cited-research
Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, built from real page content - no invented facts. A fast paid LLM writes it, under 4.5s guaranteed; on a rare miss, a no-LLM extractive fallback (top sentences from the sources, picked by Jev) takes over instead, marked "synthesis":"extractive". Try GET /research/sample.
SearchLiveeip155:8453Exactvia wellknown:x402.agentindex.world
Research report with sourcesCited answerWeb research
Calls · 30d
3→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$1.51
Verified settled volume
563 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69dThe 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": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402.agentindex.world/research",
"tags": [
"research report with sources",
"cited answer",
"web research"
],
"iconUrl": "https://x402.agentindex.world/icon.png",
"mimeType": "application/json",
"description": "Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, built from real page content - no invented facts. A fast paid LLM writes it, under 4.5s guaranteed; on a rare miss, a no-LLM extractive fallback (top sentences from the sources, picked by Jev) takes over instead, marked \"synthesis\":\"extractive\". Try GET /research/sample.",
"serviceName": "cited-research"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"query": "What are the main features of the Rust programming language?"
},
"type": "http",
"method": "GET",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"query": "What are the main features of the Rust programming language?",
"answer": "The main features of the Rust programming language include an emphasis on performance, type safety, concurrency, and memory safety [1]. Rust supports multiple programming paradigms [1]. The language's syntax is heavily influenced by C++ and functional programming languages such as OCaml [2]. Rust has a focus on static typing and a borrow system, similar to other systems programming languages [5]. However, sources [3] and [4] do not provide information about Rust, instead discussing other programming languages, Zig and V, respectively. Overall, the sources suggest that Rust is a systems programming language with a strong focus on safety and performance [1][2][5].",
"sources": [
{
"url": "https://en.wikipedia.org/wiki/Rust_(programming_language)",
"title": "Rust (programming language)",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/Rust_syntax",
"title": "Rust syntax",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/Zig_(programming_language)",
"title": "Zig (programming language)",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/V_(programming_language)",
"title": "V (programming language)",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/Mojo_(programming_language)",
"title": "Mojo (programming language)",
"source": "wikipedia",
"published_at": null
}
],
"synthesis": "llm",
"timing_ms": {
"total": 2160,
"search": 1230,
"verify": 287,
"synthesis": 644
},
"claims_verified": true,
"claims_verified_reason": null
}
}
},
"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": [
"query"
],
"properties": {
"query": {
"type": "string",
"description": "The research question to answer, up to 500 characters."
},
"max_sources": {
"type": "integer",
"description": "How many web sources to consider, 1-10. Default 5."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
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"json",
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"text"
],
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},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"query",
"answer",
"synthesis",
"sources",
"claims_verified",
"timing_ms"
],
"properties": {
"query": {
"type": "string"
},
"answer": {
"type": "string",
"description": "5-8 sentences, each claim cited inline as [n] referring to the sources array (1-indexed)."
},
"sources": {
"type": "array",
"items": {
"type": "object",
"properties": {
"url": {
"type": "string"
},
"title": {
"type": "string"
},
"source": {
"type": "string"
},
"published_at": {
"type": [
"string",
"null"
]
}
}
}
},
"synthesis": {
"enum": [
"llm",
"extractive"
],
"type": "string",
"description": "'llm' when a paid fast model wrote the answer (the common case). 'extractive' when that model missed its own tight time cap and the answer is instead the most relevant sentences already present in the sources, verbatim, picked by Jev - never a second LLM call."
},
"timing_ms": {
"type": "object",
"description": "search, synthesis, verify, total, in milliseconds."
},
"x402_receipt": {
"type": "object",
"description": "Billing and provenance receipt for this call."
},
"claims_verified": {
"type": "boolean",
"description": "True only if a Jev check confirmed the answer's citations are supported. False if unsupported OR if verification was skipped/timed out - see claims_verified_reason."
