# Agent Gas Station GasBuffer

> Agent Gas Station GasBuffer is a paid API for AI agents from agent-gas-station.agent-gas-station.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Returns a gas cost estimate for a given number of transactions on a chain, calculated as cached gas quote multiplied by tx_count with a 20% safety cushion added.

## Facts

- Endpoint: POST https://agent-gas-station.agent-gas-station.workers.dev/v1/GasBuffer?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-gas-station-gasbuffer-4e3fc917
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dc6Q3-jKFpfVGY0RkBseg

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-gas-station-gasbuffer-4e3fc917 -d '<json body>'
```

Example prompt: What's the buffered gas estimate for 5 transactions on the Base chain, including the 20% safety cushion?

## When to prefer this

Use this endpoint when an agent needs a quick, pre-validated gas budget estimate before submitting a batch of transactions — especially when you want a cached (fast) quote with a built-in safety margin rather than a real-time precise quote. Ideal for agentic workflows that need to pre-fund a wallet or gate execution on available gas.

## Known failure modes

- Unsupported or invalid chain identifier returns an error or empty result
- Stale cached gas quote may not reflect current network congestion
- Non-numeric or missing tx_count causes a validation error
- Network timeout if the upstream gas oracle is unavailable

## How this service works

Cached gas quote times tx_count, plus a 20% cushion.

## Output

A computed gas cost figure equal to the cached gas quote for the specified chain multiplied by the requested transaction count, then increased by 20% as a safety buffer. This gives the agent a conservative gas budget to use when planning or funding on-chain operations.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "type": "string"
  },
  "tx_count": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-gas-station-gasbuffer-4e3fc917/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-gas-station.agent-gas-station.workers.dev](https://www.zero.xyz/host/agent-gas-station.agent-gas-station.workers.dev/llms.txt)