# SignalDesk AI – API Discovery Search

> SignalDesk AI – API Discovery Search is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-13).

Searches the APIs.guru directory by keyword to return matching public API metadata records

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/discovery/api-search?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-api-discovery-search-e85d89b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_M6oRuWC5zppNrRpiPhUC6

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability signaldesk-ai-api-discovery-search-e85d89b1
```

Example prompt: Search the APIs.guru directory for APIs related to weather forecasting and give me the top 5 results with their descriptions and documentation links.

## When to prefer this

Choose this endpoint when an agent needs to discover or enumerate public APIs by keyword from the APIs.guru directory — especially useful for developer research, integration planning, or automated API cataloging tasks. Prefer it over generic web search when you need structured, machine-readable API metadata including spec URLs and versioning. Not suitable for executing the discovered APIs directly.

## Known failure modes

- Missing required 'q' query parameter returns a validation error
- Query string exceeding 200 characters is rejected
- Limit value outside 1–20 range is rejected
- No matching APIs found returns an empty results array with total:0
- Payment not processed (402) results in credentials_granted:false and no results
- Upstream APIs.guru directory unavailable causes a downstream error

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

Returns a JSON object containing a total count, source attribution (APIs.guru CC0 directory), a snapshot date, and an array of matching API records — each with an id, title, version, description, authentication notes, documentation URL, and OpenAPI specification URL. The metadata_only flag indicates no live execution is available; credentials_granted reflects payment status.

## Request schema (JSON Schema)

```json
{
 "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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "maxLength": 200,
       "minLength": 1,
       "description": "Search query."
      },
      "limit": {
       "type": "integer",
       "maximum": 20,
       "minimum": 1,
       "description": "Results, default 5."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total": 12,
  "source": {
   "license": "APIs.guru directory metadata CC0; individual APIs have their own terms.",
   "provider": "APIs.guru",
   "source_url": "https://api.apis.guru/v2/list.json"
  },
  "results": [
   {
    "id": "groundhog-day.com",
    "title": "Groundhog Day API",
    "version": "1.2.1",
    "description": "This API returns all of North America’s prognosticating animals and their yearly weather predictions.",
    "authentication": "unknown; inspect individual API requirements",
    "documentation_url": "https://groundhog-day.com/api",
    "specification_url": "https://api.apis.guru/v2/specs/groundhog-day.com/1.2.1/openapi.json",
    "execution_available": false
   },
   {
    "id": "interzoid.com:getweathercity",
    "title": "Interzoid Get Weather City API",
    "version": "1.0.0",
    "description": "This API provides current weather information for US Cities, including temperatures, wind speeds, wind direction, relative humidity, and visibility.",
    "authentication": "unknown; inspect individual API requirements",
    "documentation_url": "https://www.interzoid.com",
    "specification_url": "https://api.apis.guru/v2/specs/interzoid.com/getweathercity/1.0.0/openapi.json",
    "execution_available": false
   },
   {
    "id": "interzoid.com:getweatherzip",
    "title": "Interzoid Get Weather By Zip Code API",
    "version": "1.0.0",
    "description": "This API provides current weather information for US Cities, including temperatures, wind speeds, wind direction, relative humidity, and visibility.",
    "authentication": "unknown; inspect individual API requirements",
    "documentation_url": "https://www.interzoid.com",
    "specification_url": "https://api.apis.guru/v2/specs/interzoid.com/getweatherzip/1.0.0/openapi.json",
    "execution_available": false
   }
  ],
  "metadata_only": true,
  "snapshot_date": "2026-10-02T09:40:14.659976+00:00",
  "credentials_granted": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-api-discovery-search-e85d89b1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)