nbx4 EVM Mechanism Evidence
nbx4 prepares block-pinned EVM mechanism evidence on 16 mainnets. Matched source hints and observed state changes; unknown is not safe. Reports cost 0.01 USDC via x402 on Base.
DataLiveeip155:8453Exactvia cdp
EvmSmart-contractOnchain-evidenceMultichainToken-mechanisms
Settlements · 30d
12↑ 100%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.16
Verified settled volume
12 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-25 14:47Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x15dBEC18A30457013c6a436FF25F607eF834c46CThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x15dB…4c46C. The signed payment is good for 5 minutes.
- Paid to
- 0x15dB…4c46C
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x15dBEC18A30457013c6a436FF25F607eF834c46C",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"report_id": "nbx4_v3_9846634448486c5bf601313396b111fdbae6fd3586d4ba088fd598f04bca7a09"
}
},
"output": {
"type": "json",
"example": {
"reportId": "nbx4_v3_9846634448486c5bf601313396b111fdbae6fd3586d4ba088fd598f04bca7a09",
"reportDigest": "9846634448486c5bf601313396b111fdbae6fd3586d4ba088fd598f04bca7a09"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"report_id"
],
"properties": {
"report_id": {
"type": "string",
"pattern": "^nbx4_v3_[0-9a-f]{64}$",
"description": "ID of an existing immutable v3 report returned by POST /v3/prepare; this is a public sample."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"reportId",
"reportDigest"
],
"properties": {
"address": {
"type": "string",
"pattern": "^0x[0-9a-f]{40}$"
},
"chainId": {
"type": "integer"
},
"finding": {
"type": "object",
"properties": {
"threat_analysis": {
"type": "object",
"properties": {
"severity": {
"enum": [
"REVIEW",
"INDETERMINATE"
],
"type": "string"
},
"mechanisms": {
"type": "object",
"properties": {
"mint": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"pause": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"fees_tax": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"upgrades": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"lp_removal": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"transfer_limits": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"liquidity_change": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"sell_restrictions": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
},
"blacklist_whitelist": {
"type": "object",
"properties": {
"status": {
"enum": [
"observed_signal",
"unknown"
],
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object"
}
}
},
"description": "Pinned evidence or an explicit unknown, not a safety verdict."
}
}
}
},
"description": "Nine mechanism dimensions with explicit unknowns. Source syntax and endpoint changes are not a honeypot or sellability verdict."
}
},
"description": "Paid-only observations. Older immutable reports may lack threat_analysis; a present source hint is not executable authority."
},
"reportId": {
"type": "string",
"pattern": "^nbx4_v3_[0-9a-f]{64}$"
},
"blockHash": {
"type": "string",
"pattern": "^0x[0-9a-f]{64}$"
},
"blockNumber": {
"type": "integer"
},
"reportDigest": {
"type": "string",
"pattern": "^[0-9a-f]{64}$"
},
"policyVersion": {
"type": "string"
}
},
"description": "Selected envelope fields only; the paid report also contains preliminary findings and explicit unknowns."
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-25 14:47Z
- Last indexed by Roundhouse
- 2026-10-26 22:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-24 22:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service nbx4 EVM Mechanism Evidence and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=nbx4%20EVM%20Mechanism%20Evidence' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://nbx4.dev/v3/report, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.