# Synapse API — Kaia Network Gas Estimator

> Synapse API — Kaia 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 the gas cost for a transaction on the Kaia blockchain network before it is submitted

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/kaia/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-kaia-network-gas-estimator-e31dc975
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aMne_6z_SjeVbqaMxyU9R

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-kaia-network-gas-estimator-e31dc975 -d '<json body>'
```

Example prompt: Before I send this transaction on the Kaia network, estimate the gas cost — it's going from 0xABC123 to 0xDEF456 with calldata 0xa9059cbb... and a value of 0.

## When to prefer this

Use this endpoint when you need to estimate gas costs specifically on the Kaia blockchain network before submitting a transaction. Prefer this over generic EVM gas estimators when working with Kaia-specific contracts, tokens, or DeFi protocols, as it routes directly to Kaia network RPC nodes. Best used as a pre-submission check to avoid out-of-gas failures or to budget transaction fees accurately.

## Known failure modes

- Invalid or malformed Ethereum-style address in 'to' or 'from' fields returns an error
- Malformed or non-hex 'data' field causes parsing failure
- Reverted simulation (e.g. insufficient balance or invalid contract call) may return an execution error or revert reason
- Network connectivity issues with Kaia RPC nodes may result in timeout or 503 errors
- Missing required fields may return a 400 Bad Request

## 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 specified transaction on the Kaia network, allowing callers to set appropriate gas limits and estimate fees before broadcasting the transaction.

## 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-kaia-network-gas-estimator-e31dc975/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)