},
"claims_verified_reason": {
"type": [
"string",
"null"
],
"description": "Why claims_verified is false: 'jev_found_unsupported_claim', 'verification_timed_out_or_failed', 'insufficient_time_budget_remaining', or null when verified true."
}
}
}
}
}
}
}
}
},
"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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0xb3F3…BA69d. The signed payment is good for 5 minutes.
- Paid to
- 0xb3F3…BA69d
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
"price": "$0.005",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"query": "What are the main features of the Rust programming language?"
},
"type": "http",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"query": "What are the main features of the Rust programming language?",
"answer": "The main features of the Rust programming language include an emphasis on performance, type safety, concurrency, and memory safety [1]. Rust supports multiple programming paradigms [1]. The language's syntax is heavily influenced by C++ and functional programming languages such as OCaml [2]. Rust has a focus on static typing and a borrow system, similar to other systems programming languages [5]. However, sources [3] and [4] do not provide information about Rust, instead discussing other programming languages, Zig and V, respectively. Overall, the sources suggest that Rust is a systems programming language with a strong focus on safety and performance [1][2][5].",
"sources": [
{
"url": "https://en.wikipedia.org/wiki/Rust_(programming_language)",
"title": "Rust (programming language)",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/Rust_syntax",
"title": "Rust syntax",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/Zig_(programming_language)",
"title": "Zig (programming language)",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/V_(programming_language)",
"title": "V (programming language)",
"source": "wikipedia",
"published_at": null
},
{
"url": "https://en.wikipedia.org/wiki/Mojo_(programming_language)",
"title": "Mojo (programming language)",
"source": "wikipedia",
"published_at": null
}
],
"synthesis": "llm",
"timing_ms": {
"total": 2160,
"search": 1230,
"verify": 287,
"synthesis": 644
},
"claims_verified": true,
"claims_verified_reason": null
}
}
},
"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": [
"query"
],
"properties": {
"query": {
"type": "string",
"description": "The research question to answer, up to 500 characters."
},
"max_sources": {
"type": "integer",
"description": "How many web sources to consider, 1-10. Default 5."
}
}
},
"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": [
"query",
"answer",
"synthesis",
"sources",
"claims_verified",
"timing_ms"
],
"properties": {
"query": {
"type": "string"
},
"answer": {
"type": "string",
"description": "5-8 sentences, each claim cited inline as [n] referring to the sources array (1-indexed)."
},
"sources": {
"type": "array",
"items": {
"type": "object",
"properties": {
"url": {
"type": "string"
},
"title": {
"type": "string"
},
"source": {
"type": "string"
},
"published_at": {
"type": [
"string",
"null"
]
}
}
}
},
"synthesis": {
"enum": [
"llm",
"extractive"
],
"type": "string",
"description": "'llm' when a paid fast model wrote the answer (the common case). 'extractive' when that model missed its own tight time cap and the answer is instead the most relevant sentences already present in the sources, verbatim, picked by Jev - never a second LLM call."
},
"timing_ms": {
"type": "object",
"description": "search, synthesis, verify, total, in milliseconds."
},
"x402_receipt": {
"type": "object",
"description": "Billing and provenance receipt for this call."
},
"claims_verified": {
"type": "boolean",
"description": "True only if a Jev check confirmed the answer's citations are supported. False if unsupported OR if verification was skipped/timed out - see claims_verified_reason."
},
"claims_verified_reason": {
"type": [
"string",
"null"
],
"description": "Why claims_verified is false: 'jev_found_unsupported_claim', 'verification_timed_out_or_failed', 'insufficient_time_budget_remaining', or null when verified true."
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- —
- Last indexed by Roundhouse
- 2026-10-18 13:15Z
- Last enriched (probe, favicon, geo)
- 2026-10-02 22:45Z
- x402 version
- —
- 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. 32 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 cited-research 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=cited-research' 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://x402.agentindex.world/research, 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.