Artifact Inspector
JSON Web Key (JWK) inspector — validate bounded public RSA, EC, or Ed25519 keys and calculate RFC 7638 SHA-256 thumbprints without ownership or trust claims.
OtherLiveeip155:8453Exactvia cdp
Jwk-inspectJson-web-keyPublic-keyRfc7638Thumbprint
Calls · 30d
2↑ 7.7%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 29 snapshots so far.
$24.55
Verified settled volume
1,041 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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.
1
Unique payers · 30d
Last called 2026-09-15 06:32Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2The 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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x8C12…Df1b2. The signed payment is good for 5 minutes.
- Paid to
- 0x8C12…Df1b2
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
5000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x8C12…Df1b2
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
5000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x8C12…Df1b2
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"jwk": {
"e": "AQAB",
"n": "0vx7agoebGcQSuuPiLJXZptN9nndrQmbXEps2aiAFbWhM78LhWx4cbbfAAtVT86zwu1RK7aPFFxuhDR1L6tSoc_BJECPebWKRXjBZCiFV4n3oknjhMstn64tZ_2W-5JsGY4Hc5n9yBXArwl93lqt7_RN5w6Cf0h4QyQ5v-65YGjQR0_FDW2QvzqY368QQMicAtaSqzs8KJZgnYb9c7d0zgdAZHzu6qMQvRL5hajrn1n91CbOpbISD08qNLyrdkt-bFTWhAI4vMQFh6WeZu0fM4lFd2NcRwr3XPksINHaQ-G_xBniIqbw0Ls1jF44-csFCur-kEgU8awapJzKnqDKgw",
"alg": "RS256",
"kid": "2011-04-29",
"kty": "RSA",
"use": "sig",
"key_ops": [
"verify"
]
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"keys": [
{
"alg": "RS256",
"kid": "2011-04-29",
"kty": "RSA",
"use": "sig",
"bits": 2048,
"curve": "",
"key_ops": [
"verify"
],
"warnings": [],
"thumbprint_sha256": "NzbLsXh8uDCcd-6MNwXF4W_7noWXFZAfHkxZsRGC9Xs"
}
],
"kind": "single",
"warnings": [
"JWK metadata and thumbprints do not establish protocol suitability, key ownership, identity, or trust."
],
"key_count": 1,
"operation": "jwk-inspect",
"algorithm_version": "rfc7638-public-jwk-inspect-v1"
}
}
},
"tags": [
"jwk-inspect",
"json-web-key",
"public-key",
"rfc7638",
"thumbprint"
],
"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": [
"jwk"
],
"properties": {
"jwk": {
"type": "object",
"oneOf": [
{
"not": {
"anyOf": [
{
"required": [
"crv"
]
},
{
"required": [
"x"
]
},
{
"required": [
"y"
]
}
]
},
"required": [
"n",
"e"
],
"properties": {
"kty": {
"const": "RSA"
}
}
},
{
"not": {
"anyOf": [
{
"required": [
"n"
]
},
{
"required": [
"e"
]
}
]
},
"required": [
"crv",
"x",
"y"
],
"properties": {
"kty": {
"const": "EC"
}
}
},
{
"not": {
"anyOf": [
{
"required": [
"n"
]
},
{
"required": [
"e"
]
},
{
"required": [
"y"
]
}
]
},
"required": [
"crv",
"x"
],
"properties": {
"kty": {
"const": "OKP"
}
}
}
],
"required": [
"kty"
],
"properties": {
"e": {
"type": "string",
"description": "RSA exponent as canonical base64urlUInt"
},
"n": {
"type": "string",
"description": "RSA modulus as canonical base64urlUInt"
},
"x": {
"type": "string",
"description": "Canonical base64url x coordinate or Ed25519 public bytes"
},
"y": {
"type": "string",
"description": "Canonical base64url EC y coordinate"
},
"alg": {
"type": "string",
"description": "Optional advertised signing algorithm, checked for key compatibility but not endorsed"
},
"crv": {
"enum": [
"P-256",
"P-384",
"P-521",
"Ed25519"
],
"type": "string",
"description": "EC or OKP curve"
},
"kid": {
"type": "string",
"maxLength": 128,
"minLength": 1,
"description": "Optional nonempty public key identifier; unique within a set"
},
"kty": {
"enum": [
"RSA",
"EC",
"OKP"
],
"type": "string",
"description": "Supported public key type"
},
"use": {
"type": "string",
"const": "sig",
"description": "Optional signing-key use"
},
"x5c": {
"type": "array",
"items": {
"type": "string",
"description": "Base64 certificate metadata"
},
"maxItems": 8,
"description": "Untrusted certificate strings; never parsed or trusted"
},
"x5t": {
"type": "string",
"description": "Untrusted SHA-1 certificate thumbprint metadata"
},
"x5u": {
"type": "string",
"description": "Untrusted certificate URL metadata; never fetched"
},
"key_ops": {
"type": "array",
