passlisted in Coinbasecounted above 77% of Other
0.01 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
- 2026-09-14 19:48 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 0.01 USDC
- Networks
- 2
How has the volume on this endpoint moved?
check answers POST requests at http-header-checker.underscoredone.com; it is listed in the Coinbase registry and TOLL files it under the "other" category.
On Base, check asks 0.01 USDC per call.
Requests carry a json body with the fields url, method and follow_redirects.
check accepts payment on Base and Solana, 2 options in all, to 2 different wallets.
A response from check, as declared, includes url, headers, final_url, api_version, status_code, redirect_chain and 2 others.
check answered the sweep of 2026-09-15 with a valid 402, as at every sweep since 2026-09-11.
http-header-checker.underscoredone.com lists no other endpoint.
check drew 3 calls from 3 unique payers in the trailing 30 days, every call from a different payer.
check was last called 1 day before the snapshot.
Closest in price to check within the "other" category: merchants at www.x402scan.com and wallets transactions at api.zerion.io.
check is priced above 64% of comparable listings in the "other" category.
check out-counts 77% of the 2,777 endpoints in the "other" category that carry counters.
The wallet paid by check is the payee of 28 endpoints across 28 hosts.
Seller tags: http headers, response headers, headers and inspect http headers.
The price of check is declared by 428 other listings in the "other" category too.
the payment options, as of 2026-09-15 16:57 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 0.01 USDC | exact | 0xE97408…2C2F08 |
| Coinbase | solana: | USDC | 0.01 USDC | exact | 8ugAWAXD…vzQT3b |
the checks, as of 2026-09-15 06:15 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 06:15 UTC | pass | 0 | daily-2026-09-15 |
| 2026-09-14 05:45 UTC | pass | 0 | daily-2026-09-14 |
| 2026-09-13 05:39 UTC | pass | 0 | daily-2026-09-13 |
| 2026-09-12 07:56 UTC | pass | 0 | daily-2026-09-12 |
| 2026-09-11 11:50 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 2026-09-14 19:48 UTC · method · live
The input and output block
{
"input": {
"body": {
"url": "https://example.com",
"method": "GET",
"follow_redirects": true
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"url": "https://example.com",
"headers": {
"server": "nginx",
"content-type": "text/html; charset=UTF-8",
"cache-control": "max-age=600",
"content-length": "1256"
},
"final_url": "https://example.com/",
"api_version": "1.0.0",
"status_code": 200,
"redirect_chain": [
{
"url": "http://example.com",
"status_code": 301
}
],
"response_time_ms": 214,
"missing_security_headers": [
"strict-transport-security",
"content-security-policy"
]
}
}
}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, "check on http-header-checker.underscoredone.com", snapshot of 2026-09-15 16:57 UTC. https://tollindex.com/e/http-header-checker-underscoredone-com-check-b27553/at/2026-09-15T16-57Z. Accessed [access date].
BibTeX
@misc{toll-e-http-header-checker-underscoredone-com-check-b27553-2026-09-15T16-57Z,
author = {TOLL},
title = {check on http-header-checker.underscoredone.com},
howpublished = {\url{https://tollindex.com/e/http-header-checker-underscoredone-com-check-b27553/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.