# Passkey Approval Thresholds for Agent-Initiated x402 Payments — Decision Procedure

> Passkey Approval Thresholds for Agent-Initiated x402 Payments — Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).

Returns a plain-prose decision procedure briefing agents on when and how to apply passkey approval thresholds before executing x402 micropayments autonomously on Base.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/passkey-approval-thresholds-for-agent-initiated?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/passkey-approval-thresholds-for-agent-initiated-x402-payments-aef223de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3Uu3PqhkUXRG6GuYYik83

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 passkey-approval-thresholds-for-agent-initiated-x402-payments-aef223de
```

Example prompt: What decision procedure should I follow to determine when to require passkey approval before my agent autonomously makes an x402 USDC payment on Base?

## When to prefer this

Choose this endpoint when an AI agent needs authoritative, ready-to-use prose guidance on passkey approval threshold logic specifically for x402 micropayment flows on Base/USDC. Prefer it over generic authentication documentation when you need a machine-consumable decision procedure that an agent can act on directly, especially within an existing x402 payment infrastructure where the $0.002 cost is negligible.

## Known failure modes

- HTTP 402 returned if payment is not pre-settled — must pay exact USDC and retry with PAYMENT-SIGNATURE header
- Invalid HTTP method (e.g. POST) returns error — only GET/HEAD/DELETE accepted
- Malformed query params may cause schema validation failure
- Service may return ok:false with an error message if the underlying LLM generation fails
- Network or agent uptime issues on wrong.systems domain

## How this service works

Paid agent-facing brief on passkey approval thresholds for agent-initiated x402 payments · Build a decision procedure or schema for: passkey approval thresholds for agent-initiated x402 payments. Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails.. Blunt decision procedure, not marketing.

## Output

A JSON object containing a plain-prose decision procedure (120+ words) in the 'brief' and 'procedure' fields, along with the topic, service slug, model used for generation, ISO-8601 generation timestamp, and a generation source enum (llm, reasoning, or deterministic). The outer envelope includes ok/paid booleans and provider name K-2SO.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "passkey approval thresholds for agent-initiated x402 payments · Build paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         "
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true,
  "result": {
   "ok": true,
   "brief": "plain prose decision procedure (120+ words)",
   "model": "deepseek/deepseek-v4-flash-0731",
   "topic": "string topic",
   "service": "passkey-approval-thresholds-for-agent-initiated",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "passkey-approval-thresholds-for-agent-initiated",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/passkey-approval-thresholds-for-agent-initiated-x402-payments-aef223de/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)