Artifact Inspector
JSON Web Token (JWT) decoder — parse an unverified compact JWS header and claims and evaluate advisory NumericDate times without signature verification or URL fetching.
OtherLiveeip155:8453Exactvia cdp
Jwt-decodeJson-web-tokenJwsRfc7519Numericdate
Calls · 30d
4↑ 22%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 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.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
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": {
"token": "eyJhbGciOiJIUzI1NiIsImtpZCI6InN5bnRoZXRpYy1leGFtcGxlIiwidHlwIjoiSldUIn0.eyJhdWQiOiJhcnRpZmFjdC1pbnNwZWN0b3IiLCJleHAiOjE3MTcyODY0MDAsImlhdCI6MTcxNzIwMDAwMCwiaXNzIjoieDQwMkF0bGFzIHN5bnRoZXRpYyIsIm5iZiI6MTcxNzIwMDAwMCwic3ViIjoiYWdlbnQtZGVtbyJ9.c3ludGhldGljLW5vdC1hLXJlYWwtc2lnbmF0dXJl",
"at_time": "2024-06-01T12:00:00Z"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"claims": {
"aud": "artifact-inspector",
"exp": 1717286400,
"iat": 1717200000,
"iss": "x402Atlas synthetic",
"nbf": 1717200000,
"sub": "agent-demo"
},
"header": {
"alg": "HS256",
"kid": "synthetic-example",
"typ": "JWT"
},
"at_time": "2024-06-01T12:00:00Z",
"temporal": {
"issued_at": {
"value": 1717200000,
"status": "past_or_present"
},
"expiration": {
"value": 1717286400,
"status": "valid"
},
"not_before": {
"value": 1717200000,
"status": "active"
}
},
"warnings": [
"JWT signature and claims were decoded but not verified; treat all values as untrusted."
],
"operation": "jwt-decode",
"signature_bytes": 30,
"signature_status": "not_verified",
"algorithm_version": "jwt-unverified-decode-v1"
}
}
},
"tags": [
"jwt-decode",
"json-web-token",
"jws",
"rfc7519",
"numericdate"
],
"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": [
"token",
"at_time"
],
"properties": {
"token": {
"type": "string",
"pattern": "^[A-Za-z0-9_-]+\\.[A-Za-z0-9_-]+\\.[A-Za-z0-9_-]*$",
"maxLength": 32768,
"minLength": 3,
"description": "One compact three-segment JWS; decoded only and never verified"
},
"at_time": {
"type": "string",
"format": "date-time",
"description": "Fixed RFC3339 instant for advisory NumericDate comparisons"
}
},
"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",
"at_time",
"signature_status",
"header",
"claims",
"signature_bytes",
"temporal",
"warnings"
],
"properties": {
"_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
},
"claims": {
"type": "object",
"description": "Decoded untrusted JWT claims with JSON numbers preserved",
"additionalProperties": true
},
"header": {
"type": "object",
"description": "Decoded untrusted JOSE header; arbitrary members are preserved",
"additionalProperties": true
},
"at_time": {
"type": "string",
"format": "date-time",
"description": "Applied advisory comparison instant"
},
"temporal": {
"type": "object",
"required": [
"expiration",
"not_before",
"issued_at"
],
"properties": {
"issued_at": {
"type": "object",
"required": [
"status",
"value"
],
"properties": {
"value": {
"type": [
"integer",
"null"
],
"description": "Integral NumericDate or null when absent/invalid"
},
"status": {
"enum": [
"absent",
"invalid",
"valid",
"expired",
"active",
"not_yet_active",
"past_or_present",
"future"
],
"type": "string",
"description": "Advisory comparison status only"
}
},
"description": "One advisory NumericDate comparison",
"additionalProperties": false
},
"expiration": {
"type": "object",
"required": [
"status",
"value"
],
"properties": {
"value": {
"type": [
"integer",
"null"
],
"description": "Integral NumericDate or null when absent/invalid"
},
"status": {
"enum": [
"absent",
"invalid",
"valid",
"expired",
"active",
"not_yet_active",
"past_or_present",
"future"
],
"type": "string",
"description": "Advisory comparison status only"
}
},
"description": "One advisory NumericDate comparison",
"additionalProperties": false
},
"not_before": {
"type": "object",
"required": [
"status",
"value"
],
"properties": {
"value": {
"type": [
"integer",
"null"
],
"description": "Integral NumericDate or null when absent/invalid"
},
"status": {
"enum": [
"absent",
"invalid",
"valid",
"expired",
"active",
"not_yet_active",
"past_or_present",
"future"
],
"type": "string",
"description": "Advisory comparison status only"
}
},
"description": "One advisory NumericDate comparison",
"additionalProperties": false
}
},
"description": "Advisory exp, nbf, and iat comparisons against at_time",
"additionalProperties": false
},
"warnings": {
"type": "array",
"items": {
"type": "string",
"description": "Human-readable warning"
},
"maxItems": 40,
"description": "Unverified-token, URL, critical-header, NumericDate, and deterministic overflow-summary warnings"
},
"operation": {
"type": "string",
"const": "jwt-decode",
"description": "Stable operation name"
},
"signature_bytes": {
"type": "integer",
"maximum": 32768,
"minimum": 0,
"description": "Decoded signature segment size; not a validity result"
},
"signature_status": {
"type": "string",
"const": "not_verified",
"description": "Prominent statement that no signature check occurred"
},
"algorithm_version": {
"type": "string",
"const": "jwt-unverified-decode-v1",
"description": "Pinned strict decode contract"
}
},
"additionalProperties": false
}
}
}
}
},
"category": "utilities"
}
}Provenance
- Seen in the source catalog
- 2026-09-15 06:32Z
- Last indexed by Roundhouse
- 2026-09-24 13:30Z
- 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. 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 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/jwt, 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.