x402 Metadata Drift
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TradingLiveeip155:8453Exactvia cdp
x402Change detectionMonitoringPrice changeAgent commerce
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 5 snapshots so far.
$25.30
Verified settled volume
255 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0060
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 2026-10-05 07:47Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x25e8245f07d5e4873987293dad666afbe56a9608The 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",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"amount": "6000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://api.zfinia.com/x402/v1/x402-metadata-drift",
"tags": [
"x402",
"change detection",
"monitoring",
"price change",
"agent commerce"
],
"mimeType": "application/json",
"description": "Did this paid endpoint change its terms since you last looked? Give it a previous challenge as the baseline and it returns every difference: price changes with old and new amounts, offers added or removed, a protocol version change, and a payee_changed flag when a new recipient address appears. Never pays the endpoint.",
"serviceName": "x402 Metadata Drift"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://api.zfinia.com/x402/v1/company-evidence-pack",
"body": {
"domain": "stripe.com"
},
"method": "POST",
"baseline": {
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"pay_to": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"scheme": "exact",
"network": "eip155:8453"
}
],
"version": 2
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"url": "https://api.zfinia.com/x402/v1/company-evidence-pack",
"method": "POST",
"status": 402,
"changed": true,
"changes": [
{
"to": "60000",
"from": "50000",
"offer": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "60000",
"pay_to": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"scheme": "exact",
"network": "eip155:8453"
},
"change": "PRICE_CHANGED"
}
],
"challenge": {
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "60000",
"pay_to": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"scheme": "exact",
"network": "eip155:8453"
}
],
"version": 2,
"resource": null,
"warnings": [],
"payment_sent": false,
"declared_input": {
"type": "object"
},
"declared_output": {
"type": "object"
}
},
"reachable": true,
"request_id": "example-request",
"service_id": "x402_metadata_drift",
"observed_at": "2026-10-02T00:00:00.000Z",
"change_count": 1,
"payment_sent": false,
"payee_changed": false,
"current_offers": 1,
"baseline_offers": 1,
"service_version": "1.0.0",
"challenge_source": "body",
"challenge_header_present": false
}
}
},
"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": [
"url",
"baseline"
],
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "HTTPS URL of an x402 endpoint on a reviewed origin. Credentials, ports and fragments are refused."
},
"body": {
"type": "object",
"description": "Optional JSON body to send with a POST probe."
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string",
"description": "Method to probe with. Defaults to GET."
},
"baseline": {
"type": "object",
"description": "A challenge object from an earlier preflight or decode, used as the comparison point."
}
},
"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",
"service_id",
"service_version",
"url",
"method",
"observed_at",
"status",
"reachable",
"payment_sent",
"challenge",
"challenge_source",
"challenge_header_present",
"changed",
"change_count",
"changes",
"payee_changed",
"baseline_offers",
"current_offers"
],
"properties": {
"url": {
"type": "string"
},
"method": {
"type": "string"
},
"status": {
"type": "integer"
},
"changed": {
"type": "boolean"
},
"changes": {
"type": "array",
"items": {
"type": "object",
"required": [
"change"
],
"properties": {
"to": {
"type": [
"string",
"null"
]
},
"from": {
"type": [
"string",
"null"
]
},
"offer": {
"type": [
"object",
"null"
]
},
"change": {
"enum": [
"PRICE_CHANGED",
"OFFER_ADDED",
"OFFER_REMOVED",
"PAYEE_CHANGED",
"VERSION_CHANGED"
],
"type": "string"
}
},
"additionalProperties": true
}
},
"challenge": {
"type": [
"object",
"null"
],
"description": "The decoded payment challenge, or null when the endpoint served none."
},
"reachable": {
"type": "boolean"
},
"request_id": {
"type": "string",
"description": "Delivery request identifier; also returned in x-foundry-request-id."
},
"service_id": {
"type": "string",
"description": "Canonical service identifier."
},
"observed_at": {
"type": "string"
},
"change_count": {
"type": "integer"
},
"payment_sent": {
"const": false,
"description": "Always false. This service never pays the endpoint it probes."
},
"payee_changed": {
"type": "boolean",
"description": "A recipient address appeared that was not in the baseline. The change most worth acting on."
},
"current_offers": {
"type": "integer"
},
"baseline_offers": {
"type": "integer"
},
"service_version": {
"type": "string",
"description": "Version of the invoked service."
},
"challenge_source": {
"type": [
"string",
"null"
],
"description": "header or body, depending on where the endpoint put the challenge."
},
"challenge_header_present": {
"type": "boolean"
}
},
"additionalProperties": false
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.006USDC≈ $0.006 USD
on Base · exact scheme
Pay 0.006 USDC on Base to 0x25e8…a9608. The signed payment is good for 1 minute.
- Paid to
- 0x25e8…a9608
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 6000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"amount": "6000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://api.zfinia.com/x402/v1/company-evidence-pack",
"body": {
"domain": "stripe.com"
},
"method": "POST",
"baseline": {
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"pay_to": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"scheme": "exact",
"network": "eip155:8453"
}
],
"version": 2
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"url": "https://api.zfinia.com/x402/v1/company-evidence-pack",
"method": "POST",
"status": 402,
"changed": true,
"changes": [
{
"to": "60000",
"from": "50000",
"offer": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "60000",
"pay_to": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"scheme": "exact",
"network": "eip155:8453"
},
"change": "PRICE_CHANGED"
}
],
"challenge": {
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "60000",
"pay_to": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"scheme": "exact",
"network": "eip155:8453"
}
],
"version": 2,
"resource": null,
"warnings": [],
"payment_sent": false,
"declared_input": {
"type": "object"
},
"declared_output": {
"type": "object"
}
},
"reachable": true,
"request_id": "example-request",
"service_id": "x402_metadata_drift",
"observed_at": "2026-10-02T00:00:00.000Z",
"change_count": 1,
"payment_sent": false,
"payee_changed": false,
"current_offers": 1,
"baseline_offers": 1,
"service_version": "1.0.0",
"challenge_source": "body",
"challenge_header_present": false
}
}
},
"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": [
"url",
"baseline"
],
"properties": {
"url": {
"type": "string",
"maxLength": 2048
},
"body": {
"type": "object"
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"baseline": {
"type": "object"
}
},
"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"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-05 07:47Z
- Last indexed by Roundhouse
- 2026-10-06 00:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-02 10:15Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 402
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. 5 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 x402 Metadata Drift 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=x402%20Metadata%20Drift' 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.zfinia.com/x402/v1/x402-metadata-drift, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.