# Agent Onchain Settlement Cost Engineering Decision Procedure

> Agent Onchain Settlement Cost Engineering Decision Procedure 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 2026-09-13).

Returns a decision procedure brief for autonomous agents on how to optimize and bound onchain settlement costs for x402/MPP micropayments, including gas selection, batching, paymaster choice, and base fee forecasting.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-onchain-settlement-cost-engineering-decisi
- 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/agent-onchain-settlement-cost-engineering-decision-procedure-60801f6e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d9z5Z0Cs6EMmGC4jp9EZn

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-onchain-settlement-cost-engineering-decision-procedure-60801f6e
```

Example prompt: Walk me through the decision procedure for settling x402 micropayments onchain — specifically how to pick gas limits and priority fees, when to batch payments, whether to use ERC-4337 paymaster or native sponsorship, and how to forecast base fees to keep the total session cost bounded.

## When to prefer this

Choose this endpoint when an autonomous agent needs structured, actionable guidance for optimizing onchain settlement costs specifically for x402 or MPP micropayments on EVM chains. Prefer this over generic gas estimation APIs when the agent needs a holistic decision procedure covering batching, paymaster selection, and fee forecasting together, rather than a single gas price lookup.

## Known failure modes

- Payment required but not provided — returns 402 with payment details
- Invalid topic override format — may return default procedure
- Service temporarily unavailable — 5xx response
- Malformed request parameters — returns validation error
- LLM/reasoning generation failure — result may be missing 'brief' or 'procedure' fields

## How this service works

Decision procedure for an autonomous agent that must settle x402 or MPP micropayments onchain: select gas limits and priority fees, decide when to batch multiple micropayments into one transaction, choose between ERC-4337 paymaster and native sponsorship, forecast base fee across time windows, and bound total settlement cost for a spend session.

## Output

A structured decision procedure brief (prose and/or structured fields) covering: gas limit and priority fee selection logic, batching thresholds for micropayments, ERC-4337 paymaster vs native sponsorship selection criteria, base fee forecasting across time windows, and cost bounding strategies for a spend session. Includes metadata like generation source (llm/reasoning/deterministic), model used, topic, and ISO-8601 timestamp.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-onchain-settlement-cost-engineering-decision-procedure-60801f6e/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)