Seneschal Control Panel — Private Watch via WalletConnect

What this is. A convenience UI on top of the same public REST API at api.seneschal.space. Connect any EVM wallet via WalletConnect (or MetaMask). Pay for watches, top-ups and historical scans in USDC on Base via the x402 protocol — no account, no API key, no sign-up. Every action below shows the equivalent API call so you can graduate to your own automation any time. View keys never leave your browser except to be sent over TLS to the API for the specific action.

Create a new payment-monitoring watch

You'll be asked to sign an EIP-3009 transferWithAuthorization for $0.10 USDC on Base. Once payment is verified by the openx402 facilitator the watch is created with $0.10 of starter credit (~5 idle days at the $0.02/day rate). Top up any time.

Chain Address primary or a subaddress you control View key read-only — cannot spend Webhook URL HTTPS only in production; we POST signed events here Birthday height optional; speeds up first scan if your wallet is recent

Equivalent API call

curl + your own x402 signer

curl -s https://api.seneschal.space/v1/private/watch \
	-X POST -H "content-type: application/json" \
	-H "x-payment: <base64 EIP-3009 payload, $0.10 USDC on Base>" \
	-d '{
		"chain": "monero",
		"address": "44AFFq…",
		"viewKey": "0123…",
		"webhookUrl": "https://your.server/seneschal-hook"
	}'

Node.js (x402-fetch wraps the payment flow)

import { wrapFetchWithPayment } from "x402-fetch";
import { createWalletClient, http } from "viem";
import { base } from "viem/chains";

const fetchPaid = wrapFetchWithPayment(fetch, walletClient);
const r = await fetchPaid("https://api.seneschal.space/v1/private/watch", {
	method: "POST",
	headers: { "content-type": "application/json" },
	body: JSON.stringify({ chain, address, viewKey, webhookUrl })
});
const { watchId, watchToken, webhookSecret } = await r.json();

MCP (for AI agents already in a paid session)

tool: seneschal_private_watch_create
input: { chain, address, viewKey, webhookUrl }

My watches stored in this browser’s localStorage

Watches you create on this device are remembered locally so you can top up, check status and cancel them. Nothing is sent to our server about your saved list — the API only knows the watchToken we hand back at creation, and we cannot reconstruct that for you if you lose this browser. Export / import a JSON backup any time.

Equivalent API calls — managing a watch

Status (free)

curl -s -H "x-watch-token: <token>" \
	https://api.seneschal.space/v1/private/watch/<watchId>

Top up — $0.10 / $1 / $5 tier

curl -s -X POST https://api.seneschal.space/v1/private/topup-1 \
	-H "x-payment: <base64 EIP-3009, $1.00 USDC on Base>" \
	-H "content-type: application/json" \
	-d '{"watchId":"…","watchToken":"…"}'

Cancel (free, no refund)

curl -s -X DELETE -H "x-watch-token: <token>" \
	https://api.seneschal.space/v1/private/watch/<watchId>

One-off historical lookup

Single $0.50 USDC payment runs a full historical scan against the view key you supply and returns aggregated totals (received / spent / spendable in atomic units) and optionally per-note breakdowns. Your view key transits our process in memory only — it is never written to our SQLite or logs.

Chain Address View key Birthday height optional; Zcash auto-detects if blank Include per-note breakdown

Equivalent API call

curl -s -X POST https://api.seneschal.space/v1/private/historical \
	-H "x-payment: <base64 EIP-3009 payload, $0.50 USDC on Base>" \
	-H "content-type: application/json" \
	-d '{
		"chain": "monero",
		"address": "44AFFq…",
		"viewKey": "0123…",
		"includeNotes": true
	}'

Derive a Zcash viewing key from a BIP-39 phrase

Free, no payment. Rate-limited 6/min/IP. Forwards your phrase to the local orchard-scanner derive-ufvk command and returns the matching read-only Unified Full Viewing Key.

Security warning. Your seed phrase transits over TLS to api.seneschal.space. We do not log or persist it, but a network attacker between you and us would see the bytes. For maximum safety, derive offline using orchard-scanner. Leave the textarea blank to use the canonical BIP-39 test vector (no risk).

Chain Network BIP-39 phrase 12 or 24 words; blank = test vector

Equivalent API call

curl -s -X POST https://api.seneschal.space/v1/private/derive-viewkey \
	-H "content-type: application/json" \
	-d '{"chain":"zcash","network":"mainnet","phrase":"abandon abandon … art"}'