# Tereno Trade Execution Notarize

> Tereno Trade Execution Notarize is a paid API for AI agents from www.tereno.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-16).

Audits and notarizes a completed DEX trade on Base by decoding token deltas, verifying pool state, and certifying clean execution free of dynamic fee gouging.

## Facts

- Endpoint: POST https://www.tereno.xyz/api/v1/capabilities/trade.execution.notarize/invoke
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tereno-trade-execution-notarize-191e6e42
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8P5T6-8fsRui0h7L8RgB5

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 tereno-trade-execution-notarize-191e6e42 -d '<json body>'
```

Example prompt: Notarize my completed Uniswap V4 swap on Base — the tx hash is 0x3a1b2c4d5e6f7890abcdef1234567890abcdef1234567890abcdef1234567890ab — I want to confirm it executed cleanly with no fee gouging and get the certified execution artifact.

## When to prefer this

Choose this endpoint when you need cryptographic certification that a completed Base DEX trade (Uniswap V3, V4, or Aerodrome) executed fairly — specifically to detect dynamic fee manipulation, decode exact token deltas, capture post-swap pool state, or seed a reusable execution artifact for downstream agent workflows. Prefer it over generic block explorers when you need a typed, machine-readable provenance envelope rather than raw transaction data.

## Known failure modes

- Invalid or malformed tx hash returns a 400 validation error
- Transaction not found on Base mainnet returns a not-found error
- Transaction is pending or unconfirmed and cannot be audited yet
- Transaction is not a recognized DEX swap (not Uniswap V3/V4 or Aerodrome) returns an unsupported protocol error
- RPC or indexer latency causes a timeout on recent blocks
- Dynamic fee gouging detected — returns a failed certification with details of the violation
- Payment not received results in x402 payment required response

## How this service works

Notarize a completed DEX trade on Base (Uniswap V4, Aerodrome, Uniswap V3). Audits onchain receipt, decodes token deltas and post-swap pool state, certifies clean execution without dynamic fee gouging, and seeds the shared execution artifact for reuse dividends.

## Output

Returns a certified execution artifact containing the decoded token deltas (amounts in and out), post-swap pool state for the relevant DEX (Uniswap V4, Aerodrome, or Uniswap V3), a fee-gouging clean-execution verdict, and a provenance envelope that can be reused by other agents for reuse dividends.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "txHash": {
   "type": "string",
   "pattern": "^0x[a-fA-F0-9]{64}$",
   "description": "Completed transaction hash on Base mainnet."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tereno-trade-execution-notarize-191e6e42/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.tereno.xyz](https://www.zero.xyz/host/www.tereno.xyz/llms.txt)