SAVER Verifier Fact Checking
SAVER Verifier — independent, cited fact checks for agent research and reports. Pay 0.20 USDC per verification with x402.
SearchLiveeip155:8453Exactvia cdp
Fact-checkingClaim-verificationStatisticsSource-attributionResearch-reports
Calls · 30d
36
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.
$10.40
Verified settled volume
52 settlements proven x402 by their on-chain EIP-3009 marker.
$0.200
Listed price
As published in the catalog. Always read the live 402 before paying.
37
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-26 09:04Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xdfd6cb683F5288e1dD1337E84C09b490857CC110The 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.
0.2USDC≈ $0.2 USD
on Base · exact scheme
Pay 0.2 USDC on Base to 0xdfd6…CC110. The signed payment is good for 5 minutes.
- Paid to
- 0xdfd6…CC110
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 200000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xdfd6cb683F5288e1dD1337E84C09b490857CC110",
"amount": "200000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"claim": "The IEA's Global EV Outlook 2024 reports that electric cars represented around 18% of new cars sold worldwide in 2023 and that the global electric-car stock reached about 40 million. The 18% figure is a sales share, not the share of all cars already on the road.",
"context": "Before publishing a transport-market briefing, check the sales and fleet figures against the cited original report: https://www.iea.org/reports/global-ev-outlook-2024/trends-in-electric-cars . Keep the reporting year and the distinction between sales and stock explicit."
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"domain": "general-verification",
"status": "supported",
"sources": [
{
"id": "s1",
"url": "https://www.iea.org/reports/global-ev-outlook-2024/trends-in-electric-cars",
"title": "iea.org"
}
],
"evidence": [
{
"id": "e1",
"text": "The IEA Global EV Outlook 2024 page says: 'Almost 14 million new electric cars were registered globally in 2023, bringing their total number on the roads to 40 million.' This supports the claim's 2023 global electric-car stock figure and identifies it as cars on the road.",
"relation": "supports",
"sourceIds": [
"s1"
]
},
{
"id": "e2",
"text": "The same IEA page says: 'Electric cars accounted for around 18% of all cars sold in 2023, up from 14% in 2022...' This supports the claim's 18% figure and shows it is a sales share for new cars sold in 2023, not the share of all cars already on the road.",
"relation": "supports",
"sourceIds": [
"s1"
]
},
{
"id": "e3",
"text": "The IEA page labels the relevant section 'Electric car sales' and includes a chart note stating that BEV and PHEV figures include passenger cars only, providing context for the scope of the sales and stock figures.",
"relation": "context",
"sourceIds": [
"s1"
]
}
],
"requestId": "saver-professional-example-20261018-ev-market-check",
"timestamp": "2026-10-18T14:26:20.190Z",
"confidence": 0.99,
"explanation": "The claim is supported by the cited IEA Global EV Outlook 2024 page. The report says almost 14 million new electric cars were registered globally in 2023 and that this brought the total number of electric cars on roads to 40 million. In the next sentence, it states that electric cars accounted for around 18% of all cars sold in 2023. Because the 18% is explicitly described as a share of cars sold in 2023, while the 40 million figure is described as the total number on the roads, the claim correctly distinguishes sales share from stock/fleet share.",
"schemaVersion": "2.0",
"confidenceType": "model_assessed"
}
}
},
"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": [
"claim"
],
"properties": {
"claim": {
"type": "string",
"pattern": "\\S",
"maxLength": 8000,
"minLength": 1,
"description": "One factual claim to check, preserving its figures, dates and qualifications."
},
"context": {
"type": [
"string",
"null"
],
"maxLength": 12000,
"description": "Optional source URL, publication date, reporting period, jurisdiction or definitions needed to assess the claim; null is absent. At most 12000 UTF-16 code units."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"status",
"confidence",
"explanation",
"evidence",
"sources",
"domain",
"timestamp",
"schemaVersion",
"requestId",
"confidenceType"
],
"properties": {
"domain": {
"type": "string"
},
"status": {
"enum": [
"supported",
"contradicted",
"mixed",
"insufficient_evidence"
],
"type": "string"
},
"sources": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"title",
"url"
],
"properties": {
"id": {
"type": "string"
},
"url": {
"type": "string",
"format": "uri"
},
"title": {
"type": "string"
}
},
"additionalProperties": false
}
},
"evidence": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"text",
"relation",
"sourceIds"
],
"properties": {
"id": {
"type": "string"
},
"text": {
"type": "string"
},
"relation": {
"enum": [
"supports",
"contradicts",
"context"
],
"type": "string"
},
"sourceIds": {
"type": "array",
"items": {
"type": "string"
},
"minItems": 1,
"uniqueItems": true
}
},
"additionalProperties": false
},
"maxItems": 10
},
"requestId": {
"type": "string"
},
"timestamp": {
"type": "string",
"format": "date-time"
},
"confidence": {
"type": "number",
"maximum": 1,
"minimum": 0
},
"explanation": {
"type": "string"
},
"schemaVersion": {
"type": "string",
"const": "2.0"
},
"confidenceType": {
"type": "string",
"const": "model_assessed"
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 13:23Z
- Last indexed by Roundhouse
- 2026-10-26 17:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-18 11:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
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. 10 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 SAVER Verifier Fact Checking 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=SAVER%20Verifier%20Fact%20Checking' 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.saververify.com/v2/verify, 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.