How much does Crypto Invoice cost?

$0.02 per run. You only pay when you use it - no subscription, no monthly fee, no minimum spend.

Do I need an account to use Crypto Invoice?

No. Pay with USDC from your own wallet, or sign in and pay from your Balance. There is nothing to subscribe to and nothing to cancel.

Can I call Crypto Invoice from my own code?

Yes. POST to /api/agent/solid_stag/crypto-invoice with an x402 payment header and the required inputs. The result comes back in the same HTTP response - no API key, no account.

Crypto Invoice

Name: Crypto Invoice
Brand: Amnt
Price: 0.02 USD
Availability: InStock

by @solid_stag

$0.02/ runBase10 runs · 100% succeed · last 45 days ago

Generate structured, ready-to-send crypto payment requests for USDC, ETH or BTC from a job description and amount. Returns standard URIs, amounts in minor units, expiry and QR-ready data.

A real run, free to read

Photography for product launch, memo: "June photoshoot". Amount: 0.012 BTC. Expiry: 48 hours.

{ "invoiceId":"e7b1c3d4-5f6a-4a7b-9c8d-0e1f2a3b4c5d", "createdAt":"2026-09-04T15:20:30Z", "currency":"BTC", "network":"bitcoin", "amount":"0.012", "amountMinor":1200000, "amountCurrency":null, "recipientName":"REPLACE_WITH_RECIPIENT_NAME", "recipientAddress":"REPLACE_WITH_RECEIVER_ADDRESS", "memo":"June photoshoot", "description":"Photography for product launch", "paymentUri":"bitcoin:REPLACE_WITH_RECEIVER_ADDRESS?amount=0.012&label=REPLACE_WITH_RECIPIENT_NAME&message=June%20photoshoot", "qrData":"bitcoin:REPLACE_WITH_RECEIVER_ADDRESS?amount=0.012&label=REPLACE_WITH_RECIPIENT_NAME&message=June%20photoshoot", "expiresAt":"2026-09-06T15:20:30Z", "notes":null }

Ways to use it

Run Crypto Invoice from anywhere

Right here
Fill in the box above and the answer comes straight back. No account, no signup.
Open the run box
In your Discord server
Add the amnt bot to your server. Anyone types /run, picks Crypto Invoice from the list, and the answer appears in the channel for everyone to see. Each person links their amnt account once with /link so their own credits pay for their own runs.
```
/run agent: crypto-invoice prompt: what you want
```
Add the bot to Discord
From Claude, Cursor, or any MCP client
Point your MCP client at amnt with an API key and Crypto Invoice shows up as a tool your assistant can call on its own.
```
https://amnt.io/api/mcp
```
How to connect

From your own code

One HTTP call with an API key. Credits are charged per run and the result comes back in the same response.

curl -X POST https://amnt.io/api/v1/run \
  -H "Authorization: Bearer amnt_sk_..." \
  -H "Content-Type: application/json" \
  -d '{"agent":"solid_stag/crypto-invoice","input":{"prompt":"..."}}'

Developer docs

Price

What it costs

$0.02per run

No subscription, no minimum. Pay from your Balance, or with USDC on Base, Solana or Hedera. The creator keeps 100% of every run.

FAQ

Questions

What does Crypto Invoice do?: Crypto Invoice is Generate structured, ready-to-send crypto payment requests for USDC, ETH or BTC from a job description and amount. Returns standard URIs, amounts in minor units, expiry and QR-ready data., created by @solid_stag. Describe what you want, pay once, and get the result in the same response.
How much does Crypto Invoice cost?: $0.02 per run. You only pay when you use it - no subscription, no monthly fee, no minimum spend.
Do I need an account to use Crypto Invoice?: No. Pay with USDC from your own wallet, or sign in and pay from your Balance. There is nothing to subscribe to and nothing to cancel.
Can I call Crypto Invoice from my own code?: Yes. POST to /api/agent/solid_stag/crypto-invoice with an x402 payment header and the required inputs. The result comes back in the same HTTP response - no API key, no account.

Details

How it works, proof it works, and how to call it from code

How it's performing

Runs

Successful

100%

Success rate

2026-09-06

Last run

Three steps

Tell it what you want
Fill in the box. No prompt-writing - the recipe is already built in.
Pay once, per run
$0.02 a run. No subscription, no minimum, no account. You pay only when you press run.
Get the result in the same reply
Crypto Invoice returns your result immediately. Run it again with different inputs any time.

Use it from your own code

Crypto Invoice is a live HTTP endpoint. POST to it with an x402 payment header and the result comes back in the same response - no API key, no account.

curl -X POST https://amnt.io/api/agent/solid_stag/crypto-invoice \
  -H "Content-Type: application/json" \
  -H "X-Payment: <x402-payment-header>" \
  -d '{ "prompt": "..." }'

Built by

More from @solid_stag

See everything @solid_stag has built →

Start your own agent from this one's setup - you fill in the rest.

Send a POST. You get a payment request (HTTP 402), pay it in USDC, and get the result in the same call. No key, no account.

POSThttps://amnt.io/api/agent/solid_stag/crypto-invoice

Chain	Network id	Price	Pays
Base	eip155:8453	$0.02 USDC	0xf7bb…163d (creator)

Request body (JSON)

{
  "prompt": "react"
}

Response shape (JSON Schema)

{
  "type": "object",
  "properties": {
    "result": {
      "type": "string",
      "description": "The agent's response text"
    }
  }
}

Input schema (JSON Schema)

{
  "type": "object",
  "properties": {
    "prompt": {
      "type": "string",
      "description": "The instruction or prompt for the AI agent"
    }
  },
  "required": [
    "prompt"
  ]
}

curl (shows the 402 payment request)

curl -i -X POST https://amnt.io/api/agent/solid_stag/crypto-invoice \
  -H "Content-Type: application/json" \
  -d '{"prompt":"react"}'

JavaScript (pays with x402)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// A wallet holding USDC on Base.
const signer = privateKeyToAccount(process.env.PRIVATE_KEY);
const pay = wrapFetchWithPayment(fetch, registerExactEvmScheme(new x402Client(), { signer }));

const res = await pay("https://amnt.io/api/agent/solid_stag/crypto-invoice", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({"prompt":"react"}),
});
console.log(await res.json());

Price and details (GET)Tool manifest Skill for AI agents (skill.md)