API Health Check
Check reachability, HTTP status, latency and a few safe response headers.
Free diagnostics · No signup · No secretsCheck an API endpoint
Check an API endpoint
or a webhook JSON sample.
Check a public API endpoint or test a sanitized JSON payload. Do not enter passwords, private keys, tokens or production credentials.
Webhook Payload Tester
Send a sanitized JSON sample to NAIF Gravity for a bounded structure check. Do not paste secrets or signatures.
Troubleshooting library
Guides for MCP, webhook signing and JSON errors.
Use these guides when the free tool is too general or the failure is specific to MCP, webhook signing, JSON syntax or n8n field paths.
MCP server not responding
Locate whether startup, initialization, listing or one tool call is failing.
MCP tool schema invalid
Separate invalid tool definitions from invalid call arguments.
Webhook signature mismatch
Check raw bytes, signing contract and replay/timestamp rules.
JSON syntax repair
Fix a bounded parse error and validate the repaired value.
Safety boundary: public URLs only. Private/local network targets are rejected. Diagnostics are intentionally shallow and do not execute supplied code.
New · Agent Intelligence
Describe the error to find a matching service.
Describe an MCP, API, webhook or automation failure in plain language to search the catalog. Supported browsers can use on-device AI and expose read-only tools to compatible agents.
Searching the catalog does not start checkout or require secrets or another subscription.