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Watchlist Diff
x402
Watchlist Diff is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-20).
Snapshots up to 10 token addresses and returns only the deltas (liquidity, price, honeypot status, sell-tax, liquidity pulls) since the last check via a watchId.
Price / call$0.06
Success—
StatusUnknown
How this service works
Retention in one call: pass up to 10 tokens to snapshot them and get a watchId; call again with that watchId to get only the DELTAS since last time — liquidity ±%, price ±%, became-honeypot, sell-tax spiked, liquidity pulled. The second call is worth more than the first. Built for agents holding positions that re-check daily.
Output
On the first call (with token addresses), returns a watchId and a baseline snapshot of each token's liquidity, price, and safety status. On subsequent calls (with watchId), returns only the deltas since the last check — percentage changes in liquidity and price, newly flagged honeypot status, sell-tax spikes, and liquidity pull events. Unchanged tokens are omitted, making the second call the high-signal result.
Example use cases
Daily rug-pull risk check for held positions
“I'm holding positions in these three tokens on Base — 0xToken1, 0xToken2, 0xToken3. Create a watchlist for them now, and then tomorrow re-check using the watchId and tell me if any liquidity was pulled, sell-tax spiked, or one of them became a honeypot overnight.”
DeFi portfolio safety monitoring agent
“I want to monitor my 8-token DeFi portfolio for sudden risk changes — here are the addresses: 0xA1, 0xB2, 0xC3, 0xD4, 0xE5, 0xF6, 0xG7, 0xH8. Snapshot them now and every 24 hours give me only the deltas — what changed in liquidity, price, or safety status.”
Post-trade honeypot and liquidity surveillance
“I just bought into 0xNewToken and want to keep an eye on it alongside 0xExistingToken1 and 0xExistingToken2. Add them to a watchlist and check back with that watchId in a few hours to see if anything suspicious happened — liquidity drop, tax spike, or honeypot flag.”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/watchlist-diff?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent needs to repeatedly monitor a fixed set of tokens for risk changes (honeypot, liquidity pull, tax spike) without re-fetching full data each time. The delta model is ideal for daily or periodic re-checks where only changes matter, minimizing cost and noise. Prefer this over one-off token safety checks when the agent is holding positions and needs ongoing surveillance rather than a single point-in-time assessment.
Side effects
- Invalid or expired watchId returns an error — watchIds may have a TTL and must be re-initialized
- More than 10 token addresses causes the request to fail or be truncated
- Invalid token address format (non-checksummed or wrong chain) returns no data for that token
- Network or RPC errors fetching on-chain state may cause partial results
- First call returns baseline only, not deltas — agent must store watchId and call again to get meaningful diff data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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