Fix Error

{
  "durable_revenue_log": true,
  "input_received": true,
  "mode": "mainnet",
  "network": "eip155:8453",
  "post_payment_retry_path": "Retry POST /fix-error with x402 payment proof.",
  "real_revenue": true,
  "receipt": {
    "generated_at": "2026-06-14T00:00:00.000Z",
    "next_command": "npm install",
    "prevention_note": "Store this error pattern in a runbook and add a preflight check before future runs.",
    "retry_plan": [
      "Confirm the exact failing command.",
      "Run the smallest non-destructive diagnostic command relevant to the error.",
      "Check whether required environment variables, packages, files, or services are present.",
      "Retry the original command once after the minimal fix."
    ],
    "risk_note": "Do not run destructive cleanup, reset, rm, database, credential, or firewall commands without manual review.",
    "root_cause": "The failure appears related to a missing package, missing file, or unresolved module path."
  },
  "request_id": "example-request-id",
  "revenue_proof_log": "paid_fix_error_receipt_issued",
  "service": "Agent Error Fix Receipt",
  "status": "paid",
  "version": "2026-05-25-d1-revenue-log"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.kgninja.dev/fix-error' \
  -H 'content-type: application/json' \
  --data-raw '{"command":"npm run build","environment":"Node.js Cloudflare Worker build","error":"Error: Cannot find module '\''hono'\''"}'

# 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://api.kgninja.dev/fix-error' \
  -H 'content-type: application/json' \
  --data-raw '{"command":"npm run build","environment":"Node.js Cloudflare Worker build","error":"Error: Cannot find module '\''hono'\''"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.kgninja.dev%2Ffix-error&method=POST
const res = await pay("https://api.kgninja.dev/fix-error", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "command": "npm run build",
    "environment": "Node.js Cloudflare Worker build",
    "error": "Error: Cannot find module 'hono'"
  }),
});
console.log(res.status, await res.text());

# 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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.kgninja.dev/fix-error",
        json={
            "command": "npm run build",
            "environment": "Node.js Cloudflare Worker build",
            "error": "Error: Cannot find module 'hono'",
        },
    )
    print(res.status_code, res.text)