topic-scorer
An MCP server that scores a page or draft against 11,485 public taxonomy categories, returns its rank per taxonomy, and gives you the phrases it still needs. $0.05 per call.
DataLiveeip155:8453Exactvia cdp
Calls · 30d
2↑ 75%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far.
$1.45
Verified settled volume
9 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-17 06:16Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x88ff5A0608Ff45077f68200AF35618121a0FA443The 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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0x88ff…FA443. The signed payment is good for 1 minute.
- Paid to
- 0x88ff…FA443
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 50000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tool": "topic_scorer_gate",
"nonce": "0x66ae557fef542e4fe515d914bfa2231da821578774bdfa0d5b77019f5c1b516c",
"expiry": 1789626066,
"version": "2",
"priceUsd": "0.05"
},
"payTo": "0x88ff5A0608Ff45077f68200AF35618121a0FA443",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"text": "example",
"category": "example",
"taxonomy": "google_ads_topics"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"top": [
{
"id": "344",
"path": "...",
"rank": 1,
"score": 0.842
}
],
"pass": true,
"target": {
"id": "344",
"path": "...",
"rank": 1,
"score": 0.842,
"gap_to_top": 0
},
"min_rank": 3,
"phrases_used": [
"firewall"
],
"phrases_unused": [
"intrusion detection"
]
}
}
},
"schema": {
"type": "object",
"$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": [
"text",
"taxonomy",
"category"
],
"properties": {
"full": {
"type": "boolean",
"default": false,
"description": "Score the whole text as the mean of 8,192-char chunks instead of only the first 8,192 chars."
},
"text": {
"type": "string",
"maxLength": 32768,
"minLength": 1,
"description": "The page or draft text to score, as plain text or HTML (tags are stripped). 1 to 32768 characters. URLs are not fetched; send the content."
},
"phrases": {
"type": "integer",
"default": 30,
"maximum": 100,
"minimum": 0,
"description": "Phrase bank size for the target category (0 skips it)."
},
"category": {
"type": "string",
"maxLength": 200,
"minLength": 1,
"description": "Target category id, full path, or a unique path substring within the taxonomy (use topic_scorer_find to look one up)."
},
"min_rank": {
"type": "integer",
"default": 3,
"maximum": 50,
"minimum": 1,
"description": "Highest passing rank."
},
"taxonomy": {
"enum": [
"google_ads_topics",
"google_merchant",
"iab_content",
"iab_audience",
"iab_ad_product",
"linkedin_industries"
],
"type": "string",
"description": "Taxonomy of the target category."
}
},
"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
- 2026-09-17 06:16Z
- Last indexed by Roundhouse
- 2026-09-25 12:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 00:45Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 405
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. 21 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 topic-scorer 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=topic-scorer' 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://topic-scorer.pixelcove.co/v1/gate, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.