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Shoal API – Signal by Category
x402
Shoal API – Signal by Category is a paid API for AI agents from api.shoal.xyz, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-10).
Retrieves signal data filtered by a specified category via pay-per-request access with no API key required.
Price / call$0.025
Success—
StatusUnknown
How this service works
Pay-per-request API access with no API key required.
Output
A JSON object containing a data array of signals belonging to the requested category. The array may be empty if no signals are found for that category.
Example use cases
Example prompt
“Can you pull the latest signals from Shoal for the 'crypto' category and show me what comes back?”
Technical details
Endpoint
GEThttps://api.shoal.xyz/v1/signal/byCategory?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-demand, pay-per-request signal data filtered by category and do not want to manage API key subscriptions. Ideal for agents that need occasional or low-frequency signal lookups and prefer micropayment-based access via the x402 protocol.
Side effects
- Payment not received — 402 response if USDC micropayment is not processed
- Invalid or missing category parameter — empty data array or error response
- Category not found — returns empty data array
- Network timeout — no response from api.shoal.xyz
- Malformed request parameters — server-side validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": []
}
}Tags
x402
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