# Age-Verification Handoff Decision Procedure for Agents

> Age-Verification Handoff Decision Procedure for Agents 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 2026-10-20).

Returns a structured decision procedure guiding an AI agent through age verification classification, proof method selection, and refusal/fallback policy when gating age-restricted content or transactions.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/age-verification-handoff-procedure-for-agents-se?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/age-verification-handoff-decision-procedure-for-agents-c64d503b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_64b9a4GA8nuB1NYRIq5SS

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 age-verification-handoff-decision-procedure-for-agents-c64d503b
```

Example prompt: Walk me through the full age-verification decision procedure I should follow before serving adult-only content — I need to know how to classify the interaction, which proof method to use given privacy constraints, and what to do if the user fails verification or I can't confirm their age.

## When to prefer this

Choose this endpoint when an AI agent needs an authoritative, structured decision procedure for age verification at runtime — particularly when the agent must determine proof method by privacy budget, handle jurisdiction variance, and implement compliant fallback/refusal routing. Prefer over generic compliance lookups when you need agent-executable prose that covers classification, proof selection, retry policy, and evidence retention in a single call.

## Known failure modes

- Payment not provided — endpoint returns 402 requiring x402 USDC payment before procedure is delivered
- Invalid or missing required 'input' object — returns schema validation error
- Topic override not recognized or too vague — procedure may default to generic age-verification guidance
- LLM generation failure — generationSource may fall back to deterministic or reasoning mode with reduced detail
- Service temporarily unavailable on ascii.dev infrastructure — returns 5xx error

## How this service works

Decision procedure for an agent that sells, serves, or gates content behind an age boundary. Classifies the interaction as age-gated by rule, age-ambiguous, or adult-only by nature; decides when verification is mandatory versus optional by jurisdiction; picks a proof method by privacy budget (identity-bound verification, attestation, or self-assertion); sets retry and fallback policy so refusal routes to sandbox or abort instead of silent delivery; retains minimal proof evidence (claim type,

## Output

A prose decision procedure brief tailored for AI agents, covering: (1) classification of the interaction as age-gated by rule, age-ambiguous, or adult-only by nature; (2) jurisdiction-based determination of when verification is mandatory vs optional; (3) recommended proof method selected by privacy budget (identity-bound, attestation, or self-assertion); (4) retry and fallback policy routing failures to sandbox or abort; (5) minimal evidence retention specification (claim type and timestamp). Also returns service slug, generation source, and ISO-8601 timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Age-verification handoff procedure for agents selling or serving content to unve paid response",
     "$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/age-verification-handoff-decision-procedure-for-agents-c64d503b/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)