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Annalist x402 Service Registry Change Tracker
x402
Annalist x402 Service Registry Change Tracker is a paid API for AI agents from api.annalist.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).
Returns a daily breakdown of new services, price changes, and payout wallet changes across the x402 paid-API ecosystem over a configurable lookback window.
Price / call$0.01
Success—
StatusUnknown
How this service works
Signed data for AI agents, paid per call over x402. Hyperliquid crowd state, smart money and liquidations with what historically happened next, plus independent checks of x402 services and MCP servers.
Output
A JSON object containing an array of daily records, each with the date, the count of newly listed services, the count of price changes (broken down into raised and lowered), and the count of services that changed their payout wallet address.
Example use cases
Weekly x402 ecosystem activity digest
“Give me a day-by-day summary of what changed in the x402 API marketplace over the last 7 days — how many new services appeared, which ones changed prices, and if any swapped payout wallets.”
Spot price changes for a specific service
“Check the Annalist changes feed for api.someservice.dev over the last 30 days and tell me if they raised or lowered their prices at any point.”
Detect suspicious payout wallet rotations
“Pull the x402 registry change history for the past 3 days and flag any services that changed their payout wallet address — I want to know if something looks like a wallet hijack.”
Technical details
Endpoint
GEThttps://api.annalist.dev/v1/checks/changes?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a structured, day-by-day audit trail of changes happening across the x402 paid API ecosystem — especially for price intelligence, new service discovery cadence, or detecting suspicious wallet changes. Prefer it over general web scraping when you want signed, authoritative data about x402-listed services with a low per-call cost.
Side effects
- days parameter out of range (>7 for market-wide, >30 for single host) may return validation error
- unknown or misspelled host returns empty dataset or 404
- payment not completed via x402 results in 402 response before data is returned
- stale or lagging data if registry indexing is delayed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"days": [
{
"date": "2026-10-13",
"services_new": {
"count": 31
},
"price_changes": {
"count": 6,
"raised": 4,
"lowered": 2
},
"payout_wallet_changes": {
"services": 0
}
}
]
}
}
}Tags
x402
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