Citation and Retraction Check
Verify references before you publish or rely on them: up to 10 citations per call, as reference strings in any style, DOIs, or {title, authors, year, doi}. For each: status verified, mismatch (the work exists but authors, year or DOI are wrong, e.g. a real DOI that points to a different paper), uncertain or not_found (likely invented), the matched record with authors, year, venue, DOI and open-access link, the corrected issues, an APA-formatted reference, and a retraction flag with the notice…
InfraLiveeip155:8453Exactvia cdp
Citation-verificationHallucination-checkRetraction-checkReference-checkDoi-lookup
Calls · 30d
3
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 snapshots so far.
$9.62
Verified settled volume
1,374 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.
2
Unique payers · 30d
Last called 2026-10-26 04:09Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": "https://agentsvc.io/docs",
"hint": "This call costs $0.005 USDC, paid per request with USDC on Base, Solana, Polygon or Arbitrum mainnet via x402. No account, no API key. Easiest: use an x402 client (JavaScript: @x402/fetch + @x402/evm, Python: pip install x402) with a wallet holding USDC on Base; it handles the 402 automatically. Manual: sign an EIP-3009 TransferWithAuthorization for the requirements in accepts[0] (v1) or in the PAYMENT-REQUIRED response header (v2) and retry with the X-PAYMENT (v1) or PAYMENT-SIGNATURE (v2) header.",
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://agentsvc.io/api/v1/proxy/citation-check",
"description": "Verify references before you publish or rely on them: up to 10 citations per call, as reference strings in any style, DOIs, or {title, authors, year, doi}. For each: status verified, mismatch (the work exists but authors, year or DOI are wrong, e.g. a real DOI that points to a different paper), uncertain or not_found (likely invented), the matched record with authors, year, venue, DOI and open-access link, the corrected issues, an APA-formatted reference, and a retraction flag with the notice…",
"outputSchema": {
"input": {
"body": {
"citations": [
"Kahneman D, Tversky A. Prospect theory: An analysis of decision under risk. Econometrica 1979.",
"Wakefield AJ et al. Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children. Lancet 1998.",
"doi:10.9999/fake.2020.12345"
]
},
"type": "http",
"method": "POST",
"bodyType": "json",
"discoverable": true
},
"output": {}
},
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg",
"scheme": "exact",
"network": "solana",
"mimeType": "application/json",
"resource": "https://agentsvc.io/api/v1/proxy/citation-check",
"description": "Verify references before you publish or rely on them: up to 10 citations per call, as reference strings in any style, DOIs, or {title, authors, year, doi}. For each: status verified, mismatch (the work exists but authors, year or DOI are wrong, e.g. a real DOI that points to a different paper), uncertain or not_found (likely invented), the matched record with authors, year, venue, DOI and open-access link, the corrected issues, an APA-formatted reference, and a retraction flag with the notice…",
"outputSchema": {
"input": {
"body": {
"citations": [
"Kahneman D, Tversky A. Prospect theory: An analysis of decision under risk. Econometrica 1979.",
"Wakefield AJ et al. Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children. Lancet 1998.",
"doi:10.9999/fake.2020.12345"
]
},
"type": "http",
"method": "POST",
"bodyType": "json",
"discoverable": true
},
"output": {}
},
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 300
}
],
"payment": {
"asset": "USDC",
"pay_to": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"scheme": "exact",
"network": "eip155:8453",
"chain_id": 8453,
"price_usd": 0.005,
"network_v1": "base",
"also_accepted": {
"see": "accepts[1] (v1 body) or PAYMENT-REQUIRED accepts[1] (v2)",
"pay_to": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"asset_mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
},
"amount_atomic": "5000",
"asset_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"x402_versions_accepted": [
1,
2
]
},
"request": {
"method": "POST",
"content_type": "application/json",
"input_schema": {
"type": "object",
"anyOf": [
{
"required": [
"citations"
]
},
{
"required": [
"doi"
]
},
{
"required": [
"title"
]
}
],
"properties": {
"doi": {
"type": "string",
"description": "Single DOI (alternative to citations)"
},
"year": {
"type": "integer"
},
"title": {
"type": "string",
"description": "Single title (alternative to citations), optionally with authors and year"
},
"authors": {
"type": "array",
"items": {
"type": "string"
}
},
"citations": {
"anyOf": [
{
"type": "array",
"items": {
"anyOf": [
{
"type": "string",
"maxLength": 1000
},
{
"type": "object",
"properties": {
"doi": {
"type": "string"
},
"year": {
"type": "integer"
},
"title": {
"type": "string"
},
"venue": {
"type": "string"
},
"authors": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
]
},
"maxItems": 10,
"minItems": 1
},
{
"type": "string",
"maxLength": 10000
}
],
"description": "1 to 10 references: strings, or {title, authors, year, doi}; or one string with one reference per line"
}
}
},
"example_input": {
"citations": [
"Kahneman D, Tversky A. Prospect theory: An analysis of decision under risk. Econometrica 1979.",
"Wakefield AJ et al. Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children. Lancet 1998.",
"doi:10.9999/fake.2020.12345"
]
}
},
"try_free": "https://agentsvc.io/api/v1/try/citation-check",
"x402Version": 1,
"service_info": "https://agentsvc.io/api/v1/services/citation-check"
}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 0x622e…74F27. The signed payment is good for 5 minutes.
- Paid to
- 0x622e…74F27
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
5000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · 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
- 5JzPS5…977tg
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
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
- 0x622e…74F27
- 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
- 0x622e…74F27
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"citations": [
"Kahneman D, Tversky A. Prospect theory: An analysis of decision under risk. Econometrica 1979.",
"Wakefield AJ et al. Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children. Lancet 1998.",
"doi:10.9999/fake.2020.12345"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"data": {},
"success": true
}
}
},
"tags": [
"citation-verification",
"hallucination-check",
"retraction-check",
"reference-check",
"doi-lookup",
"citation-check",
"reference-verification",
"doi",
"research"
],
"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": [],
"properties": {
"doi": {
"type": "string",
"description": "Single DOI (alternative to citations)"
},
"year": {
"type": "integer"
},
"title": {
"type": "string",
"description": "Single title (alternative to citations), optionally with authors and year"
},
"authors": {
"type": "array",
"items": {
"type": "string"
}
},
"citations": {
"anyOf": [
{
"type": "array",
"items": {
"anyOf": [
{
"type": "string",
"maxLength": 1000
},
{
"type": "object",
"properties": {
"doi": {
"type": "string"
},
"year": {
"type": "integer"
},
"title": {
"type": "string"
},
"venue": {
"type": "string"
},
"authors": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
]
},
"maxItems": 10,
"minItems": 1
},
{
"type": "string",
"maxLength": 10000
}
],
"description": "1 to 10 references: strings, or {title, authors, year, doi}; or one string with one reference per line"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"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": [
"success",
"data"
],
"properties": {
"data": {
"type": "object",
"properties": {
"sources": {
"type": "string"
},
"summary": {
"type": "object"
},
"citations": {
"type": "array"
},
"checked_at": {
"type": "string"
}
}
},
"success": {
"type": "boolean"
}
}
}
}
}
}
},
"category": "text"
},
"builder-code": {
"info": {
"a": "bc_q6wi3opd"
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 04:09Z
- Last indexed by Roundhouse
- 2026-10-26 14:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-15 12:15Z
- x402 version
- 2
- Max timeout
- 300s
- 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. 15 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 Citation and Retraction Check 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=Citation%20and%20Retraction%20Check' 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://agentsvc.io/api/v1/proxy/citation-check, 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.