"items": {
"type": "string",
"const": "verify",
"description": "Public verification operation"
},
"maxItems": 1,
"minItems": 1,
"description": "Optional singleton verify operation"
},
"x5t#S256": {
"type": "string",
"description": "Untrusted SHA-256 certificate thumbprint metadata"
}
},
"description": "One supported public signing JWK with no private material",
"additionalProperties": false
}
},
"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": [
"operation",
"algorithm_version",
"kind",
"key_count",
"keys",
"warnings"
],
"properties": {
"keys": {
"type": "array",
"items": {
"type": "object",
"required": [
"kty",
"kid",
"use",
"key_ops",
"alg",
"curve",
"bits",
"thumbprint_sha256",
"warnings"
],
"properties": {
"alg": {
"type": "string",
"description": "Compatible advertised algorithm or empty; not a security endorsement"
},
"kid": {
"type": "string",
"description": "Public key identifier or empty"
},
"kty": {
"type": "string",
"description": "Validated key type"
},
"use": {
"type": "string",
"description": "Validated sig use or empty"
},
"bits": {
"type": "integer",
"maximum": 8192,
"minimum": 256,
"description": "Validated public key or curve bit size"
},
"curve": {
"type": "string",
"description": "Validated curve or empty for RSA"
},
"key_ops": {
"type": "array",
"items": {
"type": "string",
"description": "verify operation"
},
"maxItems": 1,
"description": "Validated public operations"
},
"warnings": {
"type": "array",
"items": {
"type": "string",
"description": "Human-readable warning"
},
"maxItems": 8,
"description": "Key-local certificate URL/chain handling warnings"
},
"thumbprint_sha256": {
"type": "string",
"pattern": "^[A-Za-z0-9_-]{43}$",
"description": "RFC 7638 SHA-256 JWK Thumbprint in base64url form"
}
},
"description": "Normalized validated public JWK metadata",
"additionalProperties": false
},
"maxItems": 32,
"minItems": 1,
"description": "Normalized public key metadata and thumbprints"
},
"kind": {
"enum": [
"single",
"set"
],
"type": "string",
"description": "Selected request branch"
},
"_atlas": {
"type": "object",
"required": [
"docs"
],
"properties": {
"docs": {
"type": "string",
"format": "uri",
"maxLength": 512,
"description": "Documentation URL for this bridge"
},
"related": {
"type": "array",
"items": {
"type": "object",
"required": [
"bridge",
"url",
"docs",
"summary"
],
"properties": {
"url": {
"type": "string",
"format": "uri",
"maxLength": 512,
"description": "Related route URL"
},
"docs": {
"type": "string",
"format": "uri",
"maxLength": 512,
"description": "Related bridge documentation URL"
},
"bridge": {
"type": "string",
"maxLength": 64,
"description": "Related bridge name"
},
"summary": {
"type": "string",
"maxLength": 256,
"description": "Short capability summary"
}
},
"description": "One related Atlas route",
"additionalProperties": false
},
"maxItems": 3,
"description": "Bounded related Atlas routes"
}
},
"description": "Atlas documentation and related-route metadata added after deployment",
"additionalProperties": false
},
"warnings": {
"type": "array",
"items": {
"type": "string",
"description": "Human-readable warning"
},
"maxItems": 8,
"description": "Route-level trust and suitability limitations"
},
"key_count": {
"type": "integer",
"maximum": 32,
"minimum": 1,
"description": "Number of validated public keys"
},
"operation": {
"type": "string",
"const": "jwk-inspect",
"description": "Stable operation name"
},
"algorithm_version": {
"type": "string",
"const": "rfc7638-public-jwk-inspect-v1",
"description": "Pinned public JWK and thumbprint contract"
}
},
"additionalProperties": false
}
}
}
}
},
"category": "utilities"
}
}Provenance
- Seen in the source catalog
- 2026-09-15 06:32Z
- Last indexed by Roundhouse
- 2026-09-25 02:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 13:15Z
- 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. 29 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 Artifact Inspector 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=Artifact%20Inspector' 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://artifact-inspector.use.x402atlas.com/jwk, 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.