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DataSieve Composite Watch
x402
DataSieve Composite Watch is a paid API for AI agents from api.datasieve.xyz, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).
Creates a multi-condition blockchain/time/heartbeat watcher on Base that fires webhook alerts when any configured condition triggers, paid per call via x402.
Price / call$0.25
Success—
StatusUnknown
How this service works
Standing infrastructure for ephemeral AI agents, paid per call over x402. Watches, dead-man switches, and multi-agent coordination. No account; wallet as identity.
Output
A JSON object containing a unique watch ID (wt_...), a one-time webhook secret for authenticating event deliveries, URLs for polling watch status and retrieving events, the expiry timestamp (7 days out), the maximum trigger cap (200), and current trigger count. The secret is returned only once and must be stored immediately.
Example use cases
Whale alert for DeFi trading bot
“Create a watch that fires my webhook at https://alerts.mybot.io/hook whenever more than 50000 USDC moves on Base — I want to catch whale transfers so my trading agent can react in real time.”
Dead-man switch for a production agent
“Set up a heartbeat monitor for my agent called 'trader-prod' — it will ping the provided URL every 300 seconds, and if it goes silent for more than 375 seconds I want an alarm fired to https://ops.myagent.io/deadman.”
New liquidity pair detector
“Watch for any new trading pairs launched on Base with at least 5 ETH of initial quote liquidity and notify my webhook at https://scanner.defi.io/new-pairs as soon as one appears.”
Technical details
Endpoint
POSThttps://api.datasieve.xyz/watch/compositeWhen to prefer
Choose this endpoint when you need to combine multiple heterogeneous Base blockchain triggers (wallet activity, token transfers, price crossings, new pairs) plus time-based or heartbeat conditions into a single watch object with one payment. Prefer it over polling your own RPC node when you want standing infrastructure that survives agent restarts, dead-man switch capability for production agent health monitoring, or multi-condition coordination without maintaining persistent state yourself.
Side effects
- Invalid or missing condition type returns 400 with validation error
- Passing a non-existent watch ID in 'renew' returns 404
- Payment not included or insufficient USDC returns 402
- Pool or wallet address not on Base network may result in no events firing
- Webhook URL unreachable causes silent event loss; no retry SLA guaranteed
- Watch expires after 7 days if not renewed, all triggers cease
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| renew | string | INSTEAD of the other fields: pass an existing composite watch id (wt_...) to renew it for another 7 days at the same price |
| conditions | array | up to 5 conditions; the watch fires when ANY of them matches |
| webhookUrl | string | optional https endpoint to receive HMAC-signed event POSTs; omit to poll GET /watch/:id/events instead |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "wt_01jzyx8k2mabcdefghjkmn",
"tier": "composite",
"links": {
"events": "https://api.datasieve.xyz/watch/wt_01jzyx8k2mabcdefghjkmn/events",
"status": "https://api.datasieve.xyz/watch/wt_01jzyx8k2mabcdefghjkmn"
},
"state": "active",
"secret": "whsec_...returned once, keep it: it authenticates status/events reads and signs your webhooks",
"expiresAt": "2026-07-17T00:00:00.000Z",
"triggerCap": 200,
"triggersUsed": 0
}
}Tags
x402
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