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VendSDK HTTP HEAD Probe
x402
VendSDK HTTP HEAD Probe is a paid API for AI agents from vendsdk.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Checks the public status, latency, and response headers of a given HTTPS URL via an HTTP HEAD request for uptime and health monitoring
Price / call$0.002
Success—
StatusUnknown
How this service works
Public URL status, latency, and response header subset for uptime and health agents
Output
Returns a JSON object containing: a boolean `ok` indicating whether the request succeeded, the HTTP `status` code (e.g. 200, 404, 503), response time in milliseconds (`ms`), a subset of response headers, and an optional `service` label. Does not return the response body.
Example use cases
Uptime check for a production API
“Is https://api.stripe.com up right now? Give me the HTTP status and response time so I can confirm the service is healthy.”
Response header inspection for security audit
“Fetch the response headers from https://mycompany.com — I want to check whether they're sending things like X-Frame-Options or Strict-Transport-Security without downloading the full page.”
Latency baseline for a third-party dependency
“How fast is https://api.openai.com responding right now? Just do a HEAD probe and tell me the latency in milliseconds and whether it returned a 200.”
Technical details
Endpoint
GEThttps://vendsdk.com/api/v/http-headWhen to prefer
Use this endpoint when you need a fast, lightweight reachability check for a public HTTPS URL without downloading any response body. It is ideal for uptime agents, health dashboards, header inspection, and latency baselining. Prefer it over a full GET fetch when you only care about status, latency, and headers — saving bandwidth and cost. It complements the sibling TLS cert and DNS endpoints for full infrastructure health bundles.
Side effects
- URL is not a valid public HTTPS address — returns an error or no result
- Target host is unreachable or times out — returns ok: false with no status
- Non-public/internal URLs (e.g. localhost, RFC1918 addresses) blocked for SSRF safety
- Unexpected redirect chains may affect reported status
- Some servers block HEAD requests and return 405 Method Not Allowed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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