# Keyless x402 API Monetization Migration Procedure

> Keyless x402 API Monetization Migration Procedure 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 2026-09-13).

Returns a structured decision procedure for merchants converting an existing API-key or subscription-billed API to keyless HTTP 402 pay-per-call monetization.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/keyless-x402-api-monetization-migration
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/keyless-x402-api-monetization-migration-procedure-6fbdb91c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6gSwmA0XJ8JHn2iEVQ_8p

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 keyless-x402-api-monetization-migration-procedure-6fbdb91c
```

Example prompt: Walk me through the decision procedure for migrating my subscription-billed API to keyless x402 pay-per-call — I need to know which endpoints to convert first, how to wire the HTTP 402 flow, how to handle rate limiting without user identity, and how to run shadow mode with dual billing.

## When to prefer this

Choose this endpoint when a merchant or API developer needs step-by-step procedural guidance for migrating an existing API-key or subscription-billed API to the x402 HTTP pay-per-call protocol. Prefer it over generic x402 documentation when you need decision-tree-style ordered answers covering endpoint selection, 402 wiring, keyless rate limiting, pricing bounds, and shadow mode rollout in a single call.

## Known failure modes

- Missing or invalid 'type' or 'method' fields return a 400-level error
- No payment provided returns HTTP 402 PAYMENT-REQUIRED with payment details
- Unsupported HTTP method (e.g. POST, PUT) rejected by schema enum constraint
- Topic override field may yield off-topic or generic procedure if poorly specified
- LLM generation may occasionally produce incomplete or inconsistent guidance

## How this service works

Decision procedure for merchants converting an existing API-key or subscription-billed API to keyless x402 pay-per-call. Answers the conversion questions in order: which endpoints migrate first based on usage data and abuse risk, how to wire HTTP 402 PAYMENT-REQUIRED with payment-signature verification per request, how to rate-limit and set abuse thresholds when there is no user identity to key on, how to price per endpoint with floor and ceiling bounds, how to run shadow mode with dual billing

## Output

A structured prose decision procedure (and optional metadata JSON) covering: endpoint prioritization by usage and abuse risk, HTTP 402 PAYMENT-REQUIRED wiring with per-request payment-signature verification, keyless rate-limiting and abuse threshold strategies, per-endpoint pricing with floor/ceiling bounds, and shadow-mode dual-billing setup. Response includes service slug, generation source, ISO-8601 timestamp, and model used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Keyless x402 API monetization migration procedure paid response",
     "$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)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/keyless-x402-api-monetization-migration-procedure-6fbdb91c/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)