ToolVet
75trust / 100

Image Generations

by payperwork in AI models & inference

x402 APIPassing, checked 2 h ago

Image generation for agents: a prompt in, one image out (base64), on GPT Image or Gemini image models.

POST
https://payperwork.app/image/v1/generations
Price
$0.048
per call in USDC
Uptime
100%
last 30 days
Response time
412 ms
412 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

POST https://payperwork.app/image/v1/generations

Each call costs $0.0476 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://payperwork.app/image/v1/generations
content-type: application/json

{
  "aspect_ratio": "16:9",
  "model": "google/nano-banana-2.1",
  "prompt": "A paper airplane made of a dollar bill, flying over a city at dusk, soft light.",
  "resolution": "1K"
}

Parameters

ParameterTypeRequiredDescription
aspect_ratiostringNo
modelstringNo
output_formatstringNo One of: png, jpeg, webp.
promptstringYes
qualitystringNo One of: low, medium, high.
resolutionstringNo One of: 1K, 2K, 4K.
sizestringNo One of: 1024x1024, 1024x1536, 1536x1024.

Example response

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

{
  "created": 1793600000,
  "data": [
    {
      "b64_json": "iVBORw0KGgo...",
      "mime_type": "image/png"
    }
  ],
  "model": "google/nano-banana-2.1"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.0476.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://payperwork.app/image/v1/generations' \
  -H 'content-type: application/json' \
  --data-raw '{"aspect_ratio":"16:9","model":"google/nano-banana-2.1","prompt":"A paper airplane made of a dollar bill, flying over a city at dusk, soft light.","resolution":"1K"}'

# 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://payperwork.app/image/v1/generations' \
  -H 'content-type: application/json' \
  --data-raw '{"aspect_ratio":"16:9","model":"google/nano-banana-2.1","prompt":"A paper airplane made of a dollar bill, flying over a city at dusk, soft light.","resolution":"1K"}' \
  | 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 $0.0476 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0476" });
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 $0.0476 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpayperwork.app%2Fimage%2Fv1%2Fgenerations&method=POST
const res = await pay("https://payperwork.app/image/v1/generations", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "aspect_ratio": "16:9",
    "model": "google/nano-banana-2.1",
    "prompt": "A paper airplane made of a dollar bill, flying over a city at dusk, soft light.",
    "resolution": "1K"
  }),
});
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 $0.0476 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0476"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://payperwork.app/image/v1/generations",
        json={
            "aspect_ratio": "16:9",
            "model": "google/nano-banana-2.1",
            "prompt": "A paper airplane made of a dollar bill, flying over a city at dusk, soft light.",
            "resolution": "1K",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402412 ms$0.048