# SignalDesk AI – Pick Keys

> SignalDesk AI – Pick Keys is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Extracts a specified subset of keys from a JSON object, returning only the requested key-value pairs

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/json/pick-keys?utm_source=zero.xyz
- Price: $0.001/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-pick-keys-af504704
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gPPTwB-lqja8h-ZRFnDOk

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-pick-keys-af504704 -d '<json body>'
```

Example prompt: From this JSON object {"name":"Alice","age":30,"email":"alice@example.com","role":"admin","createdAt":"2024-01-01"}, pick only the keys "name" and "email" and return just those fields.

## When to prefer this

Use this endpoint when you need a simple, cheap, programmatic way to project a known set of keys out of a JSON object without writing custom code. Ideal for agent pipelines that receive large JSON payloads and need to pass only specific fields downstream. Prefer this over general-purpose code execution tools when you just need key selection and want a fast, bounded, pay-per-use micro-operation.

## Known failure modes

- Requested keys not present in the input object — those keys are silently omitted from the output
- Input 'data' is not a valid JSON object — may return an error or empty result
- Keys array exceeds 100 items (maxItems limit) — request rejected
- Key strings exceed 128 characters (maxLength limit) — request rejected
- Malformed request body — HTTP error response

## 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

A JSON object containing only the key-value pairs from the input object whose keys were listed in the requested keys array. Keys not present in the input object are omitted from the result.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "JSON object."
  },
  "keys": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 128,
    "description": "Key."
   },
   "maxItems": 100,
   "minItems": 0,
   "description": "Object key names."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "a": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-pick-keys-af504704/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)