passlisted in Coinbase#1 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
- 4
- Unique payers, trailing 30 days
- 2
- Last called
- 2026-09-14 19:59 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 2 times 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.
combinatorics.openverbs.com serves catalan, a POST endpoint that TOLL places in compute, listed in the Coinbase registry.
Per call, catalan declares 0.004 USDC on Base.
catalan takes a json body with the field n.
No output metadata is declared; that is an advisory gap, not breakage.
catalan answered the sweep of 2026-09-15 with a valid 402, as at every sweep since 2026-09-11.
catalan is one of 5 listed endpoints on combinatorics.openverbs.com, 1st by calls among them.
catalan takes 25% of the calls counted across combinatorics.openverbs.com.
Over 30 days: 4 calls, 2 payers.
catalan was last called 1 day before the snapshot.
Closest in price to catalan within compute: md at url2md-testnet.url2md.workers.dev and md at url2md.io.
Among comparable prices in compute, catalan sits above 24% of them.
Across compute, 482 endpoints carry counters and catalan out-counts 73% of them.
370 listed endpoints across 89 hosts pay to the same wallet.
Seller tags: catalan number, compute catalan, balanced bracket count and binary tree count.
25 other listings in compute declare exactly the same price.
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 05:46 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 05:46 UTC | pass | 1 | daily-2026-09-15 |
| 2026-09-14 05:18 UTC | pass | 1 | daily-2026-09-14 |
| 2026-09-13 05:14 UTC | pass | 1 | daily-2026-09-13 |
| 2026-09-12 07:30 UTC | pass | 1 | daily-2026-09-12 |
| 2026-09-11 11:17 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 2026-09-14 19:59 UTC · method · live
The input and output block
{
"input": {
"body": {
"n": "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, "catalan on combinatorics.openverbs.com", snapshot of 2026-09-15 16:57 UTC. https://tollindex.com/e/combinatorics-openverbs-com-v1-catalan-89a773/at/2026-09-15T16-57Z. Accessed [access date].
BibTeX
@misc{toll-e-combinatorics-openverbs-com-v1-catalan-89a773-2026-09-15T16-57Z,
author = {TOLL},
title = {catalan on combinatorics.openverbs.com},
howpublished = {\url{https://tollindex.com/e/combinatorics-openverbs-com-v1-catalan-89a773/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.