malformedlisted in Coinbase#3 by calls of 10 on this host
0.001 USDC
per call, as the listing declares it on eip155:
- Validation state
- malformed
- Uptime, 7 / 30 / 90 days
- 0% / 0% / 0%
- Calls, trailing 30 days
- 1
- Unique payers, trailing 30 days
- 1
- Last called
- 2026-08-23 09:07 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 0.001 USDC
- Networks
- 1
How big is this endpoint among the ones like it?
No trace is drawn of this endpoint’s own volume. Its counters have changed 1 time across 29 observations, and 3 changes are the fewest this site will draw a trace through, because two points and a guess are not a series. Every observation is in the JSON.
The sweep of 2026-09-15 got a payment challenge that did not pass the required check has_bazaar_extension.
For headers the failing check asks whether the body carries the Bazaar discovery extension.
kairostamp.com serves headers, a GET endpoint that TOLL places in market data, listed in the Coinbase registry.
A call to headers costs 0.001 USDC on Base, as declared.
The listing describes the request as the query parameter url.
headers returns json; the example shows http, note and receipt_id.
In the trailing 30 days: one call, one payer.
headers was last called 24 days before the snapshot.
Of kairostamp.com's 10 listings, headers ranks tied 3rd by calls with 7 others.
headers takes 5% of the calls counted across kairostamp.com.
No comparable listing in market data is cheaper.
Closest in price to headers within market data: chain block number at api.onesource.io and recipient api offers at api.loyalspark.online.
The wallet paid by headers is the payee of 10 endpoints on one host.
The price of headers is declared by 534 other listings in market data too.
the payment options, as of 2026-09-15 21:20 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 0.001 USDC | exact | 0xdB6F69…808453 |
the checks, as of 2026-09-15 04:53 UTC · method · pinnableendpoint answered HTTP 402
has_bazaar_extension· the body carries the Bazaar discovery extension
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-09-15 04:53 UTC | malformed | 1 | daily-2026-09-15 |
| 2026-09-14 04:48 UTC | malformed | 1 | daily-2026-09-14 |
| 2026-09-13 04:46 UTC | malformed | 1 | daily-2026-09-13 |
| 2026-09-12 07:03 UTC | malformed | 1 | daily-2026-09-12 |
| 2026-09-11 10:40 UTC | malformed | 1 | 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 2026-08-23 09:07 UTC · method · live
The input and output block
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"url": "https://example.com/"
}
},
"output": {
"type": "json",
"example": {
"http": {
"url": "https://example.com/",
"fetched_at": "2026-08-23T05:32:12.771Z",
"byte_length": 559,
"status_code": 200,
"content_type": "text/html",
"redirect_chain": []
},
"note": "Transport metadata only: no response body, body digest or content preview is returned. TLS certificate details are not collected by this service.",
"receipt_id": "85cd424c-b68b-440e-8f4f-e02147799f30"
}
}
}Cite this page
The pinned URL below renders this page from the snapshot of 2026-09-15 21:20 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).
Plain text
TOLL, "headers on kairostamp.com", snapshot of 2026-09-15 21:20 UTC. https://tollindex.com/e/kairostamp-com-api-v1-headers-5ea84f/at/2026-09-15T21-20Z. Accessed [access date].
BibTeX
@misc{toll-e-kairostamp-com-api-v1-headers-5ea84f-2026-09-15T21-20Z,
author = {TOLL},
title = {headers on kairostamp.com},
howpublished = {\url{https://tollindex.com/e/kairostamp-com-api-v1-headers-5ea84f/at/2026-09-15T21-20Z}},
year = {2026},
month = {9},
note = {Pinned view of the snapshot of 2026-09-15 21:20 UTC. Accessed [access date].}
}None yet. Anything submitted through the form below is published here with its outcome.