Something you cannot do while your agent is dead: keep watching
Something you cannot do while your agent is dead: keep watching. One paid call buys 7 days of it — on-chain on Base (wallet activity, whale transfers, price crossings, new pools), a dead-man switch that fires when YOUR agent goes silent, a cron/schedule webhook, or a url-change web monitor. Every event carries a signed Ed25519 receipt proving a third party observed it then — which your own logs cannot. Webhook or pollable mailbox. No account: the wallet is the identity. 50 triggers.
100000 (raw units)
price
2
calls / 30d
2
unique payers
2026-09-17
updated
Provider
api.datasieve.xyz · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xFE31fD52A89461B8d54895cfCf86187aa3C95F21",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "100000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"condition": {
"debounceSeconds": 3600,
"minAmount": "1000000",
"token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"type": "token-transfers"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"expiresAt": "2026-07-17T00:00:00.000Z",
"id": "wt_01jzyx8k2mabcdefghjkmn",
"links": {
"events": "https://api.datasieve.xyz/watch/wt_01jzyx8k2mabcdefghjkmn/events",
"status": "https://api.datasieve.xyz/watch/wt_01jzyx8k2mabcdefghjkmn"
},
"secret": "whsec_...returned once, keep it: it authenticates status/events reads and signs your webhooks",
"state": "active",
"tier": "standard",
"triggerCap": 50,
"triggersUsed": 0
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"condition": {
"description": "One watch condition. type selects the kind; the other fields depend on it. ANY condition also accepts debounceSeconds (collapse a burst of matches into one delivery — set it unless you want every hit, because a watch stops at its trigger cap) and dedupeKey (never fire twice for the same logical event).",
"oneOf": [
{
"properties": {
"address": {
"description": "0x wallet address on Base to watch",
"type": "string"
},
"direction": {
"default": "both",
"enum": [
"in",
"out",
"both"
]
},
"minEth": {
"description": "only native transfers >= this many ETH",
"type": "string"
},
"type": {
"const": "wallet-activity"
}
},
"required": [
"type",
"address"
]
},
{
"properties": {
"minAmount": {
"description": "whale threshold in human token units, e.g. \"50000\"",
"type": "string"
},
"token": {
"description": "0x ERC-20 token address on Base",
"type": "string"
},
"type": {
"const": "token-transfers"
}
},
"required": [
"type",
"token",
"minAmount"
]
},
{
"properties": {
"direction": {
"enum": [
"above",
"below"
]
},
"pool": {
"description": "Uniswap v2 pair or v3 pool address on Base",
"type": "string"
},
"threshold": {
"description": "price of token0 in token1 units",
"type": "string"
},
"type": {
"const": "price-cross"
}
},
"required": [
"type",
"pool",
"direction",
"threshold"
]
},
{
"properties": {
"minQuoteLiquidity": {
"description": "min initial liquidity on the WETH/USDC side, human units",
"type": "string"
},
"type": {
"const": "new-pairs"
}
},
"required": [
"type"
]
},
{
"properties": {
"graceSeconds": {
"description": "extra allowance before alarming (default: interval/4, min 60)",
"type": "integer"
},
"intervalSeconds": {
"description": "dead-man switch: your agent must hit its pingUrl at least this often; silence past interval+grace fires the alarm",
"maximum": 604800,
"minimum": 60,
"type": "integer"
},
"label": {
"description": "name echoed in alarm events, e.g. \"trader-prod\"",
"type": "string"
},
"type": {
"const": "heartbeat"
}
},
"required": [
"type",
"intervalSeconds"
]
},
{
"properties": {
"at": {
"description": "one-shot: fire once at this ISO 8601 time (must be future)",
"type": "string"
},
"cron": {
"description": "cron expression, e.g. \"0 9 * * *\" (daily 09:00)",
"type": "string"
},
"everySeconds": {
"description": "cron for agents: fire a webhook/mailbox event every N seconds",
"minimum": 60,
"type": "integer"
},
"label": {
"type": "string"
},
"payload": {
"description": "echoed verbatim in the fired event — your wake-up context"
},
"type": {
"const": "schedule"
},
"tz": {
"description": "IANA timezone for cron, default UTC",
"type": "string"
}
},
"required": [
"type"
]
},
{
"properties": {
"label": {
"type": "string"
},
"pollSeconds": {
"default": 600,
"description": "poll interval, floor 300s",
"minimum": 300,
"type": "integer"
},
"regex": {
"description": "regex scoping: hash the joined matches (applied after selector if both set)",
"type": "string"
},
"selector": {
"description": "CSS selector scoping what counts as \"the page\" (matched elements' text is hashed) — without it whole-page text is used and noisy pages false-positive",
"type": "string"
},
"type": {
"const": "url-change"
},
"url": {
"description": "public http(s) page to monitor for content changes",
"type": "string"
}
},
"required": [
"type",
"url"
]
}
],
"type": "object"
},
"renew": {
"description": "INSTEAD of the other fields: pass an existing standard watch id (wt_...) to renew it for another 7 days at the same price",
"type": "string"
},
"webhookUrl": {
"description": "optional https endpoint to receive HMAC-signed event POSTs; omit to poll GET /watch/:id/events instead",
"type": "string"
}
}
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://api.datasieve.xyz/watch/standard" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.datasieve.xyz/watch/standard");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://api.datasieve.xyz/watch/standard")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/4645.json, and this resource appears in /discovery/resources and /discovery/search.