# SYNTHORA eth_getTransactionByHash RPC

> SYNTHORA eth_getTransactionByHash RPC is a paid API for AI agents from rpc-tx.hergertsynthora.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Fetches a full transaction object by hash from Base, Ethereum, Polygon, Arbitrum, or Optimism via eth_getTransactionByHash, returning an Ed25519-signed deterministic result.

## Facts

- Endpoint: POST https://rpc-tx.hergertsynthora.com/service
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-eth-gettransactionbyhash-rpc-c940601f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BN-x7kVb7JUZAwlLrB-Y8

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 synthora-eth-gettransactionbyhash-rpc-c940601f -d '<json body>'
```

Example prompt: Can you look up the full details of Ethereum transaction 0x4e3a...b7f2 on Base — I need to see the sender, receiver, value, and gas used.

## When to prefer this

Use this endpoint when you need to retrieve a complete EVM transaction object by its hash across Base, Ethereum, Polygon, Arbitrum, or Optimism — especially when deterministic, signed results are required for auditability, and pay-per-call micro-billing via x402 is acceptable. Prefer over generic RPC providers when tamper-evident Ed25519 signatures on responses add value.

## Known failure modes

- Invalid transaction hash format returns an error
- Unknown chain identifier returns an error
- Transaction not found (hash doesn't exist on specified chain) returns null result
- Upstream RPC failure returns error with no charge
- Missing or malformed X-WALLET header may block free-tier access
- Payment failure via x402 blocks access after free tier exhausted

## How this service works

Get a full transaction by hash via eth_getTransactionByHash on Base/Ethereum/Polygon/Arbitrum/Optimism. Deterministic, Ed25519-signed.

## Output

A full transaction object including from/to addresses, value transferred, gas price and usage, input data, block number, transaction index, nonce, and signature fields — signed with Ed25519 for tamper-evidence. Returns empty or error on upstream failure with no charge.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "hash"
 ],
 "properties": {
  "hash": {
   "type": "string",
   "description": "hash"
  },
  "chain": {
   "type": "string",
   "description": "chain"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-eth-gettransactionbyhash-rpc-c940601f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rpc-tx.hergertsynthora.com](https://www.zero.xyz/host/rpc-tx.hergertsynthora.com/llms.txt)