passlisted in Coinbase#25 by calls of 361 on this host
0.002 USDC
per call, as the listing declares it on eip155:
- Validation state
- pass
- Uptime, 7 / 30 / 90 days
- 75% / 75% / 75%
- Calls, trailing 30 days
- 1
- Unique payers, trailing 30 days
- 1
- Last called
- 2026-09-25 01:15 UTC
- First observed by TOLLderived
- 2026-09-25
- Pricederived
- 0.002 USDC
- Networks
- 3
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 22 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.
Among the 361 endpoints on twin.unykorn.org, research doi is tied 25th by calls with 336 others.
research doi takes a json body with the field params.
A response from research doi, as declared, includes ok, type, receipt, sources, limitations, generated_at and 1 other.
research doi drew a single call from a single payer in the trailing 30 days.
The last call to research doi came 6 days before the snapshot, 2026-09-25.
Each call is priced at 0.002 USDC, payable on Base.
For research doi the listing declares 3 accepts on Base, Polygon and Solana, to 2 different wallets.
research doi is a POST endpoint at twin.unykorn.org, listed in the Coinbase registry and filed by TOLL under search.
research doi answered the sweep of 2026-10-01 with a valid 402, passing 3 of 4 sweeps since 2026-09-25.
Closest in price to research doi within search: search at app.metalift.ai and social links search search social links at x402.openwebninja.com.
research doi is priced above 11% of comparable listings in search.
For 1 of the options on research doi, TOLL has no verified decimals and shows the raw amount.
The wallet paid by research doi is the payee of 362 endpoints on one host.
The seller's tags on research doi are citation, doi, academic and bibliography.
The price of research doi is declared by 148 other listings in search too.
the payment options, as of 2026-10-01 13:10 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 0.002 USDC | exact | 0x7d9a65…c156DB |
| Coinbase | eip155: | USDC | 0.002 USDC | exact | 0x7d9a65…c156DB |
| Coinbase | solana: | EPjFWdd5…yTDt1v | 2000 smallest units, decimals unknown | exact | FN9TC2Sc…jXLwY1 |
the checks, as of 2026-10-01 09:52 UTC · method · pinnableendpoint answered HTTP 402
No named check failed.
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-10-01 09:52 UTC | pass | 0 | daily-2026-10-01 |
| 2026-09-30 09:19 UTC | pass | 0 | daily-2026-09-30 |
| 2026-09-29 21:24 UTC | pass | 0 | daily-2026-09-29 |
| 2026-09-25 19:28 UTC | fail | 1 | new-after-daily-2026-09-24 |
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 2026-09-25 01:15 UTC · method · live
The input and output block
{
"input": {
"body": {
"params": {
"doi": "10.1038/nature12373"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"type": "crossref-doi",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.002,
"receipt_id": "g402-<16hex>"
},
"sources": [
{
"ok": true,
"name": "<source>"
}
],
"limitations": "<text>",
"generated_at": "<iso time>",
"evidence_hash": "sha256:<64hex>"
}
}
}Cite this page
The pinned URL below renders this page from the snapshot of 2026-10-01 13:10 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).
Plain text
TOLL, "research doi on twin.unykorn.org", snapshot of 2026-10-01 13:10 UTC. https://tollindex.com/e/twin-unykorn-org-research-doi-eaa74b/at/2026-10-01T13-10Z. Accessed [access date].
BibTeX
@misc{toll-e-twin-unykorn-org-research-doi-eaa74b-2026-10-01T13-10Z,
author = {TOLL},
title = {research doi on twin.unykorn.org},
howpublished = {\url{https://tollindex.com/e/twin-unykorn-org-research-doi-eaa74b/at/2026-10-01T13-10Z}},
year = {2026},
month = {10},
note = {Pinned view of the snapshot of 2026-10-01 13:10 UTC. Accessed [access date].}
}None yet. Anything submitted through the form below is published here with its outcome.