# Seneschal Monero Fee Estimate

> Seneschal Monero Fee Estimate is a paid API for AI agents from api.seneschal.space, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns the current recommended transaction fee for the Monero network, including fee-per-byte and estimated total fee at various priority levels.

## Facts

- Endpoint: GET https://api.seneschal.space/v1/q/xmr/fee-estimate
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/seneschal-monero-fee-estimate-6cde00f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vcCSy1Y8jzTs3KGfFbxSG

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 seneschal-monero-fee-estimate-6cde00f0
```

Example prompt: What's the current recommended Monero transaction fee — give me the normal priority fee in both XMR and piconero, plus the fee per byte.

## When to prefer this

Use this endpoint when you need a real-time, pay-per-call Monero fee estimate without requiring an account or API key. It is especially suited for agents that handle Monero payments and need to programmatically determine the correct fee before constructing or broadcasting a transaction. Prefer this over self-hosted node queries when you lack direct Monero node access.

## Known failure modes

- Payment not received or insufficient USDC payment via x402 — returns 402 Payment Required
- Monero node temporarily unavailable — may return a 503 or stale data
- Malformed request — returns 400 Bad Request
- Network congestion or upstream node issues may cause delayed or inaccurate fee estimates

## How this service works

Pay-per-call services for the agent economy: a webhook the moment a Monero or Zcash payment lands at your address (view-key only), single-fact x402 data APIs, a paid public notice board, a stablecoin gas paymaster and a permissionless Ethereum block builder. No account, no API key — pay in USDC on Base or in XMR/ZEC.

## Output

A JSON object containing the chain name ('monero'), a millisecond timestamp of when the fee was measured, an array of priority levels (e.g. 'normal') each with an estimated fee in XMR and piconero, the fee per byte in piconero, and the typical transaction size in bytes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "monero",
  "as_of_ms": 1765532000000,
  "priorities": [
   {
    "level": "normal",
    "est_fee_xmr": 0.00003,
    "est_fee_piconero": 30000000,
    "fee_per_byte_piconero": 20000
   }
  ],
  "fee_per_byte_piconero": 20000,
  "typical_tx_size_bytes": 1500
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/seneschal-monero-fee-estimate-6cde00f0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.seneschal.space](https://www.zero.xyz/host/api.seneschal.space/llms.txt)