← The evidence ledger
Evidence row 67364
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://api.mekler.ai/v1/research/papers/find-research-papers
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f6806661c2eccb90ae8ac5baf40cf5f1b085aefd23062419a0928550ee5b2f31
- Leaf
- 0x6f9f826b13683476d3df7588c4383b1115509f01eacf974a4bd971b9faea671e
What was observed
{
"endpoints": [
[
"x402",
"https://api.mekler.ai/v1/research/papers/find-research-papers"
]
],
"name": "Mekler AI",
"owner_address": "0xf6c6e2e530bb311c14a49c1a07c720fc232c07c5",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"meklerQuote": "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.c31337bcb65668b5c1fce26e3c105b13d85ff3cac6e5220a3e4eab37f73816b3",
"memo": "m:wxM3vLZWaLXB_OJuPBBbEw"
},
"maxTimeoutSeconds": 60,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "9mMDrHabSf73MPn1ANdANSmsNw2wKiqE7JZ7eD6EUSRc",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"meklerQuote": "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.70add292459ce033d17ea4b5d931750e6d79959734ad01bd1ed555204886200c",
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 60,
"network": "eip155:8453",
"payTo": "0xF6c6E2e530bb311c14a49C1a07C720fc232c07c5",
"scheme": "exact"
}
],
"description": "Academic paper search by topic or seed DOI/OpenAlex ID. Return ranked publication metadata with identifiers, source provenance, conservative duplicate/version grouping and reported retraction flags from OpenAlex and Crossref. Filter by publication year; retrieve up to 20 results. No abstracts, full text, author identities, exhaustive literature review or quality/retraction clearance.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"limit": 5,
"query": "graph neural networks",
"request_id": "paper-search-example-001"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"cost": {
"charged_supplier_usd": 0,
"hosting_cost_usd": null,
"openalex_list_price_usd": 0.001,
"source_attempts": [
{
"elapsed_ms": 0,
"list_price_usd": 0,
"operation": "search",
"source": "crossref",
"state": "ok"
},
{
"elapsed_ms": 0,
"list_price_usd": 0.001,
"operation": "search",
"source": "openalex",
"state": "ok"
}
],
"supplier_access": "anonymous free allowance; no paid balance"
},
"coverage": {
"complete_source_requests": true,
"crossref_records": 1,
"duplicate_or_version_records_merged": 1,
"normalized_records": 2,
"openalex_records": 1,
"retracted_groups_excluded": 0
},
"mode": "topic",
"ranking": "reciprocal_rank_fusion_k60; explicit identity/version groups; not a quality assessment",
"results": [
{
"doi": "10.5555/mekler.graph.1",
"id": "doi:10.5555/mekler.graph.1",
"is_retraction_notice": false,
"openalex_id": "W9999999901",
"retraction_status": "not_reported",
"source_records": [
{
"id": "W9999999901",
"rank": 1,
"source": "openalex"
},
{
"id": "10.5555/mekler.graph.1",
"rank": 1,
"source": "crossref"
}
],
"sources": [
"crossref",
"openalex"
],
"title": "Graph neural networks for synthetic benchmark data",
"type": "article",
"url": "https://doi.org/10.5555/mekler.graph.1",
"venue": "Synthetic Research Journal",
"versions": [],
"year": 2024
}
],
"retrieved_at": "2026-10-17T00:00:00+00:00",
"returned": 1,
"status": "ok",
"warnings": [
"Metadata coverage and retraction flags can be incomplete or stale. Absence of a flag is not clearance."
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"oneOf": [
{
"not": {
"required": [
"seed"
]
},
"required": [
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]
},
{
"not": {
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]
},
"required": [
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}
],
"properties": {
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"minimum": 1600,
"type": "integer"
},
"include_retracted": {
"default": false,
"type": "boolean"
},
"limit": {
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"maximum": 20,
"minimum": 1,
"type": "integer"
},
"query": {
"maxLength": 240,
"minLength": 3,
"type": "string"
},
"request_id": {
"pattern": "^[a-zA-Z0-9_-]{16,64}$",
"type": "string"
},
"seed": {
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"type": "string"
},
"to_year": {
"maximum": 2100,
"minimum": 1600,
"type": "integer"
}
},
"required": [
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],
"type": "object"
},
"bodyType": {
"enum": [
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"form-data",
"text"
],
"type": "string"
},
"method": {
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"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
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"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"cost": {
"required": [
"source_attempts",
"openalex_list_price_usd",
"charged_supplier_usd"
],
"type": "object"
},
"coverage": {
"type": "object"
},
"mode": {
"type": "string"
},
"ranking": {
"type": "string"
},
"results": {
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"id",
"title",
"sources",
"source_records",
"retraction_status"
],
"type": "object"
},
"type": "array"
},
"retrieved_at": {
"type": "string"
},
"returned": {
"type": "integer"
},
"status": {
"type": "string"
},
"warnings": {
"items": {
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"type": "array"
}
},
"required": [
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"mode",
"results",
"returned",
"coverage",
"ranking",
"cost",
"warnings"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
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],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-19T18:33:59.159Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-19T18:33:58.758Z"
},
"resource": "https://api.mekler.ai/v1/research/papers/find-research-papers",
"serviceName": "Mekler AI",
"tags": [
"Research",
"Academic papers",
"Literature search"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Academic paper search by topic or seed DOI/OpenAlex ID. Return ranked publication metadata with identifiers, source provenance, conservative duplicate/version grouping and reported retraction flags from OpenAlex and Crossref. Filter by publication year; retrieve up to 20 results. No abstracts, full text, author identities, exhaustive literature review or quality/retraction clearance."
}What the leaf hashes
{"body":"f6806661c2eccb90ae8ac5baf40cf5f1b085aefd23062419a0928550ee5b2f31","id":67364,"kind":"listing","method":"baseline/1","observed_us":1793025462653134,"prev":null,"subject":"x402_bazaar:https://api.mekler.ai/v1/research/papers/find-research-papers","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x6f9f88969c5fc8d63483e756cf68e82ccb4cc00c8c85019414339a6afa321f8e
- 0x00c4163e9e8125357ac4888b3d9b64511a2a741678f49812c9ca25e1ab1ae86c
- 0x1ed87b85b149502a838c007c33163495166e07d8e1a4bd86fa69dcb03751386f
- 0x1f002def9f345d2ab5e5aa9aa3baa59eb1358ca163d538836672d970fbd2c7b0
- 0xbb63af0f1b57be1459535d29256e92f80cd02a67ebc8a1f0bd45dd7154bfe38c
- 0xddceb77d233550414f6cbae4aa76b61ebcfefc55351d81e32a7d6a43bff70bf5
- 0xbf7ea28969a2e423a1479e33b846c253f7ca9aa7aef5a3e70813ee3827b3b9aa
- 0x301b4933457feb9b141f4b6dc9598f420736b852c6cb211153da518ff2d21478
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- 0xc70d346129c156fcaba34294b762967bcbb4de7a74526ae0ff9df5eeef4e6d37
- 0x83da3d3b0ffc00454b09f0b6f54a0a4bb8b5fabd87854d6bb2d7abda681b5d72
- 0x5be1d69fd9353c3a75685caffea8c98e8f079f5072011c82517cc5f365ba32f8
- 0x14b83e3bc6587240f31cd033d09d131e0775b7b00aada9042597008a70399013
- 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
- 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
- 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
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- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae