passlisted in Coinbase#1 by calls of 3 on this host
1 USDC
per call, as the listing declares it on eip155:
- Validation state
- pass
- Uptime, 7 / 30 / 90 days
- 100% / 100% / 100%
- Calls, trailing 30 days
- 11
- Unique payers, trailing 30 days
- 1
- Last called
- 2026-08-19 21:36 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 1 USDC
- Networks
- 1
How has the volume on this endpoint moved?
launchcheck-x402.fly.dev serves proposal check, a POST endpoint that TOLL places in the "other" category, listed in the Coinbase registry.
A call to proposal check costs 1 USDC on Base, as declared.
The request to proposal check is a json body with the fields proposal, constraints, proposalType, productContext, targetAudience and desiredDecision.
proposal check returns json; the example shows meta, report and requestId.
The daily sweep got a valid payment challenge from proposal check on 2026-09-15, as at every sweep since 2026-09-11.
proposal check is one of 3 listed endpoints on launchcheck-x402.fly.dev, 1st by calls among them.
proposal check takes 50% of the calls counted across launchcheck-x402.fly.dev.
Over 30 days: 11 calls, one payer.
proposal check was last called 27 days before the snapshot.
Closest in price to proposal check within the "other" category: apps renew at agents.withzero.xyz and calculate at strategic-divergence-engine.johntaylor1online.workers.dev.
proposal check is near the top of prices in the "other" category; 99% of comparable listings are cheaper.
proposal check out-counts 97% of the 2,777 endpoints in the "other" category that carry counters.
The wallet paid by proposal check is the payee of 3 endpoints on one host.
The seller's tags on proposal check are proposal-review, product-validation, product-strategy and technical-review.
the payment options, as of 2026-09-15 16:57 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 1 USDC | exact | 0x87F929…28DBa4 |
the checks, as of 2026-09-15 07:03 UTC · method · pinnableendpoint answered HTTP 402
No named check failed.
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-09-15 07:03 UTC | pass | 0 | daily-2026-09-15 |
| 2026-09-14 06:30 UTC | pass | 0 | daily-2026-09-14 |
| 2026-09-13 06:19 UTC | pass | 0 | daily-2026-09-13 |
| 2026-09-12 10:07 UTC | pass | 0 | daily-2026-09-12 |
| 2026-09-11 14:48 UTC | pass | 0 | daily-2026-09-11 |
Presence in a registry, not liveness of the service (method). Newest first.
- listed in Coinbase
From the registry record, not validated by TOLL.the declared schema, as of 2026-08-19 21:36 UTC · method · live
The input and output block
{
"input": {
"body": {
"proposal": "Build a narrow paid API that evaluates product proposals before engineering begins. Start with one structured review endpoint, measure real inference cost and repeat buyer behavior, and stop investing if unrelated buyers do not return after the first validation window.",
"constraints": [
"Do not invent traction or external market facts"
],
"proposalType": "api-service",
"productContext": "An x402-paid sibling endpoint to an existing launch-copy review service.",
"targetAudience": "Founders, product teams, developers, and autonomous agents.",
"desiredDecision": "Decide whether to green-light the bounded MVP implementation."
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"meta": {
"model": "openai/gpt-5.6-terra",
"cached": false,
"engine": "openai-compatible",
"generatedAt": "2026-08-13T12:00:00.000Z"
},
"report": {
"risks": [],
"score": 70,
"verdict": "revise",
"scopeCuts": [],
"strengths": [],
"coreThesis": "Validate demand before expanding the build.",
"assumptions": [],
"killCriteria": [],
"inputIntegrity": {
"status": "clean",
"evidence": []
},
"recommendation": "Revise around one measurable validation step.",
"validationPlan": [],
"requiredChanges": [
"Define the cheapest demand test."
],
"executiveSummary": "The proposal needs a smaller validation step.",
"economicsAssessment": {
"rating": "unclear",
"summary": "Measure real cost and demand.",
"keyQuestion": null
},
"optionalImprovements": [],
"feasibilityAssessment": {
"rating": "credible",
"summary": "A bounded test is feasible.",
"keyQuestion": null
},
"recommendedBuildSequence": [],
"differentiationAssessment": {
"rating": "unclear",
"summary": "Differentiation still needs evidence.",
"keyQuestion": null
}
},
"requestId": "example"
}
}
}Cite this page
The pinned URL below renders this page from the snapshot of 2026-09-15 16:57 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).
Plain text
TOLL, "proposal check on launchcheck-x402.fly.dev", snapshot of 2026-09-15 16:57 UTC. https://tollindex.com/e/launchcheck-x402-fly-dev-v1-proposal-check-f6752c/at/2026-09-15T16-57Z. Accessed [access date].
BibTeX
@misc{toll-e-launchcheck-x402-fly-dev-v1-proposal-check-f6752c-2026-09-15T16-57Z,
author = {TOLL},
title = {proposal check on launchcheck-x402.fly.dev},
howpublished = {\url{https://tollindex.com/e/launchcheck-x402-fly-dev-v1-proposal-check-f6752c/at/2026-09-15T16-57Z}},
year = {2026},
month = {9},
note = {Pinned view of the snapshot of 2026-09-15 16:57 UTC. Accessed [access date].}
}None yet. Anything submitted through the form below is published here with its outcome.