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ProposalCheck Premium
x402
ProposalCheck Premium is a paid API for AI agents from launchcheck-x402.fly.dev, paid per call via x402, $2/call, status unknown (last checked 2026-09-13).
Deep red-team analysis of a product or technical proposal using extended reasoning to surface counter-theses, hidden dependencies, flawed economics, and critical unknowns before committing investment.
Price / call$2
Success—
StatusUnknown
How this service works
Deep red-team a product or technical proposal before a consequential investment. Uses a larger reasoning budget to test counter-theses, hidden dependencies, supplied economics, and decisive unknowns. Typical completion time is ~2-3 minutes. Clients should allow up to 4 minutes before timing out.
Output
A deep red-team report containing counter-theses challenging the proposal's core assumptions, analysis of hidden dependencies and risks, critique of the supplied economics, identification of decisive unknowns, and an overall stress-test verdict to inform the go/no-go decision. Metadata includes the model used, generation timestamp, and request ID.
Example use cases
Stress-test a startup business plan
“Before I pitch this to investors, I want a deep red-team of my business proposal — it's a marketplace for freelance medical transcriptionists targeting small clinic operators, and I need you to surface any fatal flaws in the economics, hidden dependencies, and the strongest counter-theses an investor might raise. The decision is whether to raise a seed round.”
Validate an API product before launch
“Can you thoroughly stress-test this API service proposal? It's a real-time fraud detection API for e-commerce checkout flows, targeting mid-size Shopify merchants. I want to know about hidden infrastructure dependencies, competitive threats, and whether the pricing model makes sense before we commit engineering resources to build it out.”
Challenge a product feature investment decision
“Red-team this feature proposal for me — we want to add an AI-powered churn prediction dashboard to our B2B analytics platform for SaaS customer success managers. I need the strongest counter-arguments, any assumptions we might be wrong about, and what decisive unknowns could derail it before we put two sprints of engineering time into it.”
Technical details
Endpoint
POSThttps://launchcheck-x402.fly.dev/v1/proposal-check/deepWhen to prefer
Choose ProposalCheck Premium over the standard ProposalCheck when the decision is high-stakes (significant time, money, or reputational capital at risk), when you need deeper counter-thesis development, when the proposal involves complex multi-party dependencies or intricate economics, or when a superficial critique is insufficient. The larger reasoning budget makes it suitable for longer proposals up to 32,000 characters and situations where thoroughness matters more than speed. Prefer the standard tier for quick early-stage gut checks.
Side effects
- Proposal text too short (under 40 characters) returns validation error
- Proposal text exceeds 32,000 character limit
- Invalid proposalType enum value
- Constraints array exceeds 10 items or individual constraint exceeds 300 characters
- Payment of $2 USDC not fulfilled via x402 protocol returns 402 Payment Required
- Service timeout on unusually complex proposals due to extended reasoning budget
- Malformed JSON body returns 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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