Stride20k
Agent data gateway plus the live x402 market feed. Normalized, schema-stable JSON for crypto prices, DeFi TVL, on-chain DEX pools, gas, FX, US Treasury yields, US weather, WHOIS, DNS, email validation, web-page extraction, tech news, Wikipedia, npm/PyPI package health, ERC-20 token-risk scoring, and composed domain dossiers, plus x402 ecosystem analytics and metered LLM inference. Pay per call with USDC via the x402 protocol; no accounts, no API keys.
DataLiveeip155:8453Exactvia cdp
Knowledge
Calls · 30d
8↓ 14%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$1.62
Verified settled volume
65 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
Listed price
As published in the catalog. Always read the live 402 before paying.
7
Calls · 30d
Upstream's own call count for this endpoint, not ours.
5
Unique payers · 30d
Last called 2026-08-31 01:32Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x552Cc4A10878C7F20574489D47184249657Ca3f6The 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"ok": false,
"error": {
"code": "PAYMENT_REQUIRED",
"message": "Get the English Wikipedia summary for a topic. Price: $0.003 (USDC via x402). Machine-readable catalog: /.well-known/x402.json",
"retryable": true
},
"preview": {
"note": "Example of the exact envelope a paid call returns.",
"example": {
"ok": true,
"data": {
"kind": "standard",
"lang": "en",
"title": "Alan Turing",
"extract": "Alan Mathison Turing was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist.",
"pageUrl": "https://en.wikipedia.org/wiki/Alan_Turing",
"description": "English computer scientist (1912–1954)",
"thumbnailUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Alan_Turing.jpg/330px-Alan_Turing.jpg",
"wikibaseItem": "Q7251"
},
"meta": {
"cached": false,
"source": "Wikipedia REST API",
"fetchedAt": "2026-07-04T00:00:00.000Z",
"attribution": "Content from Wikipedia, licensed CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/)"
},
"endpoint": "/knowledge/wiki/:title"
}
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.003USDC≈ $0.003 USD
on Base · exact scheme
Pay 0.003 USDC on Base to 0x552C…Ca3f6. The signed payment is good for 1 minute.
- Paid to
- 0x552C…Ca3f6
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 3000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x552Cc4A10878C7F20574489D47184249657Ca3f6",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"pathParams": {
"title": "Alan Turing"
},
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"ok": true,
"data": {
"kind": "standard",
"lang": "en",
"title": "Alan Turing",
"extract": "Alan Mathison Turing was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist.",
"pageUrl": "https://en.wikipedia.org/wiki/Alan_Turing",
"description": "English computer scientist (1912–1954)",
"thumbnailUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Alan_Turing.jpg/330px-Alan_Turing.jpg",
"wikibaseItem": "Q7251"
},
"meta": {
"cached": false,
"source": "Wikipedia REST API",
"fetchedAt": "2026-07-04T00:00:00.000Z",
"attribution": "Content from Wikipedia, licensed CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/)"
},
"endpoint": "/knowledge/wiki/:title"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"pathParams": {
"type": "object",
"required": [
"title"
],
"properties": {
"title": {
"type": "string",
"description": "Article title (e.g. 'Alan Turing' or 'Alan_Turing')."
}
}
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"ok",
"endpoint",
"data",
"meta"
],
"properties": {
"ok": {
"type": "boolean",
"description": "true on success."
},
"data": {
"type": "object",
"required": [
"title",
"extract",
"pageUrl"
],
"properties": {
"kind": {
"type": "string",
"description": "'standard' or 'disambiguation'."
},
"lang": {
"type": "string",
"description": "Language code (en)."
},
"title": {
"type": "string",
"description": "Canonical article title."
},
"extract": {
"type": "string",
"description": "Lead-section summary text."
},
"pageUrl": {
"type": "string",
"description": "Canonical desktop page URL."
},
"description": {
"type": "string",
"description": "Short description line, or null."
},
"thumbnailUrl": {
"type": "string",
"description": "Lead image thumbnail URL, or null."
},
"wikibaseItem": {
"type": "string",
"description": "Wikidata item id (e.g. Q7259), or null."
}
}
},
"meta": {
"type": "object",
"required": [
"source",
"cached",
"fetchedAt"
],
"properties": {
"cached": {
"type": "boolean",
"description": "Whether this response was served from cache."
},
"source": {
"type": "string",
"description": "Upstream source: Wikipedia REST API."
},
"fetchedAt": {
"type": "string",
"description": "ISO 8601 time the data was actually retrieved from the upstream."
},
"attribution": {
"type": [
"string",
"null"
],
"description": "Licensing attribution when the source requires it."
}
}
},
"endpoint": {
"type": "string",
"description": "Always \"/knowledge/wiki/:title\"."
}
}
}
}
}
}
},
"routeTemplate": "/knowledge/wiki/:title"
}
}Provenance
- Seen in the source catalog
- 2026-08-31 01:32Z
- Last indexed by Roundhouse
- 2026-09-24 22:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-14 00:45Z
- x402 version
- 2
- Max timeout
- 60s
- 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. 30 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 Stride20k 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=Stride20k' 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://gateway.stride20k.com/knowledge/wiki/:title, 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.