005
28 h agoPassed402841 ms$0.005
37 h agoPassed40240 ms$0.004

History

15 Oct 2026Price changed from $0.004 to $0.005