pkgproof
One pkgproof package verification
OtherLiveeip155:8453Exactvia cdp
NpmSecuritySupply-chainPackage-verificationTyposquat
Calls · 30d
8↓ 35%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$1.20
Verified settled volume
24 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
8
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-09-08 11:01Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xB1fe0fd90C16800C3D5e811c6f07972dE9d2b98EThe 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required. Sign the payment requirements in `accepts` and resend with an X-PAYMENT header.",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB1fe0fd90C16800C3D5e811c6f07972dE9d2b98E",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://x402.pkgproof.net/v1/verify",
"description": "One pkgproof package verification",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"discoverable": true
}
},
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0xB1fe…2b98E. The signed payment is good for 1 minute.
- Paid to
- 0xB1fe…2b98E
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 50000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB1fe0fd90C16800C3D5e811c6f07972dE9d2b98E",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"name": "left-pad",
"version": "1.3.0",
"ecosystem": "npm"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"name": "left-pad",
"reasons": [
{
"code": "package_exists",
"kind": "fact",
"detail": "left-pad 1.3.0 is published on the npm registry.",
"source": "npm registry",
"verdict": "safe"
},
{
"code": "no_known_advisories",
"kind": "fact",
"detail": "OSV lists no advisories for this version.",
"source": "osv.dev",
"verdict": "safe"
}
],
"sources": {
"osv.dev": "https://api.osv.dev",
"npm registry": "https://registry.npmjs.org"
},
"verdict": "safe",
"version": "1.3.0",
"ecosystem": "npm",
"checked_at": "2026-08-26T12:00:00Z"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"ecosystem",
"name"
],
"properties": {
"name": {
"type": "string",
"description": "Package name. ASCII only; homoglyph and Unicode-confusable names are refused before any upstream call."
},
"version": {
"type": "string",
"description": "Optional. Omit to verify the package rather than one release."
},
"ecosystem": {
"enum": [
"npm"
],
"type": "string",
"description": "npm is the only ecosystem this service verifies."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"ecosystem",
"name",
"verdict",
"reasons",
"sources",
"checked_at"
],
"properties": {
"name": {
"type": "string"
},
"reasons": {
"type": "array",
"items": {
"type": "object",
"required": [
"verdict",
"code",
"kind",
"source",
"detail"
],
"properties": {
"code": {
"type": "string"
},
"data": {
"type": "object"
},
"kind": {
"enum": [
"fact",
"heuristic"
],
"type": "string",
"description": "fact is established; heuristic is inference and never convicts on its own."
},
"detail": {
"type": "string"
},
"source": {
"type": "string"
},
"verdict": {
"type": "string"
}
}
},
"description": "Evidence, one entry per finding. Branch on `code`, not on `detail`."
},
"sources": {
"type": "object",
"description": "The upstream each check consulted, by name."
},
"verdict": {
"enum": [
"safe",
"caution",
"block",
"does_not_exist"
],
"type": "string",
"description": "Ordered worst-last. The overall verdict is the worst any check produced. block and does_not_exist are answers, not errors, and return 200."
},
"version": {
"type": [
"string",
"null"
]
},
"ecosystem": {
"type": "string"
},
"checked_at": {
"type": "string",
"format": "date-time",
"description": "When the verification ran, which is not always when it was requested: a reused result carries its original timestamp."
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-26 11:39Z
- Last indexed by Roundhouse
- 2026-09-24 18:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 19:15Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 405
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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service pkgproof 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=pkgproof' 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://x402.pkgproof.net/v1/verify, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.