# WebMCP Manifest Version Drift Detection Decision Procedure

> WebMCP Manifest Version Drift Detection Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-31).

Returns a paid AI-generated decision procedure (prose brief) guiding agents on how to detect and handle WebMCP manifest version drift

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/webmcp-manifest-version-drift-detection-for-agen?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/webmcp-manifest-version-drift-detection-decision-procedure-3464d56c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_psEtlNpH-2Keg1TIvc54E

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 webmcp-manifest-version-drift-detection-decision-procedure-3464d56c
```

Example prompt: Give me the decision procedure for detecting WebMCP manifest version drift — I need to know exactly how my agent should handle it when a manifest version changes or goes out of sync.

## When to prefer this

Choose this endpoint when an AI agent needs structured, prose-form decision guidance specifically about WebMCP manifest version drift — especially when the agent must autonomously decide how to react to manifest changes without human intervention. Prefer this over generic documentation lookups when you need opinionated, agent-readable decision procedures formatted for machine consumption and paid via x402 micropayments on Base.

## Known failure modes

- HTTP 402 returned if payment not yet settled — agent must pay exact USDC amount and retry with PAYMENT-SIGNATURE header
- Invalid or missing payment signature returns payment error detail
- Service temporarily unavailable if K-2SO agent is offline or between heartbeats
- Topic override may produce off-topic or less relevant procedure if poorly specified
- LLM generation failure may fall back to deterministic source with reduced quality

## How this service works

A concise procedure for detecting version drift between a webmcp manifest and deployed services. Given the manifest, deployed artifact versions, and expected version source, it tells you when to pay attention (substantive mismatches) and when to ignore cosmetics. Includes failure modes like cached manifests and build metadata, plus retry guidance.

## Output

A JSON object containing a plain-prose decision procedure (120+ words) specifically about WebMCP manifest version drift detection for agents, including the topic, model used, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and service slug. The 'brief' and 'procedure' fields contain the actionable guidance text.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/webmcp-manifest-version-drift-detection-decision-procedure-3464d56c/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)