passlisted in Coinbase#2 by calls of 5 on this host
0.004 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
- 1
- Last called
- 2026-09-06 08:14 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 0.004 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 28 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.
combinations, a POST endpoint on combinatorics.openverbs.com, appears in the Coinbase registry; TOLL's taxonomy puts it in compute.
On Base, combinations asks 0.004 USDC per call.
combinations takes a json body with the fields n and r.
combinations declares nothing about its output; validate flags that as advisory, not a verdict.
combinations answered the sweep of 2026-09-15 with a valid 402, as at every sweep since 2026-09-11.
combinations shares combinatorics.openverbs.com with 4 other listed endpoints and is tied 2nd by calls with 3 others.
combinations takes 19% of the calls counted across combinatorics.openverbs.com.
One payer accounts for all 3 calls to combinations over 30 days.
The last call to combinations came 9 days before the snapshot, 2026-09-06.
Closest in price to combinations within compute: md at url2md.io and md at md.fastdb.in.
combinations is priced above 24% of comparable listings in compute.
Within compute, 61% of endpoints with counters have fewer calls.
The wallet paid by combinations is the payee of 370 endpoints across 89 hosts.
The seller's own tags are combinations ncr, compute combinations, binomial coefficient and ncr api.
The price of combinations is declared by 25 other listings in compute too.
the payment options, as of 2026-09-15 16:57 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 0.004 USDC | exact | 0xb3f4de…C2194A |
the checks, as of 2026-09-15 06:37 UTC · method · pinnableendpoint answered HTTP 402
bazaar.info.output· advisory, does not affect the verdict · output metadata is present (advisory)
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-09-15 06:37 UTC | pass | 1 | daily-2026-09-15 |
| 2026-09-14 06:06 UTC | pass | 1 | daily-2026-09-14 |
| 2026-09-13 05:58 UTC | pass | 1 | daily-2026-09-13 |
| 2026-09-12 08:15 UTC | pass | 1 | daily-2026-09-12 |
| 2026-09-11 12:47 UTC | pass | 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 2026-09-06 08:14 UTC · method · live
The input and output block
{
"input": {
"body": {
"n": "42",
"r": "42"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": null
}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, "combinations on combinatorics.openverbs.com", snapshot of 2026-09-15 16:57 UTC. https://tollindex.com/e/combinatorics-openverbs-com-v1-combinations-d24c89/at/2026-09-15T16-57Z. Accessed [access date].
BibTeX
@misc{toll-e-combinatorics-openverbs-com-v1-combinations-d24c89-2026-09-15T16-57Z,
author = {TOLL},
title = {combinations on combinatorics.openverbs.com},
howpublished = {\url{https://tollindex.com/e/combinatorics-openverbs-com-v1-combinations-d24c89/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.