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Hearth x402 API Discovery
x402
Hearth x402 API Discovery is a paid API for AI agents from 138-197-15-135.sslip.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).
Searches and ranks x402-compatible APIs by a plain-language task query, returning usage signals, pricing, and URLs for AI agent consumption
Price / call$0.005
Success—
StatusUnknown
How this service works
x402 pay-safety precheck, ranked x402 API discovery, onchain (Base/EVM/Solana) data and web-to-Markdown for AI agents. Pay per call with x402 (USDC on Base).
Output
A JSON object containing the original query string and an array of ranked API results, each with the endpoint URL, a qualitative usage signal (e.g. 'organic repeat usage'), price in USD per call, and 30-day usage stats including total calls, unique payers, and calls-per-payer ratio.
Example use cases
Find cheapest onchain data API
“Search Hearth for x402 APIs that return onchain data on Base, max $0.01 per call — give me the top 3 results ranked by usage.”
Discover web scraping APIs for agents
“I need to find x402-compatible APIs for converting web pages to Markdown. Search Hearth and show me the top 5 options with their prices and usage stats.”
Evaluate API options before paying
“Before I commit to paying, can you use Hearth to discover the best-ranked x402 APIs for sentiment analysis, on any network, priced under $0.05 per call?”
Technical details
Endpoint
GEThttps://138-197-15-135.sslip.io/v1/x402/discover?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to dynamically discover which x402 pay-per-call APIs are available for a given task, especially when you want ranked results with real usage signals and price constraints. Prefer it over static API directories when you need live, usage-weighted rankings and want to filter by blockchain network or budget before committing a payment.
Side effects
- Missing required 'q' query parameter returns a validation error
- No matching APIs found returns an empty results array
- Network filter with unsupported chain name may return zero results or an error
- maxPrice filter set too low may yield no results
- Malformed query parameters may cause a 400-level response
- x402 payment failure blocks access before the query is processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"q": "web search",
"results": [
{
"url": "https://…/search",
"signal": "organic repeat usage",
"priceUsd": 0.01,
"usage30d": {
"calls": 4000,
"payers": 120,
"callsPerPayer": 33.3
}
}
]
}
}Tags
x402
Reviews
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