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agent-exec Drift Monitor — API Endpoint Change Detector
x402
agent-exec Drift Monitor — API Endpoint Change Detector is a paid API for AI agents from agent-exec.448c.net, paid per call via x402, $0.0061/call, status unknown (last checked 2026-10-11).
Fetches a live snapshot of a known AI-agent-related API endpoint and compares it to a previously recorded baseline, returning both versions and a diff event log.
Price / call$0.0061
Success—
StatusUnknown
How this service works
Accountless, pay-per-use code execution for software agents: submit source code, get stdout, stderr and exit code back from an isolated, network-less sandbox. No account, no API key -- possession of valid payment is sufficient.
Output
Returns an object with two snapshots: t1 (the archived baseline) and t2 (the freshly fetched live response), each containing the URL, HTTP status, content type, body text, body byte count, SHA-256 hash, and fetch timestamp. Also includes a list of diff events describing what changed between the two snapshots.
Example use cases
Detect changes in agent registry
“Has the x402-list endpoint changed since it was last archived? Fetch the live version and tell me if the body or status is different from the recorded baseline.”
Verify clearedindex API stability
“Check the clearedindex venue right now and compare it to its stored snapshot — I want to know if anything in the response body has shifted or if the HTTP status changed.”
Monitor verantis for drift
“Run a drift check on the verantis endpoint and show me both the baseline and the current live response so I can see whether they match or what events were detected.”
Technical details
Endpoint
POSThttps://agent-exec.448c.net/drift?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to detect whether one of a fixed set of known AI-agent-related API venues (agentry, clearedindex, percall, verantis, x402-list) has changed from a previously recorded snapshot. It is purpose-built for drift monitoring of agent discovery infrastructure, not for arbitrary URL fetching or general-purpose web scraping.
Side effects
- Live fetch fails to reach a response — t2 fields like http_status, body, and body_sha256 will be null
- Venue enum value not recognized — request rejected with validation error
- Network timeout on live fetch — t2 shows no response data
- Baseline not available for the requested venue — t1 may be incomplete
- Payment validation failure — HTTP 402 returned before execution begins
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| venuerequired | string | One of the endpoints we already snapshot. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| t1required | object | |
| t2required | — | |
| venuerequired | string | |
| eventsrequired | — | Our typed diff between t1 and t2, or null if t2's body did not parse as JSON (or t1 has no recorded fingerprint) -- verify against t1.body/t2.body yourself rather than trusting this. |
| payment | object | Always present -- POST /drift and POST /drift/{venue} are both paid, unlike GET /drift/{venue}'s free baseline check. |
Tags
x402
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