# Synapse API — Zora Gas Estimator

> Synapse API — Zora 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 2026-09-15).

Estimates gas costs for a transaction on the Zora blockchain network given sender, recipient, data, and value fields.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/zora/gas/estimate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-zora-gas-estimator-d2252186
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t5im1iqSx5PN0hg5dPtgH

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-zora-gas-estimator-d2252186 -d '<json body>'
```

Example prompt: Can you estimate the gas cost for a Zora transaction from 0xAbC...123 to 0xDeF...456 with calldata 0xd0e30db0 and value 0?

## When to prefer this

Use this endpoint when you need a gas cost estimate specifically for the Zora blockchain network before submitting a transaction. Prefer this over generic EVM gas estimators when working with Zora NFT contracts, Zora creator tools, or any Zora L2 interaction. It's best for pre-flight checks to prevent transaction failures or budget overruns.

## Known failure modes

- Invalid or malformed address in 'to' or 'from' fields returns a validation error
- Malformed hex calldata in 'data' field causes a parse error
- Zora RPC node unavailable returns a 5xx error
- Transaction would revert on-chain may return a gas estimation failure or error message
- Missing required fields may return a 400 bad request
- Very high gas estimates if calldata is unexpectedly large

## 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 Zora transaction — used to predict transaction cost before submission. May include estimated gas limit and possibly a fee in native token terms.

## 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-zora-gas-estimator-d2252186/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)