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Changelog State API – Vercel Change History
x402
Changelog State API – Vercel Change History is a paid API for AI agents from changelog-state-api.replit.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns detected changelog update history (new releases, version changes, breaking signals, etc.) for the Vercel vendor, filterable by change type and date.
Price / call$0.01
Success—
StatusUnknown
How this service works
Detected changelog update history for one tracked vendor.
Output
A JSON array of detected changelog change records for Vercel, each containing a change type (e.g. new_release, version_changed, breaking_signal), detection timestamp, and relevant metadata. Results are filterable by change type and date range, with a configurable limit up to 200 rows.
Example use cases
Breaking change alert for Vercel
“Check the Vercel changelog for any breaking_signal changes detected since the start of this month and let me know what came up — give me up to 50 results.”
Track new Vercel releases over time
“Fetch the full new_release changelog history for Vercel going back to 2023-06-01T00:00:00Z, up to 200 entries, so I can see how often they've been shipping releases.”
Audit recent Vercel version changes
“Show me all version_changed entries detected in the Vercel changelog over the last two weeks — I want to see what version bumps have happened.”
Technical details
Endpoint
GEThttps://changelog-state-api.replit.app/api/monitors/vercel/changesWhen to prefer
Choose this endpoint when you need a filtered, structured history of detected changelog mutations for Vercel specifically — particularly when you want to isolate breaking signals, version bumps, or new releases over a specific time window. It is ideal for automated monitoring pipelines or agents that need to react to Vercel's changelog changes programmatically.
Side effects
- Invalid or unknown vendor slug returns 404 or empty result set
- Invalid change type enum value returns 400 validation error
- Malformed since date-time format causes 400 parse error
- Limit out of range (below 1 or above 200) triggers schema validation error
- Payment not provided or insufficient USDC balance returns 402
- Service unavailability on Replit hosting returns 503 or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object | Detected changelog update history (paid) |
Tags
x402
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