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Agent Rest Stop – Fallback URL Lookup
x402
Agent Rest Stop – Fallback URL Lookup is a paid API for AI agents from agent-gas-station.agent-gas-station.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Returns the fallback URL for a given tool when its primary health check is stale or failing.
Price / call$0.01
Success—
StatusUnknown
How this service works
A sibling tool when health is old.
Output
Returns the fallback URL associated with the specified tool ID, to be used when the tool's primary health status is outdated or unavailable.
Example use cases
Reroute unhealthy tool traffic
“Tool 'swap-router-main' is returning old health data — fetch its fallback URL so I can redirect calls to the backup endpoint.”
Agent pipeline resilience check
“Before my workflow runs, grab the fallback URL for tool 'venue-lookup' in case its primary goes down mid-run.”
Incident response URL resolution
“We're seeing failures on tool 'stablecoin-pricer' — what's the registered fallback URL for it so I can reroute immediately?”
Technical details
Endpoint
POSThttps://agent-gas-station.agent-gas-station.workers.dev/v1/FallbackUrl?utm_source=zero.xyzWhen to prefer
Use this endpoint when a tool's health status is stale and you need to know which fallback URL to route requests to. Prefer this over a general health check endpoint when you specifically need the redirect/fallback destination rather than a health status summary.
Side effects
- Unknown tool_id returns an empty or null URL
- Stale or missing fallback registration returns a 404 or empty response
- Invalid input schema (missing tool_id) returns a 400 error
- Network timeout if the worker is under load
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tool_id | string |
Tags
x402
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