passlisted in Coinbase#55 by calls of 147 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
- 2
- Unique payers, trailing 30 days
- 2
- Last called
- 2026-10-08 06:09 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 0.001 USDC
- Networks
- 2
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 89 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.
isbn check is one of 147 listed endpoints on api.delx.ai, tied 55th by calls with 85 others among them.
isbn check declares an input block that names no parameters.
It declares json output but gives no example.
The registry's counters give isbn check 2 calls and 2 unique payers over 30 days, every call from a different payer.
isbn check was last called 5 days before the snapshot.
Each call is priced at 0.001 USDC, payable on Base.
For isbn check the listing declares 3 accepts on Base and Solana, to 2 different wallets.
api.delx.ai serves isbn check, a POST endpoint that TOLL places in identity, listed in the Coinbase registry.
isbn check answered the sweep of 2026-10-30 with a valid 402, as at every sweep since 2026-09-11.
Closest in price to isbn check within identity: human at human.twin3.ai and meta intelligence at x402.ottoai.services.
isbn check is the cheapest of 2,153 comparable listings in identity; none asks less.
The wallet paid by isbn check is the payee of 310 endpoints on one host.
Seller tags: x402, utility, isbn and checksum; seller label: "utility".
isbn check dropped out of the registry at the pull of 2026-09-27 and was listed again on 2026-10-08.
The price of isbn check is declared by 154 other listings in identity too.
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 | 0x9f8bd9…5e73A2 |
| Coinbase | eip155: | USDC | 0.001 USDC | exact | 0x9f8bd9…5e73A2 |
| Coinbase | solana: | USDC | 0.001 USDC | exact | 28heAMpF…YYsemG |
the checks, as of 2026-10-30 06:07 UTC · method · pinnableendpoint answered HTTP 402
No named check failed.
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-10-30 06:07 UTC | pass | 0 | daily-2026-10-30 |
| 2026-10-29 05:49 UTC | pass | 0 | daily-2026-10-29 |
| 2026-10-28 06:13 UTC | pass | 0 | daily-2026-10-28 |
| 2026-10-27 06:07 UTC | pass | 0 | daily-2026-10-27 |
| 2026-10-26 11:28 UTC | pass | 0 | daily-2026-10-26 |
| 2026-10-24 20:50 UTC | pass | 0 | daily-2026-10-24 |
| 2026-10-23 05:58 UTC | pass | 0 | daily-2026-10-23 |
| 2026-10-22 04:13 UTC | pass | 0 | daily-2026-10-22 |
| 2026-10-21 07:37 UTC | pass | 0 | daily-2026-10-21 |
| 2026-10-20 07:31 UTC | pass | 0 | daily-2026-10-20 |
| 2026-10-19 05:41 UTC | pass | 0 | daily-2026-10-19 |
| 2026-10-18 07:56 UTC | pass | 0 | daily-2026-10-18 |
| 2026-10-17 17:56 UTC | pass | 0 | daily-2026-10-17 |
| 2026-10-16 04:11 UTC | pass | 0 | daily-2026-10-16 |
| 2026-10-15 05:44 UTC | pass | 0 | daily-2026-10-15 |
| 2026-10-14 04:10 UTC | pass | 0 | daily-2026-10-14 |
| 2026-10-13 08:34 UTC | pass | 0 | daily-2026-10-13 |
| 2026-10-12 05:55 UTC | pass | 0 | daily-2026-10-12 |
| 2026-10-11 04:18 UTC | pass | 0 | daily-2026-10-11 |
| 2026-10-10 09:31 UTC | pass | 0 | daily-2026-10-10 |
| 2026-10-09 04:18 UTC | pass | 0 | daily-2026-10-09 |
| 2026-10-08 06:07 UTC | pass | 0 | daily-2026-10-08 |
| 2026-09-25 19:43 UTC | pass | 0 | daily-2026-09-25 |
| 2026-09-23 05:25 UTC | pass | 0 | daily-2026-09-23 |
| 2026-09-22 05:34 UTC | pass | 0 | daily-2026-09-22 |
| 2026-09-21 05:58 UTC | pass | 0 | daily-2026-09-21 |
| 2026-09-20 18:37 UTC | pass | 0 | daily-2026-09-20 |
| 2026-09-19 03:59 UTC | pass | 0 | daily-2026-09-19 |
| 2026-09-18 08:52 UTC | pass | 0 | daily-2026-09-18 |
| 2026-09-17 03:59 UTC | pass | 0 | daily-2026-09-17 |
| 2026-09-16 03:59 UTC | pass | 0 | daily-2026-09-16 |
| 2026-09-15 03:58 UTC | pass | 0 | daily-2026-09-15 |
| 2026-09-14 03:57 UTC | pass | 0 | daily-2026-09-14 |
| 2026-09-13 03:57 UTC | pass | 0 | daily-2026-09-13 |
| 2026-09-12 06:12 UTC | pass | 0 | daily-2026-09-12 |
| 2026-09-11 09:36 UTC | pass | 0 | daily-2026-09-11 |
Presence in a registry, not liveness of the service (method). Newest first.
- back in Coinbase
- absence from Coinbase confirmed, rule v1
- absent from Coinbase at this pull
- listed in Coinbase
From the registry record, not validated by TOLL.the declared schema, as of 2026-10-08 06:09 UTC · method · live
The input and output block
{
"input": {
"body": {},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {}
}
}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, "isbn check on api.delx.ai", snapshot of 2026-10-13 14:08 UTC. https://tollindex.com/e/api-delx-ai-api-v1-x402-isbn-check-0f579e/at/2026-10-13T14-08Z. Accessed [access date].
BibTeX
@misc{toll-e-api-delx-ai-api-v1-x402-isbn-check-0f579e-2026-10-13T14-08Z,
author = {TOLL},
title = {isbn check on api.delx.ai},
howpublished = {\url{https://tollindex.com/e/api-delx-ai-api-v1-x402-isbn-check-0f579e/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.