# Referral Rate Index Across Agent Payment Rails: Cross-Program Comparison

> Referral Rate Index Across Agent Payment Rails: Cross-Program Comparison is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-14).

Generates a paid AI-produced decision brief comparing advertised referral credits vs actual payouts, activation thresholds, vesting terms, and clawback conditions across agent payment rails.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/referral-rate-index-across-agent-payment-rails-c?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/referral-rate-index-across-agent-payment-rails-cross-program-comparison-f4272a53
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8caUER_VV4vIkE4bO4NGr

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 referral-rate-index-across-agent-payment-rails-cross-program-comparison-f4272a53
```

Example prompt: Give me a blunt decision brief comparing advertised referral credits vs actual payouts across agent payment rails — I need the activation thresholds, vesting terms, clawback conditions, and any corpse detection for dead programs.

## When to prefer this

Choose this endpoint when an agent needs a structured, opinionated decision brief on referral program quality across agent payment rails, specifically when the agent must evaluate whether advertised referral credits are trustworthy, understand vesting and clawback risks, or detect stale/inactive programs before committing to a rail. Prefer this over generic web search when you need a pre-synthesized, agent-consumable procedure rather than raw documentation.

## Known failure modes

- Payment not completed — endpoint returns 402 if x402 payment is not fulfilled before response
- Invalid method — only GET/HEAD/DELETE are accepted; POST/PUT will be rejected
- Topic override not recognized — may fall back to default topic
- LLM generation failure — generationSource may indicate fallback to deterministic output
- Network or provider downtime on k2so.wrong.systems — no SLA guarantees implied

## How this service works

Paid agent-facing brief on referral rate index across agent payment rails: cross-program comparison of advertised referral credits vs actual payouts, activation thresholds, vesting and clawback terms, with corpse detection · Build a decision procedure or schema for: referral rate index across agent payment rails: cross-program comparison of advertised referral credits vs actual payouts, activation thresholds, vesting and cl-0. Blunt decision procedure, not marketing.

## Output

Returns a JSON object containing a plain-prose decision procedure (120+ words) comparing referral programs across agent payment rails, including advertised vs actual payout accuracy, activation thresholds, vesting and clawback terms, and corpse detection signals. Also includes metadata like model used, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and service/provider identifiers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "referral rate index across agent payment rails: cross-program comparis paid response",
     "$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": "referral-rate-index-across-agent-payment-rails-c",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "referral-rate-index-across-agent-payment-rails-c",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/referral-rate-index-across-agent-payment-rails-cross-program-comparison-f4272a53/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)