passlisted in Coinbase#2 by calls of 3 on this host
0.08 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
- 2026-09-12 23:41 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 0.08 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.
At x402.hydratrader.ai, research brief takes POST requests, is listed in the Coinbase registry, and falls under inference by TOLL's rules.
On Base, research brief asks 0.08 USDC per call.
Callers of research brief supply a json body with the fields depth, scope and question.
A response from research brief, as declared, includes ok, brief, usage, endpoint, citations and client_ref.
research brief answered the sweep of 2026-09-15 with a valid 402, as at every sweep since 2026-09-11.
research brief shares x402.hydratrader.ai with 2 other listed endpoints and is tied 2nd by calls with 1 other.
research brief takes 30% of the calls counted across x402.hydratrader.ai.
One payer accounts for all 3 calls to research brief over 30 days.
research brief was last called 3 days before the snapshot.
Closest in price to research brief within inference: openai gpt 4o at netintel.dev and agent evidence at agents.dubbleblack.com.
research brief is priced above 77% of comparable listings in inference.
Within inference, 75% of endpoints with counters have fewer calls.
The wallet paid by research brief is the payee of 3 endpoints on one host.
The price of research brief is declared by 79 other listings in inference too.
the payment options, as of 2026-09-15 16:57 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | eip155: | USDC | 0.08 USDC | exact | 0x55d06e…1616fc |
the checks, as of 2026-09-15 06:47 UTC · method · pinnableendpoint answered HTTP 402
No named check failed.
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-09-15 06:47 UTC | pass | 0 | daily-2026-09-15 |
| 2026-09-14 06:15 UTC | pass | 0 | daily-2026-09-14 |
| 2026-09-13 06:06 UTC | pass | 0 | daily-2026-09-13 |
| 2026-09-12 08:23 UTC | pass | 0 | daily-2026-09-12 |
| 2026-09-11 13:59 UTC | pass | 0 | 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 2026-09-12 23:41 UTC · method · live
The input and output block
{
"input": {
"body": {
"depth": "quick",
"scope": {
"max_sources": 3
},
"question": "What is the x402 protocol and how do agents pay for APIs?"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"brief": {
"caveats": [
"Ecosystem evolving quickly; always check live facilitator docs"
],
"summary": "x402 is an open payment protocol that uses HTTP 402 Payment Required so clients (including AI agents) can pay for web resources with stablecoins, commonly USDC on Base, via a facilitator that verifies and settles.",
"headline": "x402 turns HTTP 402 into USDC micropayments for agents",
"confidence": 0.78,
"key_points": [
"Server returns 402 with payment terms; client pays and retries",
"CDP Facilitator commonly used for verify/settle on Base",
"Bazaar indexes discoverable paid routes"
]
},
"usage": {
"floor_mult": 1.3,
"latency_ms": 6400,
"price_usdc": "0.08",
"sources_used": 3,
"token_cost_est_usdc": "0.05"
},
"endpoint": "research-brief",
"citations": [
{
"url": "https://docs.cdp.coinbase.com/x402/buyer/discover-services",
"title": "x402 Bazaar (Discovery Layer)",
"snippet": "The x402 Bazaar is a catalog of payment-gated services discovered by the CDP Facilitator.",
"published": null,
"publisher": "Coinbase CDP"
}
],
"client_ref": 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, "research brief on x402.hydratrader.ai", snapshot of 2026-09-15 16:57 UTC. https://tollindex.com/e/x402-hydratrader-ai-v1-research-brief-e0a6d6/at/2026-09-15T16-57Z. Accessed [access date].
BibTeX
@misc{toll-e-x402-hydratrader-ai-v1-research-brief-e0a6d6-2026-09-15T16-57Z,
author = {TOLL},
title = {research brief on x402.hydratrader.ai},
howpublished = {\url{https://tollindex.com/e/x402-hydratrader-ai-v1-research-brief-e0a6d6/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.