# Session-Level Multi-Gate Paywall Spend Control for Browser Agents

> Session-Level Multi-Gate Paywall Spend Control for Browser Agents is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).

Returns a decision procedure for browser agents managing x402 paywall gates within a single session, covering deduplication, cumulative spend budgeting, pay-vs-skip ranking, and receipt binding.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/session-level-multi-gate-paywall-spend-control-f
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/session-level-multi-gate-paywall-spend-control-for-browser-agents-530f492c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HeJqzT-2kvmgRAbYDyJaQ

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 session-level-multi-gate-paywall-spend-control-for-browser-agents-530f492c
```

Example prompt: I need a decision procedure for handling multiple x402 paywall gates in one browsing session — explain how to deduplicate gates I've already paid for, enforce a per-session spending budget with a hard stop, rank competing gates by priority when budget is tight, and bind receipts to content so I don't pay twice.

## When to prefer this

Use this endpoint when building or configuring a browser agent that must navigate multiple distinct x402 payment gates within a single session and needs structured guidance on budget enforcement, deduplication, and receipt reuse. Prefer over generic x402 documentation when you need a concrete, agent-executable decision procedure rather than general protocol information.

## Known failure modes

- Payment not provided — returns 402 requiring USDC payment before content is unlocked
- Invalid or missing method parameter — returns validation error
- Session budget logic edge cases not covered by brief if topic is too niche
- LLM generation failure — result may indicate generation source as deterministic fallback
- Receipt verification logic may not cover all gate implementation variants

## How this service works

Paid agent-facing brief on Session-level multi-gate paywall spend control for browser agents: a decision procedure for an agent that crosses several distinct x402 gates (article body, image, PDF, embedded API) within one browsing session, covering gate deduplication to prevent paying twice for the same content, per-session cumulative spend budget with a hard stop, pay-vs-skip ranking when multiple gates compete for the same budget, and receipt-to-content binding so a second gate for

## Output

A structured brief containing prose decision procedures covering: gate deduplication logic, per-session cumulative spend tracking with hard stop rules, pay-vs-skip ranking algorithms for competing gates, and receipt-to-content binding verification. Includes metadata like topic, model, generation source, and ISO-8601 timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Session-level multi-gate paywall spend control for browser agents: a d paid response",
     "$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)
```

## 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": "session-level-multi-gate-paywall-spend-control-f",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "session-level-multi-gate-paywall-spend-control-f",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/session-level-multi-gate-paywall-spend-control-for-browser-agents-530f492c/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)