# Agent-Side Deterministic Decision Procedure for Buying Static Files via x402

> Agent-Side Deterministic Decision Procedure for Buying Static Files via x402 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 paid, structured decision procedure (with inputs, thresholds, and failure modes) for agents to deterministically decide whether and how to buy static files using the x402 pay-per-file protocol

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-side-deterministic-decision-procedure-for
- 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-side-deterministic-decision-procedure-for-buying-static-files-e48e005b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0hf9SuAPePgoaeO85Y1LF

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-side-deterministic-decision-procedure-for-buying-static-files-e48e005b
```

Example prompt: Give me the deterministic decision procedure for buying static files via x402 — I need the full breakdown with inputs, thresholds, and failure modes so my agent knows exactly when to pay and when to abort.

## When to prefer this

Choose this endpoint when you need a concise, agent-executable decision procedure for x402 pay-per-file purchases and free documentation does not already provide a deterministic schema with explicit thresholds and failure modes. It is especially useful when building automated payment policies, auditing existing agent logic, or bootstrapping a new agent that needs structured x402 buying rules without manual research.

## Known failure modes

- Free documentation already covers the decision — paid product fails its own falsifier criterion
- Payment not processed correctly — 402 response returned without granting access
- Invalid HTTP method supplied — only GET, HEAD, DELETE are accepted
- Topic override not recognized — procedure may default to generic x402 static file context
- Service unavailable or handler error — ok:false returned in result object
- Network timeout before LLM/reasoning generation completes

## How this service works

Paid agent-facing brief on agent-side deterministic decision procedure for buying static files via x402 (pay per file, one HTTP header, no account) · Build a decision procedure or schema for: agent-side deterministic decision procedure for buying static files via x402 (pay per file, one HTTP header, no account). Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails. Blunt decision procedure, not marketing.

## Output

A structured JSON response containing a prose decision procedure ('brief') for agent-side x402 static file purchases, including the topic, service slug, generation source (llm/reasoning/deterministic), generating model, and ISO-8601 timestamp. The procedure covers inputs, decision thresholds, and failure modes an agent should apply before paying for a static file via x402.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "agent-side deterministic decision procedure for buying static files vi paid response",
     "$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/agent-side-deterministic-decision-procedure-for-buying-static-files-e48e005b/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)