# Base Gas Snapshot

> Base Gas Snapshot is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.005/call, status down (last checked 2026-11-01).

Returns the live Base x402 transfer fee from the rail index as a point-in-time gas snapshot.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/base-gas-snapshot?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-gas-snapshot-2813b5e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_22RTFiVE9WfJ-z5Vmp_9E

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 base-gas-snapshot-2813b5e9
```

Example prompt: What's the current x402 transfer fee on the Base network right now? Grab the live gas snapshot from the rail index.

## When to prefer this

Choose this endpoint when an AI agent needs a real-time, point-in-time snapshot of the Base x402 transfer fee from the canonical rail index — particularly before routing a payment, auditing settlement costs, or deciding whether to transact on Base at the current fee level. Prefer this over generic gas estimation APIs when working specifically within the x402 payment protocol on Base.

## Known failure modes

- Payment required (402) if no x402 payment header is included and meta=1 is not set
- Invalid method (only GET, HEAD, DELETE accepted)
- Stale or unavailable rail index data leading to outdated fee snapshot
- Network timeout from k2so.wrong.systems
- Invalid queryParams value for meta field (must be '0' or '1')

## How this service works

Live Base x402 transfer fee from the rail index.

## Output

Returns a JSON object with an 'ok' boolean, payment confirmation, service slug, provider identifier, and a result object containing: handler success flag, a numeric score, service string, summary text, evidence object, strengths array, confidence level, ISO-8601 generatedAt timestamp, and risk factors array — representing the live x402 transfer fee snapshot for the Base network.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Base Gas Snapshot paid response",
     "$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"
        },
        "score": {
         "type": "number"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "summary": {
         "type": "string"
        },
        "evidence": {
         "type": "object"
        },
        "strengths": {
         "type": "array",
         "items": {
          "type": "string"
         }
        },
        "confidence": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "riskFactors": {
         "type": "array",
         "items": {
          "type": "string"
         }
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         "type": "string"
        },
        "selfPay": {
         "type": "boolean"
        },
        "transaction": {
         "type": "string"
        }
       }
     
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-gas-snapshot-2813b5e9/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)