# FiatDock Marketplace: Multi-Chain Gas Tracker

> FiatDock Marketplace: Multi-Chain Gas Tracker is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.00099/call, status unknown (last checked 2026-09-15).

Returns real-time gas price data across multiple blockchain networks, billed per call at $0.001 USDC via x402 protocol

## Facts

- Endpoint: POST https://fiatdock.com/s/svc_c815b4e9-36bd-4cdc-8eee-1be968cde5c2
- Price: $0.00099/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fiatdock-marketplace-multi-chain-gas-tracker-9a761ead
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l3cMzjBEDHIpVkE5cb5QL

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 fiatdock-marketplace-multi-chain-gas-tracker-9a761ead -d '<json body>'
```

Example prompt: What are the current gas prices on Ethereum, Polygon, and Base right now? I want to pick the cheapest network before sending my transaction.

## When to prefer this

Choose this endpoint when you need live, per-call gas price data across multiple blockchain networks without committing to a subscription. It is ideal for AI agents that need occasional gas checks billed at $0.001 USDC per call via the x402 protocol, and for workflows that span multiple chains and need a single unified interface via MCP JSON-RPC.

## Known failure modes

- Unsupported chain returns an error or empty result
- Malformed JSON-RPC body causes a parse error or 400 response
- Network congestion or upstream provider outage returns a timeout or 503
- Missing or invalid x402 payment header results in a 402 Payment Required response
- Incorrect tool name in params causes a method-not-found error

## How this service works

Pay-per-call: Multi-Chain Gas Tracker

## Output

Returns real-time gas price data for one or more blockchain networks, including current gas prices (e.g. in gwei), estimated transaction costs, and network identifiers — delivered as a JSON-RPC 2.0 response forwarded from the underlying MCP tool.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string",
   "description": "e.g. tools/call"
  },
  "params": {
   "type": "object",
   "description": "the seller's own tool name + arguments"
  },
  "jsonrpc": {
   "type": "string",
   "description": "\"2.0\" — the body is forwarded VERBATIM to the seller's MCP endpoint, so send whatever that server expects"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fiatdock-marketplace-multi-chain-gas-tracker-9a761ead/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fiatdock.com](https://www.zero.xyz/host/fiatdock.com/llms.txt)