# Synapse API — Boba Network Gas Estimator

> Synapse API — Boba Network 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 2026-09-13).

Estimates gas cost for a transaction on the Boba Network blockchain

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/boba/gas/estimate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-boba-network-gas-estimator-b0d842cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VDTuDOCN_3OdFwObDROW5

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-boba-network-gas-estimator-b0d842cb -d '<json body>'
```

Example prompt: Estimate the gas needed to send a transaction on Boba Network from 0xABC...123 to 0xDEF...456 with value 0.5 ETH and no extra calldata.

## When to prefer this

Use this endpoint when you need to estimate gas costs specifically for Boba Network (an Ethereum L2/optimistic rollup) transactions before submitting them. Prefer this over generic Ethereum gas estimators when your transaction targets Boba Network, and over full transaction submission endpoints when you only want a cost preview without side effects.

## Known failure modes

- Invalid or malformed address in 'to' or 'from' fields returns an error
- Malformed or non-hex 'data' field may cause parsing failure
- Transaction that would revert on-chain may return a simulation error rather than a gas estimate
- Missing required fields may result in a 400 bad request
- Network unavailability or Boba RPC issues may cause timeout or 503 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 a gas estimate (in gas units) for the described transaction on the Boba Network, allowing the caller to budget fees before submitting the actual transaction on-chain.

## 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-boba-network-gas-estimator-b0d842cb/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)