# Synapse API — Injective Gas Estimator

> Synapse API — Injective 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 2026-09-16).

Estimates the gas cost for a transaction on the Injective blockchain network before submission

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/injective/gas/estimate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-injective-gas-estimator-4d565db8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WOYcIiEQ2HXrbeudQEp5X

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-injective-gas-estimator-4d565db8 -d '<json body>'
```

Example prompt: Estimate the gas cost for an Injective transaction from address inj1abc...123 to inj1xyz...456 with data payload 0xabcdef and value 1000000000000000000.

## When to prefer this

Use this endpoint when you need to estimate gas costs specifically on the Injective blockchain network before submitting a transaction, particularly for DeFi operations, token transfers, or smart contract interactions on Injective. Prefer this over general Ethereum gas estimators since it targets the Injective network specifically.

## Known failure modes

- Invalid or malformed wallet addresses return a validation error
- Unsupported transaction data format may cause estimation failure
- Network connectivity issues to the Injective RPC may return a timeout or service unavailable error
- Missing required fields may return a 400 bad request
- Extremely complex contract calls may exceed estimation limits

## 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 (numerical value) representing the predicted gas units required to execute the specified transaction on the Injective blockchain, enabling the caller to calculate the total fee 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-injective-gas-estimator-4d565db8/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)