payment-ready until 2026-08-20
Deterministic npm registry evidence for coding agents: dependency maps, integrity, provenance, factual metadata flags, and stable digests over x402.
Pay from $0.003 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.
first settlement 2026-07-23 · $0.03 all-time · settled via payAI
ASSESSMENT
updated 2h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 99.9%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 99.9%
- uptime 90d
- 99.9%
- response p95
- 1380ms
- avg response
- 787ms
- total checks
- 1,458
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (14/14)
14 of 14 x402 conformance checks pass. Full checklist below.
price $0.003 (p28 in Data)
- price (min)
- $0.003
- category percentile (min)
- p28 in Data
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- 24d
- registrar
- Cloudflare, Inc.
- hosting
- custom
- domain created
- 2026-07-18
Identity facts, not a risk score.
traction $0.025 30d · 3 buyers
- volume 30d
- $0.025
- buyers 30d
- 3
- settlements 30d
- 4
- first settlement
- 2026-07-23
- last settlement
- 2026-07-26
- top buyer share
- 47% of 30d volume
- trend 7d vs 30d
- 0.00x the 30d daily rate
- networks
- eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
- volume all-time
- $0.03
- settlements all-time
- 5
- median settlement 30d
- $0.02
- max settlement 30d
- $0.03
- settled via
- payAI ($0.07, 4 tx)
Attributed pro-quota: this payout address is shared, so volume is the operator-level figure divided by the services sharing it, while buyer and transaction counts stay whole. A declared convention, not an individually observed measure, and still a conservative undercount.
Currently sharing this payout address with Melchior Video Context, Recompete Radar.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedProvides npm package evidence including registry facts, distribution integrity, provenance, and factual flags.
- category
- package-evidence
- in
- body
- auth
- api key
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| POST | /v1/npm/evidence | $0.003 | Base/Solana | USDC | header |
REQUEST / RESPONSE EXAMPLE
An unpaid request to POST /v1/npm/evidence returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i -X POST 'https://packages.melchiorlabs.com/v1/npm/evidence'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x174fA5CC0E9C170FC8f361a15fcce3d9271Df880",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 30
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"
},
"payTo": "9DqUuG8FVAPKWMNSLHQUfod1FhWZ47igMNz6muKrZDfu",
"amount": "3000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 30
}
],
"resource": {
"url": "https://packages.melchiorlabs.com/v1/npm/evidence",
"tags": [
"npm",
"packages",
"dependencies",
"provenance",
"coding-agents"
],
"iconUrl": "https://packages.melchiorlabs.com/icon.svg",
"mimeType": "application/json",
"description": "Deterministic npm package evidence: registry facts, distribution integrity, provenance, and factual flags for coding agents.",
"serviceName": "Package Evidence"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"package": "@x402/core",
"version": "latest"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"flags": [
"provenance_attestation_missing"
],
"digests": {
"input": "…",
"result": "…"
},
"license": "MIT",
"requestId": "89416332-bc4e-43da-b0e2-32af08677d9e",
"limitations": [
"This report states public npm registry facts only; it does not certify that the package is safe, trustworthy, maintained, or free of vulnerabilities."
],
"distribution": {
"integrity": "sha512-…",
"attestationUrl": null,
"signatureCount": 1
},
"repositoryUrl": "git+https://github.com/example/example.git",
"resolvedVersion": "2.19.0"
}
}
},
"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": {
"required": [
"package"
],
"properties": {
"package": {
"type": "string",
"maxLength": 214,
"description": "Public npm package name, scoped or unscoped, lowercase."
},
"version": {
"type": "string",
"default": "latest",
"maxLength": 64,
"description": "Exact semver or dist-tag."
},
"nodeVersion": {
"type": "string",
"maxLength": 64,
"description": "Exact stable semver; enables the node_engine_mismatch flag."
}
}
},
"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"
}
}
}
}
}
}
},
"x402Version": 2
}
] OVER TIME
All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/package-evidence/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.
Shared payout address (2 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service figure is attributed, the assessment block and the ranking, it is the address total divided pro-quota by the 3 services sharing it: a declared convention, not an individually observed measure.
Shared payout address (2 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Per-service buyer and transaction counts are shown whole (integers), not divided; only volume is attributed pro-quota. A declared convention, not an individually observed measure.
COMPLIANCE
14/14 checks pass · grade Alast 402 captured 2026-07-28 · last up 2026-08-13
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) live · click to expand
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