Quant Agent Shop
On-page SEO audit of one URL: redirects, title and description lengths, canonical, robots meta and robots.txt for Googlebot, GPTBot and ClaudeBot, hreflang, headings, image alt, links, Open Graph, JSON-LD, sitemap, security headers with a grade, and a list of issues. Use to check a page before or after publishing. Reads the first 300 KB; no JavaScript rendering. Social networks are refused. Typical response 1 to 3 s. Failed calls are not charged.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.01 USDC on Base to 0x4d8d…38309. The signed payment is good for 2 minutes.
- Paid to
- 0x4d8d…38309
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4d8d8D4f04512029172e0176744Eec4AE5238309",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://www.x402.org/"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ms": 412,
"url": "https://www.x402.org/",
"hops": [
{
"url": "https://www.x402.org/",
"status": 200
}
],
"lang": "en",
"links": {
"external": 9,
"internal": 14,
"nofollow": 0
},
"title": {
"text": "x402 - Payment Required",
"length": 23
},
"words": 830,
"images": {
"total": 8,
"missing_alt": 2
},
"issues": [
"title under 30 characters",
"meta description under 70 characters",
"2 images missing alt",
"no JSON-LD"
],
"status": 200,
"favicon": "/favicon.ico",
"twitter": {
"twitter:card": "summary_large_image"
},
"headings": {
"h1": [
"x402"
],
"h2_count": 6,
"h3_count": 4
},
"hreflang": [],
"canonical": "https://www.x402.org/",
"final_url": "https://www.x402.org/",
"checked_at": "2026-10-22T09:00:00+00:00",
"open_graph": {
"og:title": "x402"
},
"robots_txt": {
"found": true,
"allowed": {
"*": true,
"GPTBot": true,
"ClaudeBot": true,
"Googlebot": true
},
"sitemaps": [
"https://www.x402.org/sitemap.xml"
],
"crawl_delay": null
},
"robots_meta": null,
"json_ld_types": [],
"sitemap_found": true,
"meta_description": {
"text": "An open protocol for internet-native payments.",
"length": 46
},
"security_headers": {
"csp": false,
"hsts": true,
"grade": "C",
"referrer_policy": true,
"x_frame_options": true,
"permissions_policy": false,
"x_content_type_options": true
}
}
}
},
"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": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"title": "Url",
"format": "uri",
"maxLength": 2083,
"minLength": 1,
"description": "Public http or https page to audit."
}
},
"additionalProperties": false
},
"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"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 10:48Z
- Last indexed by Roundhouse
- 2026-10-26 20:00Z
- Last enriched (probe, favicon, geo)
- 2026-10-22 19:17Z
- x402 version
- 2
- Max timeout
- 120s
- 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. 4 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 Quant Agent Shop 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=Quant%20Agent%20Shop' 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://quantagentshop.com/v1/seo-audit, 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.