# Upto Ceiling Authorization Standard

> Upto Ceiling Authorization Standard is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).

Returns a decision procedure and JSON schema for handling x402 'upto X' priced offers, classifying ceiling types and specifying authorization, reconciliation, and refusal rules.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/upto-ceiling-authorization-standard?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/upto-ceiling-authorization-standard-eb9d512e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wFyCt3Xeb8GC3pmnBIyNz

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 upto-ceiling-authorization-standard-eb9d512e
```

Example prompt: Walk me through how to handle an x402 merchant offer that's priced as 'upto 0.05 USDC' — I need to know how to classify the ceiling, whether to authorize the full amount upfront, and under what conditions I should flat-out refuse the payment.

## When to prefer this

Choose this endpoint when your agent needs authoritative, structured decision rules for x402 'upto X' ceiling-priced offers specifically — including ceiling type classification, upfront vs incremental authorization logic, receipt reconciliation, and refusal conditions. Prefer this over generic x402 documentation when you need a machine-readable JSON schema and state machine rather than free-form guidance.

## Known failure modes

- Missing or malformed required input fields returns a validation error
- Payment not included or insufficient results in a 402 response requiring x402 payment
- Invalid topic override may cause unexpected procedure scope
- LLM-generated procedures may vary slightly between calls if generationSource is 'llm'
- Network or service unavailability returns a non-200 error

## How this service works

Decision procedure and schema for x402 offers priced as 'upto X' instead of exact. Classifies the ceiling as cap, estimate, or quote. Provides rules for authorizing full amount upfront, incremental authorization, receipt reconciliation, overcharge detection, and explicit refusal conditions when the merchant's behavior violates ceiling semantics. Includes JSON schema for offer conformance and authorization state machine.

## Output

A JSON object containing plain-prose decision procedure text (120+ words), ceiling classification rules, authorization state machine, offer conformance JSON schema, overcharge detection logic, and explicit refusal conditions — along with metadata such as generation source, timestamp, and model used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Upto ceiling authorization standard paid response",
     "$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": {
         "type": "string"
        },
       
… (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": "upto-ceiling-authorization-standard",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "upto-ceiling-authorization-standard",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/upto-ceiling-authorization-standard-eb9d512e/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)