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Seneschal Private Watch — Monero/Zcash Payment Webhook
x402
Seneschal Private Watch — Monero/Zcash Payment Webhook is a paid API for AI agents from api.seneschal.space, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
Registers a view-key-based watcher on a Monero or Zcash address and fires an HMAC-signed webhook to your URL the moment an inbound payment arrives.
Price / call$0.1
Success—
StatusUnknown
How this service works
Create a Monero or Zcash view-key payment watch. The $0.10 fee IS your starting credit (nothing is lost to a creation charge). Body: { chain, address, viewKey, webhookUrl, birthdayHeight? }. Returns { watchId, watchToken, webhookSecret, expiresAt, creditAtomic }; verify webhooks with HMAC-SHA256(webhookSecret, body), top up via /v1/private/topup*. Prefer no USDC? POST /v1/private/watch-crypto (free call) creates + funds the watch in XMR/ZEC.
Output
A confirmation that the watch has been registered. Subsequently, whenever an inbound payment is detected on-chain at the specified address, Seneschal delivers an HMAC-signed HTTP POST to the provided webhook URL containing payment details such as amount and transaction ID.
Example use cases
Example prompt
“Watch my Monero address 4AdUndXHHZ6cfufTMvppY6JwXNouMBzSkbLYfpAV... using view key a1b2c3... and POST a signed notification to https://myapp.example.com/hooks/xmr-payment whenever a payment lands there.”
Technical details
Endpoint
POSThttps://api.seneschal.space/v1/private/watchWhen to prefer
Use this endpoint when you need real-time, server-push notification of inbound Monero or Zcash payments without custodying a spend key. It is uniquely suited for privacy-coin payment acceptance flows where polling is impractical and you only have a read-only view key. Prefer over generic blockchain explorers when you need webhook delivery, HMAC signing, and per-event billing via x402.
Side effects
- Invalid or incompatible view key for the given chain — returns 400 with key mismatch error
- Webhook URL unreachable or not HTTPS — rejected at registration
- Insufficient x402 USDC balance to cover idle fee — watch not created or suspended
- Invalid address format for selected chain — 400 bad request
- Birthday height beyond current chain tip — scan error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| address | string | Receiving address to watch. |
| viewKey | string | READ-ONLY view key (Monero private view key or Zcash UFVK). Cannot spend. |
| webhookUrl | string | HTTPS endpoint that receives an HMAC-signed POST per inbound payment. |
| birthdayHeight | integer | Optional scan-from height (defaults to tip). |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "monero",
"address": "<your-receiving-address>",
"watchId": "w_3f9c2e1a",
"expiresAt": "2026-07-12T00:00:00.000Z",
"watchToken": "<secret-bearer-token>",
"pricingTier": "standard",
"creditAtomic": "20000",
"testEndpoint": "/v1/private/watch/w_3f9c2e1a/test",
"webhookSecret": "<hmac-sha256-key>",
"topupEndpoints": {
"10c": "/v1/private/topup",
"1usd": "/v1/private/topup-1",
"5usd": "/v1/private/topup-5"
},
"pollIntervalSec": 60,
"signatureHeader": "<Signature-Header>: sha256=<HMAC-SHA256(webhookSecret, body)>",
"ratePerDayAtomic": "20000",
"ratePerCallAtomic": "5000"
}
}Tags
x402
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