# In-Page Payment Request Vetting Decision Procedure for Browser Agents

> In-Page Payment Request Vetting Decision Procedure for Browser 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 2026-09-15).

Returns an allow/deny decision procedure for AI agents that encounter payment requests mid-task while browsing, covering provenance, merchant identity, price sanity, machine-readable terms, and wallet scope checks.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-facing-decision-procedure-for-in-page-paym
- 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/in-page-payment-request-vetting-decision-procedure-for-browser-agents-800ba02c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hi52rHR4xwagNBIqTz1S4

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 in-page-payment-request-vetting-decision-procedure-for-browser-agents-800ba02c
```

Example prompt: My browser agent just hit a page mid-task that's asking to charge 0.002 USDC via an iframe widget — can you run the in-page payment vetting procedure to decide whether it should allow or deny that payment, checking the merchant identity, provenance, and whether it's within budget?

## When to prefer this

Choose this endpoint when your agent is browsing the web with wallet access and needs a structured, security-aware decision framework before approving any in-page, iframe, redirect, or widget-triggered payment. Prefer it over generic payment approval logic when you need explicit coverage of phishing mirrors, iframe injection, and redirect-loop attack patterns specific to the x402/Browser Use agentic context.

## Known failure modes

- Payment required (402) if no USDC payment of 0.002 is provided
- Topic override ignored if query param malformed
- LLM generation failure returning partial or empty procedure text
- Timeout if underlying reasoning model is slow
- Stale or cached procedure if generatedAt timestamp is old

## How this service works

Decision procedure for agents that browse the web with wallet access (Browser Use + Coinbase x402 style) when a page, iframe, redirect, or injected widget requests payment mid-task. Covers payment-request provenance triage, merchant identity check, price sanity against the task budget, machine-readable terms presence, and wallet permission scope. Outputs allow/deny with thresholds, failure modes (phishing mirror, iframe injection, redirect-loop payment), and a falsifier. Pay 0.002 USDC on Base

## Output

A decision procedure brief in prose form, including an allow or deny recommendation with thresholds, coverage of payment-request provenance triage, merchant identity check outcome, price sanity evaluation against task budget, machine-readable terms presence check, wallet permission scope assessment, identified failure modes (phishing mirror, iframe injection, redirect-loop payment), and a falsifier. Response includes ok/paid status, the procedure text, generation source (llm/reasoning/deterministic), and an ISO-8601 timestamp.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/in-page-payment-request-vetting-decision-procedure-for-browser-agents-800ba02c/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)