# K-2SO Agent Decision Procedure for Pre-Signature EVM Transaction Simulation

> K-2SO Agent Decision Procedure for Pre-Signature EVM Transaction Simulation is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Returns a paid LLM-generated decision procedure brief guiding an AI agent on how to evaluate and decide whether to sign an EVM transaction before execution

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/agent-facing-decision-procedure-for-pre-signatur
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/k-2so-agent-decision-procedure-for-pre-signature-evm-transaction-2f885408
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yQWF3FX-icxajRXLjZkr9

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 k-2so-agent-decision-procedure-for-pre-signature-evm-transaction-2f885408
```

Example prompt: Give me a decision procedure brief I can use to decide whether to sign an EVM transaction before execution — walk me through the checks and logic an autonomous agent should apply.

## When to prefer this

Choose this endpoint when an autonomous AI agent needs a structured, prose-format decision framework for evaluating EVM transactions before signing, particularly in x402 micropayment-native agent architectures where per-call USDC billing is acceptable. Prefer this over static rule sets when you want an LLM-generated, contextually reasoned procedure that can be topic-overridden for specific transaction types.

## Known failure modes

- HTTP 402 returned if payment not settled — agent must pay exact USDC amount and retry with PAYMENT-SIGNATURE header
- Invalid or missing method type causes schema validation failure
- Topic override may produce off-topic or low-quality brief if the string is ambiguous
- Service may return generationSource=deterministic if LLM is unavailable, potentially lower quality
- Network or provider downtime at k2so.wrong.systems results in connection errors

## How this service works

Paid agent-facing brief on Agent-facing decision procedure for pre-signature EVM transaction simulation: when an autonomous agent must simulate a transaction before signing/settling it, which simulator to use per chain and context, revert-risk classification, approval and slippage checks inside the simulation, and what to do when a simulation reverts or is unavailable.. Blunt decision procedure, not marketing.

## Output

A JSON object containing a plain-prose decision procedure brief (120+ words) tailored to pre-signature EVM transaction simulation, including the model used, generation source (llm/reasoning/deterministic), topic, service slug, ISO-8601 generation timestamp, and payment confirmation metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Agent-facing decision procedure for pre-signature EVM transaction simu paid response",
     "$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/k-2so-agent-decision-procedure-for-pre-signature-evm-transaction-2f885408/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)