← The evidence ledger
Evidence row 2265
Observed , by baseline/1.
- Kind
- listing
- About
- source_record agentic_market:factstamp-agentrails-workers-dev
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- ccef7e38dc0103651eb52b73a39c1108f27a414fd355ae148b1b8d6f29fc4c7b
- Leaf
- 0xa4fa8c9a51b63e871ca51c99686b938c3be03e4b837d1d24e097f8a9d4d91c2c
What was observed
{
"endpoints": [
[
"x402",
"https://factstamp.agentrails.workers.dev/bulk"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/check"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/citation"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/document"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/entity"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/entity-file"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/package"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/watch"
],
[
"x402",
"https://factstamp.agentrails.workers.dev/watch/portfolio"
]
],
"name": "factstamp.agentrails.workers.dev",
"owner_address": null,
"raw": {
"caip2_networks": [
"eip155:8453"
],
"category": "",
"description": "",
"domain": "factstamp.agentrails.workers.dev",
"endpoints": [
{
"description": "Check a whole bibliography or dependency manifest in one round trip, before you rely on the list: up to 12 items at a flat US$0.12 — 1 cent an item, against 2 cents for the same lookups one at a time. Every item is answered by the same door that answers a single call, so the verdicts cannot disagree. Pay per call here, or redeem a prepaid pack code (one answer-pack credit per three items, up to 25 items on that rail).",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "citations",
"required": false,
"type": "array"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "packages",
"required": false,
"type": "array"
}
],
"pricing": {
"amount": "0.12",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "1",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/bulk"
},
{
"description": "Check a dated figure you are about to act on against the publisher's own series, and receive verified, stale, contradicted or unknown with the as-of date. Call it before committing a number to a page, deck, model or decision. Coverage today is Australian primary sources; anything outside coverage returns unknown rather than a guess.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "The RBA cash rate is 4.35% as at August 2026",
"group": "body",
"name": "claim",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.05",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "2"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/check"
},
{
"description": "Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, ambiguous, retracted, not_found, unknown.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "10.1038/nature12373",
"group": "body",
"name": "query",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.02",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "6",
"l30DaysUniquePayers": "2"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/citation"
},
{
"description": "Call it before you send, file or publish a document that quotes figures, names companies or cites papers. Post the text and every checkable claim comes back verified against dated primary sources, as one signed bundle with a per-claim receipt and its licence. Claims we cannot answer are named and never charged, and the preview is free. Verdicts: verified, stale, contradicted, unknown.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "The RBA cash rate was 4.35% as at August 2026. Shopify Inc. is registered in Canada. The method follows doi:10.1038/nature12373.",
"group": "body",
"name": "document",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.25",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "1",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/document"
},
{
"description": "Verify whether a legal entity exists and is currently registered, from open primary registers: the GLEIF LEI index, US SEC EDGAR and the Australian Business Register (ABN, ACN, GST, status). Call it before naming a company in a contract, invoice or filing, or when you need an identifier (ABN, ACN, LEI, CIK) for a company you know only by name. Returns found, ambiguous, not_found or unknown, cited to the register with its retrieval time. A near name match is never reported as a match.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "Shopify Inc.",
"group": "body",
"name": "query",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.1",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/entity"
},
{
"description": "When you need the whole picture of one company before you sign, onboard, pay or acquire, call the entity file: ONE answer holding identity and standing, the registered office, SIC activity and previous names, the filing position, a sanctions screen across four lists, and the ownership chain to the ultimate parent — with ONE coverage block naming every register consulted and every one not. One call and one receipt instead of four. Unknown is a first-class answer.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "00445790",
"group": "body",
"name": "query",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.438119",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/entity-file"
},
{
"description": "Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "npm",
"group": "body",
"name": "ecosystem",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "express@4.18.2",
"group": "body",
"name": "package",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.02",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "1",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/package"
},
{
"description": "Buy a standing re-check of one citation or one package version, when an answer has to stay true rather than be true once: re-checked every day for 30 days. US$0.50 the month — 1.7 cents a check, under a 2-cent lookup. The first check is answered and signed on purchase, and each real change (a retraction, a new advisory, a yanked version) gets its own signed receipt. Pay per call here, or redeem a prepaid pack code (10 credits). Returns a read URL and a token shown once.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "citation",
"group": "body",
"name": "kind",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "10.1038/nature12373",
"group": "body",
"name": "subject",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "https://example.com/factstamp/hook",
"group": "body",
"name": "webhook",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.5",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "1",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/watch"
},
{
"description": "Watch a whole list at once, when a bibliography or a dependency manifest has to stay true: up to 25 citations or package versions re-checked every day for 30 days under one token. US$5 a portfolio — 20 cents a reference, under a cent a check. Every reference is answered and signed on purchase, and each real change gets its own signed receipt. Nothing is sent when nothing changed. Pay per call here, or redeem a prepaid pack code (100 credits).",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "items",
"required": false,
"type": "array"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "https://example.com/factstamp/hook",
"group": "body",
"name": "webhook",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "5",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "1",
"l30DaysUniquePayers": "1"
},
"serviceName": "",
"tags": [],
"url": "https://factstamp.agentrails.workers.dev/watch/portfolio"
}
],
"enriched": false,
"iconUrl": "",
"id": "factstamp-agentrails-workers-dev",
"integrationType": "",
"isNew": false,
"name": "factstamp.agentrails.workers.dev",
"networks": [
"Base"
],
"priceSummary": {
"avgCostBasis": "exact",
"avgCostPerTransaction": "0.722013",
"currency": "USDC",
"maxAmount": "5",
"minAmount": "0.02"
},
"provider": "factstamp.agentrails.workers.dev",
"providerUrl": "",
"serviceName": "",
"tags": []
},
"source": "agentic_market",
"summary": ""
}What the leaf hashes
{"body":"ccef7e38dc0103651eb52b73a39c1108f27a414fd355ae148b1b8d6f29fc4c7b","id":2265,"kind":"listing","method":"baseline/1","observed_us":1793025261697178,"prev":null,"subject":"agentic_market:factstamp-agentrails-workers-dev","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).
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- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae