# Script Master Labs Gas Tracker — x402 Data API

> Script Master Labs Gas Tracker — x402 Data API is a paid API for AI agents from mcp-x402.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns real-time gas price data for a specified blockchain network, paid per-call in USDC via x402 protocol.

## Facts

- Endpoint: GET https://mcp-x402.onrender.com/x402/gas-tracker
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/script-master-labs-gas-tracker-x402-data-api-10944949
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hYjq-QMYsE-otjPw724P0

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 script-master-labs-gas-tracker-x402-data-api-10944949
```

Example prompt: What are the current gas prices on Base right now? I want to time my transaction when fees are low.

## When to prefer this

Choose this endpoint when you need real-time gas fee data for EVM-compatible chains (especially Base) and are already operating in a Web3/x402 micropayment context. It is well-suited for agents that autonomously pay per call in USDC without requiring API key management. Prefer alternatives (e.g. Etherscan gas oracle, Blocknative) if you need detailed gas history, guaranteed SLAs, or structured response schemas.

## Known failure modes

- Missing or invalid 'chain' query parameter may return an error or default network data
- Unknown chain identifier returns an error or empty response
- Payment failure via x402 (insufficient USDC, wrong network) blocks the request entirely
- Service unavailable on Render free tier cold-start delays
- Rate limiting if many calls are made in rapid succession

## How this service works

Pay-per-call crypto, RWA, federal, SEC, Section 8/HUD housing, and compliance APIs via x402. Primary: USDC on Base (eip155:8453). Also accepts Global Dollar (USDG) on Robinhood Chain (eip155:4663) via sovereign X-PAYMENT-TX. Hyphen routes only (e.g. /x402/gas-tracker, /x402/pha-lookup, /x402/sec-8k). MARKETPLACE REVIEW: use free /x402/playground/* (no key, no payment). Production /x402/* returns 402 unless paid via x402 or X-Api-Market-Key / X-API-Key from seller dashboard.

## Output

Returns current gas tracker data for the requested blockchain network, including gas price levels (e.g. slow, standard, fast) and estimated transaction costs in native token units. Response format is unstructured (example: {}) so exact fields depend on the network queried.

## 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": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "chain": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "properties": {
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/script-master-labs-gas-tracker-x402-data-api-10944949/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-x402.onrender.com](https://www.zero.xyz/host/mcp-x402.onrender.com/llms.txt)