← The evidence ledger
Evidence row 60263
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://1gateway.dev/v1/web/metadata
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- c2b499503edc30da1d2f5baad7ab1a13f938564152067f096b82496d39fbc9b8
- Leaf
- 0xea82b946444c79547eb013b38a835a3c95a248752acbbb53515227e46c1a22b2
What was observed
{
"endpoints": [
[
"x402",
"https://1gateway.dev/v1/web/metadata"
]
],
"name": "1gateway",
"owner_address": "0x6246eee0355dd7a93c888fe59e1151388a0cc5a1",
"raw": {
"accepts": [
{
"amount": "2000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1",
"scheme": "exact"
}
],
"description": "Use when an agent needs to know what a URL is before reading it, or to build a link preview or citation. Input: url (public http/https). Output: JSON with final URL after redirects, HTTP status, content type, title, description, site name, language, canonical, preview image, favicon, Open Graph and Twitter tags, RSS/Atom feeds, hreflang alternates, JSON-LD types, robots, first H1. No JavaScript is run. Example: ?url=https://developer.mozilla.org/en-US/",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"url": "https://developer.mozilla.org/en-US/"
},
"type": "http"
},
"output": {
"example": {
"alternates": [],
"author": null,
"cache": "miss",
"canonical": "https://developer.mozilla.org/en-US/",
"contentType": "text/html",
"description": "The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.",
"favicon": "https://developer.mozilla.org/favicon.ico",
"feeds": [
{
"href": "https://developer.mozilla.org/en-US/blog/rss.xml",
"title": "MDN Blog RSS Feed",
"type": "application/rss+xml"
}
],
"finalUrl": "https://developer.mozilla.org/en-US/",
"generator": null,
"headingH1": "Resources for Developers, by Developers",
"icons": [
{
"href": "https://developer.mozilla.org/favicon.ico",
"rel": "icon",
"sizes": "32x32"
}
],
"image": "https://developer.mozilla.org/mdn-social-image.46ac2375.png",
"jsonLdTypes": [],
"keywords": [],
"lang": "en-US",
"modifiedTime": null,
"notes": [
"Parsed from the first 512 KiB of the page; JavaScript is not executed."
],
"openGraph": {
"description": "The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.",
"locale": "en_US",
"title": "MDN Web Docs",
"url": "https://developer.mozilla.org/en-US/"
},
"publishedTime": null,
"redirects": [],
"robots": null,
"siteName": "MDN Web Docs",
"status": 200,
"themeColor": null,
"title": "MDN Web Docs",
"truncated": false,
"twitter": {
"card": "summary",
"creator": "MozDevNet"
},
"type": null,
"url": "https://developer.mozilla.org/en-US/"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"url": {
"description": "Public http(s) URL; private/internal addresses → 400 (not charged)",
"examples": [
"https://developer.mozilla.org/en-US/"
],
"maxLength": 2048,
"pattern": "^https?://",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"alternates": {
"items": {},
"type": "array"
},
"author": {
"type": "null"
},
"cache": {
"type": "string"
},
"canonical": {
"type": "string"
},
"contentType": {
"type": "string"
},
"description": {
"type": "string"
},
"favicon": {
"type": "string"
},
"feeds": {
"items": {
"properties": {
"href": {
"type": "string"
},
"title": {
"type": "string"
},
"type": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"finalUrl": {
"type": "string"
},
"generator": {
"type": "null"
},
"headingH1": {
"type": "string"
},
"icons": {
"items": {
"properties": {
"href": {
"type": "string"
},
"rel": {
"type": "string"
},
"sizes": {
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"type": "array"
},
"image": {
"type": "string"
},
"jsonLdTypes": {
"items": {},
"type": "array"
},
"keywords": {
"items": {},
"type": "array"
},
"lang": {
"type": "string"
},
"modifiedTime": {
"type": "null"
},
"notes": {
"items": {
"type": "string"
},
"type": "array"
},
"openGraph": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"publishedTime": {
"type": "null"
},
"redirects": {
"items": {},
"type": "array"
},
"robots": {
"type": "null"
},
"siteName": {
"type": "string"
},
"status": {
"type": "integer"
},
"themeColor": {
"type": "null"
},
"title": {
"type": "string"
},
"truncated": {
"type": "boolean"
},
"twitter": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"type": {
"type": "null"
},
"url": {
"type": "string"
}
},
"required": [
"url",
"finalUrl",
"status",
"contentType",
"redirects",
"truncated",
"title",
"description",
"siteName",
"lang",
"canonical",
"image",
"favicon",
"type",
"author",
"publishedTime",
"modifiedTime",
"keywords",
"robots",
"themeColor",
"generator",
"openGraph",
"twitter",
"icons",
"feeds",
"alternates",
"jsonLdTypes",
"headingH1",
"cache",
"notes"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791609992/bazaar-icons/c4d9db8f8f483844.png",
"lastUpdated": "2026-10-11T00:51:39.996Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-11T00:51:39.661Z"
},
"resource": "https://1gateway.dev/v1/web/metadata",
"serviceName": "1gateway",
"tags": [
"url-metadata",
"link-preview",
"open-graph",
"web",
"seo"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Use when an agent needs to know what a URL is before reading it, or to build a link preview or citation. Input: url (public http/https). Output: JSON with final URL after redirects, HTTP status, content type, title, description, site name, language, canonical, preview image, favicon, Open Graph and Twitter tags, RSS/Atom feeds, hreflang alternates, JSON-LD types, robots, first H1. No JavaScript is run. Example: ?url=https://developer.mozilla.org/en-US/"
}What the leaf hashes
{"body":"c2b499503edc30da1d2f5baad7ab1a13f938564152067f096b82496d39fbc9b8","id":60263,"kind":"listing","method":"baseline/1","observed_us":1793025448179320,"prev":null,"subject":"x402_bazaar:https://1gateway.dev/v1/web/metadata","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).
- 0xea83703592de692d7481a6870a605008f28523ab2a197d0a4de354a699ba2db0
- 0xba8e882cabb2b690975ddeccc535bb35180aa81e53634603e87a938896796e23
- 0x0af69fa535e87ab3a3119abc13aeb637ff9007798db5ef92ba3a9c31f2df715a
- 0x64becf51f399e028d0df02f9f84d81da224150518e050bb083159c0170b2e6bf
- 0x0b01bdc9a39ef278441e5b6d864c2f380b1d247db392d3ba1ac7ac2aa914ca11
- 0xc54a961a0ad964d64fec1c494fda5a843594114f8e0761c673737aaf10acac82
- 0x19d813092a9b62957a4b473dd9ca7c2e91f3c39b22cde65e400486afb3fd6ff4
- 0x1b479ee6501c77be6640c987a82ece503e1478c671309f6ae8e839b73dac9764
- 0xc9f660e7fd6ee4e67e210e92a1fbfffc05d279c753fd0df2747120ced4da24cf
- 0x0b1df5c288d250f6413df247eae63beacd780bb30cceb7665cb037a67632c66b
- 0xdcbb0cc500d2b659c111afe9a926b2aafdcc6f6d034768498b0b7295973f9245
- 0x22a204f0cf299dd3152f1542ba9998ff7665390da1ede6e58d06b8a7b2a107ee
- 0xec98ca25cb12ffed7c3e1373971719ce414ee6deecd1e7724b2979e2c356d99f
- 0x614d844c9e0509d9f9e63697aa2935555bce5f13695a8dc0047aa9e9898d70b3
- 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
- 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
- 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae