# Synapse API — Hyperliquid Gas Estimator

> Synapse API — Hyperliquid Gas Estimator is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Estimates gas costs for a transaction on the Hyperliquid network by simulating a call with sender, recipient, data, and value inputs.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/hyperliquid/gas/estimate?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-hyperliquid-gas-estimator-ebec0538
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FvhdNlB4yY3zYH6ZkY99R

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 synapse-api-hyperliquid-gas-estimator-ebec0538 -d '<json body>'
```

Example prompt: Estimate the gas cost for a Hyperliquid transaction where I'm sending from 0xAbC123... to 0xDeF456... with calldata 0x1234abcd and value 0.5 ETH.

## When to prefer this

Use this endpoint when you need to estimate transaction gas costs on the Hyperliquid network specifically before committing to a transaction. Prefer this over generic Ethereum gas estimators when targeting Hyperliquid's L1/L2 environment, as gas parameters may differ from mainnet Ethereum.

## Known failure modes

- Invalid or malformed Ethereum address for 'to' or 'from' fields returns a 400 error
- Malformed or non-hex 'data' field may cause estimation failure
- Hyperliquid RPC node unavailable returns 5xx error
- Transaction simulation reverts (e.g. insufficient balance or bad calldata) may return an error or revert reason
- Missing required fields may cause incomplete estimation or error response

## How this service works

High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.

## Output

Returns an estimated gas amount (in gas units) required to execute the described transaction on the Hyperliquid network, based on simulation without on-chain submission.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "to": {
   "type": "string"
  },
  "data": {
   "type": "string"
  },
  "from": {
   "type": "string"
  },
  "value": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-hyperliquid-gas-estimator-ebec0538/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)