# Synapse API — TRON Gas Estimator

> Synapse API — TRON 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 the gas (energy/bandwidth) cost for a transaction on the TRON blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/tron/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-tron-gas-estimator-bbba0780
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_80btlJHS_2a0iFz8i_LXL

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-tron-gas-estimator-bbba0780 -d '<json body>'
```

Example prompt: Estimate the gas cost for a TRON transaction from wallet TBcXxxxxxxxxSenderAddress sending 100 TRX to TRzxxxxxxxxRecipientAddress with no additional data.

## When to prefer this

Use this endpoint when you need a pre-flight gas estimate specifically for TRON network transactions. Prefer this over generic blockchain fee estimators when the target chain is TRON (TRX) and you need energy/bandwidth cost breakdown. Useful for wallets, DeFi applications, or any agent automating TRON transactions that needs cost awareness before committing.

## Known failure modes

- Invalid or malformed TRON address format returns an error
- Missing required 'to' or 'from' fields cause a 400 bad request
- Contract simulation failure if the data payload references an invalid contract
- Network timeout if the TRON node is unreachable
- Insufficient payment (x402) results in a 402 Payment Required 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/energy and bandwidth cost for the described TRON transaction, allowing the caller to predict network fees before submitting the transaction on-chain. Typically includes energy consumed, bandwidth used, and an estimated TRX fee amount.

## 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-tron-gas-estimator-bbba0780/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)