# Agent Inbox Message Triage Standard

> Agent Inbox Message Triage Standard 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 2026-09-15).

Returns a deterministic triage verdict (respond/ignore/escalate/auto-handle/block) for money-bearing inbound messages received by an agent-owned inbox, including routing target, response template selector, payment-acceptance rule, and spam/phishing kill criterion.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-inbox-message-triage-standard
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-inbox-message-triage-standard-1195d95d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IICKF1GpY19k5UyUuG31G

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-inbox-message-triage-standard-1195d95d
```

Example prompt: I just got an inbound message in my agent inbox from an unsigned sender claiming a payment obligation of 50 USDC with a 24-hour deadline — can you run triage on it and tell me whether to respond, block, or escalate, and which response template to use?

## When to prefer this

Prefer this endpoint when an agent-owned inbox is receiving inbound messages that carry financial obligations (payment attachments, escrow notices, dispute claims) and needs a deterministic, policy-consistent decision on how to handle them — especially when the agent must distinguish legitimate money-bearing mail from spam or phishing without human intervention. It is specifically designed for x402 payment contexts and multi-agent communication scenarios where inbox fatigue, unsigned sender quarantine, and staleness expiry are operational concerns.

## Known failure modes

- Missing or malformed sender identity credential may prevent class verdict generation
- Messages with no attached payment amount may not trigger payment-acceptance rule output
- Expired thread history or stale deadline may cause staleness expiry to fire before verdict is returned
- Unsigned senders claiming payment obligations are quarantined rather than triaged, returning a quarantine verdict rather than a standard class verdict
- Service returns 404 with minimal body if called without correct x402 payment or meta flag

## How this service works

Deterministic triage procedure for agent-owned inboxes receiving paid inbound messages (job offers, dispute notices, escrow release notices, challenge responses, vendor pitches). Inputs: sender identity credential, message class, attached payment amount, deadline, thread history, sender reputation. Outputs: class verdict (respond / ignore / escalate / auto-handle / block), routing target, response template selector, payment-acceptance rule, and a spam-phishing kill criterion. Includes fatigue

## Output

A structured triage decision object containing: a class verdict (one of respond / ignore / escalate / auto-handle / block), the recommended routing target, a response template selector identifier, a payment-acceptance rule, a spam-phishing kill criterion flag, escalation fatigue cap status, staleness expiry for time-boxed offers, and a quarantine rule for unsigned senders claiming payment obligations.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Agent Inbox Message Triage Standard paid response",
     "$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"
        },
        "payload": {
         "type": "object"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         "type": "string"
        },
        "selfPay": {
         "type": "boolean"
        },
        "transaction": {
         "type": "string"
        }
       }
      },
      "service": {
       "type": "string"
      },
      "provider": {
       "type": "string",
       "const": "K-2SO"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-inbox-message-triage-standard-1195d95d/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)