passlisted in Coinbase#1 by calls of 2 on this host
0.001 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
- 3
- Unique payers, trailing 30 days
- 3
- Last called
- 2026-10-11 08:17 UTC
- First observed by TOLLderived
- 2026-10-04
- Pricederived
- 0.001 USDC
- Networks
- 1
How has the volume on this endpoint moved?
brief check, a POST endpoint on keystone-opportunity-api.keystone-opportunity.workers.dev, appears in the Coinbase registry; TOLL's taxonomy puts it in inference.
brief check is priced at 0.001 USDC on Base.
The request to brief check is a json body with the field brief.
The declared response carries ready, score, checks and characters.
brief check answered the sweep of 2026-10-19 with a valid 402, as at every sweep since 2026-10-04.
brief check shares keystone-opportunity-api.keystone-opportunity.workers.dev with 1 other listed endpoint and is tied 1st by calls with 1 other.
brief check takes 50% of the calls counted across keystone-opportunity-api.keystone-opportunity.workers.dev.
The registry's counters give brief check 3 calls and 3 unique payers over 30 days, every call from a different payer.
The last call to brief check came 2 days before the snapshot, 2026-10-11.
Closest in price to brief check within inference: jev at jev-x402.vercel.app and summarize at automaton-paid2.sharkquant.ai.
No comparable listing in inference is cheaper.
brief check out-counts 84% of the 8,525 endpoints in inference that carry counters.
The wallet paid by brief check is the payee of 2 endpoints on one host.
The seller's tags on brief check are agents, brief, validation and qa.
Exactly this price appears on 310 other listings in inference.
the payment options, as of 2026-10-13 14:08 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 0.001 USDC | exact | 0xD3faD7…9ee723 |
the checks, as of 2026-10-19 10:02 UTC · method · pinnableendpoint answered HTTP 402
No named check failed.
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-10-19 10:02 UTC | pass | 0 | daily-2026-10-19 |
| 2026-10-18 12:31 UTC | pass | 0 | daily-2026-10-18 |
| 2026-10-16 07:58 UTC | pass | 0 | daily-2026-10-16 |
| 2026-10-15 09:52 UTC | pass | 0 | daily-2026-10-15 |
| 2026-10-14 07:46 UTC | pass | 0 | daily-2026-10-14 |
| 2026-10-13 12:36 UTC | pass | 0 | daily-2026-10-13 |
| 2026-10-12 09:59 UTC | pass | 0 | daily-2026-10-12 |
| 2026-10-11 08:37 UTC | pass | 0 | daily-2026-10-11 |
| 2026-10-10 16:48 UTC | pass | 0 | daily-2026-10-10 |
| 2026-10-09 09:48 UTC | pass | 0 | daily-2026-10-09 |
| 2026-10-08 11:14 UTC | pass | 0 | daily-2026-10-08 |
| 2026-10-07 10:38 UTC | pass | 0 | daily-2026-10-07 |
| 2026-10-06 11:19 UTC | pass | 0 | daily-2026-10-06 |
| 2026-10-05 10:06 UTC | pass | 0 | daily-2026-10-05 |
| 2026-10-04 22:01 UTC | pass | 0 | new-after-daily-2026-10-04 |
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 2026-10-11 08:17 UTC · method · live
The input and output block
{
"input": {
"body": {
"brief": "Deliverable: submit report.md within 24 hours. Acceptance: include three cited findings. Constraints: no confidential data."
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ready": false,
"score": 80,
"checks": [
{
"id": "deliverable",
"passed": true,
"message": "Name the exact file, artifact, or outcome to deliver."
}
],
"characters": 121
}
}
}Cite this page
The pinned URL below renders this page from the snapshot of 2026-10-13 14:08 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).
Plain text
TOLL, "brief check on keystone-opportunity-api.keystone-opportunity.workers.dev", snapshot of 2026-10-13 14:08 UTC. https://tollindex.com/e/keystone-opportunity-api-keystone-opportunity-workers-dev-v1-brief-check-9d375d/at/2026-10-13T14-08Z. Accessed [access date].
BibTeX
@misc{toll-e-keystone-opportunity-api-keystone-opportunity-workers-dev-v1-brief-check-9d375d-2026-10-13T14-08Z,
author = {TOLL},
title = {brief check on keystone-opportunity-api.keystone-opportunity.workers.dev},
howpublished = {\url{https://tollindex.com/e/keystone-opportunity-api-keystone-opportunity-workers-dev-v1-brief-check-9d375d/at/2026-10-13T14-08Z}},
year = {2026},
month = {10},
note = {Pinned view of the snapshot of 2026-10-13 14:08 UTC. Accessed [access date].}
}None yet. Anything submitted through the form below is published here with its outcome.