Dependency Preflight
Evaluate up to 10 exact npm or PyPI package versions in one $0.02 paid batch immediately before installation or an exact-version change. Returns deterministic allow, review, or block guidance with known-vulnerability, lifecycle, declared-license, release-age, and npm install-lifecycle evidence. Reuse a current result for unchanged inputs instead of purchasing a duplicate check for an installation retry.
SearchLiveeip155:8453Exactvia cdp
Dependency-preflightPackage-installNpmPypiSoftware-supply-chain
Calls · 30d
2↓ 63%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.11
Verified settled volume
22 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
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 2026-08-31 06:17Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9acdadcec881a63508c0f2CD3A4ae61149cc2500The 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.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x9acd…c2500. The signed payment is good for 5 minutes.
- Paid to
- 0x9acd…c2500
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x9acdadcec881a63508c0f2CD3A4ae61149cc2500",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"policy": "balanced",
"packages": [
{
"name": "lodash",
"version": "4.17.21"
}
],
"ecosystem": "npm"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"policy": {
"name": "balanced",
"version": "2026-08-19.2"
},
"summary": {
"allow": 0,
"block": 0,
"review": 1,
"partial": 0,
"package_count": 1
},
"decision": "review",
"packages": [
{
"name": "lodash",
"install": {
"lifecycle_scripts": []
},
"license": {
"status": "allow",
"declared": "MIT",
"normalized": "MIT"
},
"partial": false,
"decision": "review",
"evidence": [
{
"url": "https://registry.npmjs.org/lodash",
"cached": false,
"source": "npm",
"retrieved_at": "2026-08-20T00:00:00.000Z"
},
{
"url": "https://api.osv.dev/v1/query",
"cached": false,
"source": "osv",
"retrieved_at": "2026-08-20T00:00:00.000Z"
}
],
"findings": [
{
"code": "KNOWN_VULNERABILITY",
"level": "review",
"message": "A known high-severity vulnerability affects the requested version; review a fixed version."
}
],
"ecosystem": "npm",
"lifecycle": {
"yanked": false,
"deprecated": false,
"latest_version": "4.18.1",
"latest_release_date": "2026-04-01T21:01:20.458Z",
"requested_release_date": "2021-02-20T15:42:16.891Z"
},
"version_exists": true,
"vulnerabilities": [
{
"id": "GHSA-r5fr-rjxr-66jc",
"url": "https://osv.dev/vulnerability/GHSA-r5fr-rjxr-66jc",
"aliases": [
"CVE-2021-23337"
],
"summary": "Known code-injection vulnerability in the requested lodash version.",
"severity": "high",
"modified_at": "2026-07-08T08:11:11.759560102Z",
"fixed_versions": [
"4.18.0"
],
"upstream_severity": "HIGH"
}
],
"requested_version": "4.17.21"
}
],
"workflow": {
"rerun_when": [
"package_added",
"exact_version_changed",
"policy_input_changed",
"fresh_evidence_required"
],
"instruction": "Run Dependency Preflight before installing every new dependency and whenever an exact version or policy input changes.",
"decision_actions": {
"allow": "Continue only if the result and its evidence meet the caller's requirements.",
"block": "Do not install the requested exact version.",
"review": "Pause installation and review the findings and evidence."
},
"recommended_trigger": "before_dependency_install",
"avoid_duplicate_payment": "Reuse an acceptable current result when the ecosystem, package name, exact version, and policy inputs are unchanged."
},
"request_id": "req_example",
"limitations": [
"ALLOW means configured checks completed without a configured finding; it is not a claim that a package is safe.",
"Known-vulnerability, registry metadata, release-age, declared-license, and npm install-lifecycle preflight only.",
"PyPI source-build or install-time code execution is not currently analyzed.",
"Not a security guarantee or legal opinion."
],
"generated_at": "2026-01-01T00:00:00.000Z"
}
}
},
"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",
"packages"
],
"properties": {
"policy": {
"enum": [
"balanced"
],
"type": "string",
"default": "balanced",
"description": "Optional; balanced is the only version-one policy."
},
"packages": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"version"
],
"properties": {
"name": {
"type": "string",
"maxLength": 214,
"minLength": 1,
"description": "Registry package name."
},
"version": {
"type": "string",
"maxLength": 128,
"minLength": 1,
"description": "Exact version only; ranges and tags are rejected. npm may include an optional leading v."
}
},
"additionalProperties": false
},
"maxItems": 10,
"minItems": 1,
"description": "Exact package names and versions to evaluate as one paid batch."
},
"ecosystem": {
"enum": [
"npm",
"pypi"
],
"type": "string",
"description": "One package ecosystem per request."
},
"license_denylist": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 50,
"description": "Optional individual SPDX-style license identifiers to block.",
"uniqueItems": true
},
"license_allowlist": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 50,
"description": "Optional individual SPDX-style license identifiers to allow.",
"uniqueItems": true
}
},
"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": [
"request_id",
"decision",
"policy",
"summary",
"packages",
"workflow",
"limitations",
"generated_at"
],
"properties": {
"policy": {
"type": "object"
},
"summary": {
"type": "object"
},
"decision": {
"enum": [
"allow",
"review",
"block"
],
"type": "string"
},
"packages": {
"type": "array",
"items": {
"type": "object"
},
"maxItems": 10,
"minItems": 1
},
"workflow": {
"type": "object",
"required": [
"recommended_trigger",
"instruction",
"decision_actions",
"rerun_when",
"avoid_duplicate_payment"
],
"properties": {
"rerun_when": {
"type": "array",
"items": {
"enum": [
"package_added",
"exact_version_changed",
"policy_input_changed",
"fresh_evidence_required"
],
"type": "string"
},
"uniqueItems": true
},
"instruction": {
"type": "string"
},
"decision_actions": {
"type": "object",
"required": [
"allow",
"review",
"block"
],
"properties": {
"allow": {
"type": "string"
},
"block": {
"type": "string"
},
"review": {
"type": "string"
}
},
"additionalProperties": false
},
"recommended_trigger": {
"const": "before_dependency_install"
},
"avoid_duplicate_payment": {
"type": "string"
}
},
"additionalProperties": false
},
"request_id": {
"type": "string"
},
"limitations": {
"type": "array",
"items": {
"type": "string"
}
},
"generated_at": {
"type": "string",
"description": "ISO 8601 generation timestamp."
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-31 06:17Z
- Last indexed by Roundhouse
- 2026-09-26 16:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 23:45Z
- x402 version
- 2
- Max timeout
- 300s
- 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 Dependency Preflight 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=Dependency%20Preflight' 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://api.preflightstack.com/v1/dependency-preflight, 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.