# Agent Payment Metadata Exposure and Privacy Routing Decision Procedure

> Agent Payment Metadata Exposure and Privacy Routing Decision 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 privacy exposure grade and routing verdict for each payment rail, telling an agent whether to pay directly, via session channel, segmented wallet, or escalate to a principal based on what the payment graph reveals.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-payment-metadata-privacy-and-exposure-deci
- 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/agent-payment-metadata-exposure-and-privacy-routing-decision-procedure-e54dbc82
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mBliIPyKB4L0K3ohiCsAj

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 agent-payment-metadata-exposure-and-privacy-routing-decision-procedure-e54dbc82
```

Example prompt: I need to know how much payment metadata my agent leaks when it pays — can you score each rail like x402 Base direct, MPP session channels, and stealth, then tell me whether to route direct, use a session channel, or segment wallets to protect my identity?

## When to prefer this

Choose this endpoint when an AI agent needs a structured, scored decision about payment privacy across multiple rails before executing a transaction — especially when protecting principal identity, avoiding wallet clustering, or assessing cadence fingerprinting risk on Base or other x402-compatible rails. Prefer this over general privacy advisories when you need a machine-readable routing verdict with explicit kill criteria.

## Known failure modes

- Missing or invalid 'type' or 'method' fields in input returns a schema validation error
- Payment not received results in a 402 response requiring 0.002 USDC before content is returned
- Invalid topic override may return a generic default procedure rather than a tailored one
- LLM-generated briefs may be non-deterministic if generationSource is 'llm' rather than 'deterministic'
- Service may return ok:false with a handler error if the backend reasoning engine fails

## How this service works

Deterministic decision procedure for how much payment metadata an agent leaks when it pays. Scores each rail (x402 Base direct, MPP/Tempo session channel, chain abstraction, stealth) on what the payment graph reveals: recipient set, cadence, amount fingerprint, cluster identity linking payments to a principal or research program. Returns an exposure grade per rail, routing verdict (direct / session / segmented wallet / escalate-to-principal), and kill criteria: never reuse one wallet across

## Output

A structured response containing: an exposure grade per payment rail (x402 Base direct, MPP/Tempo session channel, chain abstraction, stealth), a routing verdict (direct / session / segmented wallet / escalate-to-principal), kill criteria for wallet reuse, and a prose decision brief explaining the reasoning. Also includes generation metadata (timestamp, source, model used).

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-payment-metadata-exposure-and-privacy-routing-decision-procedure-e54dbc82/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)