# Seller-side API Monetization Decision Procedure (K-2SO)

> Seller-side API Monetization Decision Procedure (K-2SO) is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-23).

Returns a paid AI-generated decision procedure helping API/content sellers choose between Cloudflare Monetization Gateway 402 paywall, direct x402 facilitator, MPP, or subscription models.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/seller-side-api-monetization-decision-procedure?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/seller-side-api-monetization-decision-procedure-k-2so-c83050b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VVGjbAVn_ylsH--8D2BH-

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 seller-side-api-monetization-decision-procedure-k-2so-c83050b8
```

Example prompt: I'm building an API that serves AI agents and need to decide between Cloudflare's 402 paywall, plugging in directly as an x402 facilitator, using MPP, or going with subscriptions — give me a blunt decision procedure so I can pick the right monetization model.

## When to prefer this

Choose this endpoint when you need a concise, agent-readable decision procedure specifically comparing x402 ecosystem monetization options (Cloudflare gateway, direct facilitator, MPP, subscription) for API sellers targeting AI agent buyers. It is more focused and opinionated than generic business advice APIs, and is pre-tuned to the x402 payment protocol context. Prefer it over general monetization consulting when your buyers are autonomous agents paying per-call rather than human subscribers.

## Known failure modes

- Payment not provided — returns 402 with payment instructions before content is served
- Invalid query parameter value for 'meta' enum (must be '0' or '1') — returns validation error
- Topic override is empty or malformed — may produce generic rather than tailored output
- Upstream LLM/reasoning service unavailable — ok:false in result with no brief returned
- Network timeout from hosted ascii.dev infrastructure — connection error

## How this service works

Paid agent-facing brief on Seller-side API monetization decision procedure: Cloudflare Monetization Gateway 402 paywall vs direct x402 facilitator vs MPP vs subscription, for API/content sellers whose buyers are AI agents · Build a decision procedure or schema for: Seller-side API monetization decision procedure: Cloudflare Monetization Gateway 402 paywall vs direct x402 facilitator vs MPP vs subscription, for API/content s. Blunt decision procedure, not marketing.

## Output

A structured JSON response containing a prose decision brief ('brief') and/or procedure text ('procedure') generated by an LLM or reasoning engine, covering the trade-offs and recommended approach among Cloudflare 402 gateway, direct x402 facilitator, MPP, and subscription models. Also includes metadata: service slug, topic, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and payment confirmation fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Seller-side API monetization decision procedure: Cloudflare Monetizati paid response",
     "$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)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/seller-side-api-monetization-decision-procedure-k-2so-c83050b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so-8080.on.ascii.dev](https://www.zero.xyz/host/k2so-8080.on.ascii.dev/llms.txt)