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ChainRay Watch Diff
x402
ChainRay Watch Diff is a paid API for AI agents from chainray.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-22).
Retrieves the diff/changes for a specific blockchain watch subscription by watchId, enabling real-time monitoring of on-chain state changes.
Price / call$0.005
Success—
StatusUnknown
How this service works
Blockchain data and intelligence service for AI agents. 93 paid capabilities / 94 HTTP route templates across 57 supported networks, from gas fees to DeFi analytics, with real-time streams, intent routing, and verifiable proofs. Pay-per-request via x402.
Output
Returns a structured diff object representing what changed on-chain since the last poll for the given watchId. Typically includes changed state fields, transaction events, block numbers, and timestamps of detected changes across the specified blockchain network.
Example use cases
DeFi position change alert
“Fetch the latest diff for my watch ID 'pos-0x9f3a' on Ethereum — I want to see if my liquidity position in the pool has changed since the last poll.”
Smart contract state monitoring
“Pull the on-chain diff for watch subscription 'contract-watch-42' on Polygon — I need to know if any state variables in the contract have been updated recently.”
Whale wallet activity tracking
“Get the latest changes from my whale wallet watcher with ID 'whale-0xdeadbeef' on Base — show me what transactions or balance changes have occurred.”
Technical details
Endpoint
GEThttps://chainray.online/watch-diff/%7BwatchId%7D?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have already registered a watch subscription on ChainRay and need to poll for incremental on-chain changes (diffs) rather than querying full state. Ideal for event-driven agents that need to react to blockchain state changes without re-fetching entire datasets. Prefer this over full data pulls when monitoring specific addresses, contracts, or positions over time.
Side effects
- Invalid or expired watchId returns 404 or empty diff
- Unsupported chain parameter results in 400 error
- Payment failure via x402 returns 402 Payment Required
- Watch subscription has been deleted or timed out
- Network congestion causes delayed or stale diff data
- Rate limiting if polling too frequently
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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