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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.45.67.221.128.sslip.io, paid per call via x402, $0.0061/call, status unknown (last checked 2026-09-15).
Fetches a live snapshot of a known API-discovery venue and compares it to a stored baseline, returning both bodies, metadata, and a diff-events list so agents can detect changes.
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 a JSON object with two snapshots: t1 (archived baseline with URL, HTTP status, content-type, body, byte count, SHA-256, and fetch time) and t2 (live fetch with the same fields plus the final redirect URL), plus a venue label and an events array describing detected differences between the two.
Example use cases
Detect changes to API marketplace listings
“Has the clearedindex venue changed since it was last snapshotted? Fetch it now and tell me if the body hash is different and what events were detected.”
Automated drift alert for agent directory
“Monitor the agentry venue for any drift — compare today's live fetch against the baseline and flag any events showing content changes.”
Verify percall venue integrity before relying on it
“Before I use percall's listings, can you confirm its current body matches the stored baseline and there are no unexpected diff events?”
Technical details
Endpoint
POSThttps://agent-exec.45.67.221.128.sslip.io/driftWhen to prefer
Use this endpoint when you need to compare a known API-discovery venue's current live state against a stored baseline without setting up any account or API key — ideal for lightweight agent-driven change detection on a pay-per-use basis. Prefer it over generic web-diffing tools when the target is one of the five supported x402/agent-discovery venues and you want structured diff events plus cryptographic body hashes.
Side effects
- Invalid venue enum value — request rejected with validation error
- Live fetch network timeout — t2 fields may be null
- Target venue returns non-200 status — captured in t2.http_status but body may be null
- Payment failure (HTTP 402) — call not executed if x402 payment is invalid or insufficient
- SHA-256 mismatch with no events — body changed but diff parser found no structured events
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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