Proposal Check Deep

{
  "meta": {
    "cached": false,
    "engine": "openai-compatible",
    "generatedAt": "2026-08-17T16:00:00.000Z",
    "model": "openai/gpt-5.6-sol"
  },
  "report": {
    "assumptions": [],
    "coreThesis": "Earn the build with cheaper evidence first.",
    "differentiationAssessment": {
      "keyQuestion": null,
      "rating": "credible",
      "summary": "The thesis may be differentiated if the dependency holds."
    },
    "economicsAssessment": {
      "keyQuestion": null,
      "rating": "unclear",
      "summary": "Measure actual cost before scaling."
    },
    "executiveSummary": "Validate the decisive dependency before implementation.",
    "feasibilityAssessment": {
      "keyQuestion": null,
      "rating": "credible",
      "summary": "A bounded validation step is feasible."
    },
    "inputIntegrity": {
      "evidence": [],
      "status": "clean"
    },
    "killCriteria": [],
    "optionalImprovements": [],
    "recommendation": "Revise around one decisive validation gate.",
    "recommendedBuildSequence": [],
    "requiredChanges": [
      "Run the dependency gate."
    ],
    "risks": [],
    "scopeCuts": [],
    "score": 76,
    "strengths": [],
    "validationPlan": [],
    "verdict": "revise"
  },
  "requestId": "deep-example"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://launchcheck-x402.fly.dev/v1/proposal-check/deep' \
  -H 'content-type: application/json' \
  --data-raw '{"constraints":[],"desiredDecision":"Decide whether the next bounded investment is justified.","proposal":"Build a bounded paid API, validate the decisive dependency first, measure cost and repeat demand, and stop if the gate fails.","proposalType":"api-service"}'

# 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://launchcheck-x402.fly.dev/v1/proposal-check/deep' \
  -H 'content-type: application/json' \
  --data-raw '{"constraints":[],"desiredDecision":"Decide whether the next bounded investment is justified.","proposal":"Build a bounded paid API, validate the decisive dependency first, measure cost and repeat demand, and stop if the gate fails.","proposalType":"api-service"}' \
  | 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 $2 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$2" });
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 $2 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Flaunchcheck-x402.fly.dev%2Fv1%2Fproposal-check%2Fdeep&method=POST
const res = await pay("https://launchcheck-x402.fly.dev/v1/proposal-check/deep", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "constraints": [],
    "desiredDecision": "Decide whether the next bounded investment is justified.",
    "proposal": "Build a bounded paid API, validate the decisive dependency first, measure cost and repeat demand, and stop if the gate fails.",
    "proposalType": "api-service"
  }),
});
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 $2 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$2"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://launchcheck-x402.fly.dev/v1/proposal-check/deep",
        json={
            "constraints": [],
            "desiredDecision": "Decide whether the next bounded investment is justified.",
            "proposal": "Build a bounded paid API, validate the decisive dependency first, measure cost and repeat demand, and stop if the gate fails.",
            "proposalType": "api-service",
        },
    )
    print(res.status_code, res.text)