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API & MCP reference
API tokens & auth-first
What it does: REST and MCP-backed APIs authenticate with tokens — Bearer, X-API-Key, or OAuth.
Use it for: the auth-first rule — if the API auth fails (401/403), the connection AND any automation on top of it fail, so check auth before chasing 'connectivity'. SubnetSlinger's HTTP ▸ Auth check tests exactly this (vendor presets, or Bearer / X-API-Key / Basic).
Notes: rotate tokens; store them in the Vault, never in scripts or configs.