Business — entry 014 of 19
Signaliz
Signaliz's REST API (`api.signaliz.com/functions/v1`, a Supabase edge-function gateway) covers email finding/verification, company-signal enrichment, and "System" automation pipelines that other tools can drive via a TypeScript SDK, CLI, or MCP server for AI agents. A live GET against the base path with no key returned a 401 `UNAUTHORIZED_MISSING_API_KEY` ("No apikey request header or url param was found"), reconfirming API-key auth; both that GET and a separate OPTIONS preflight, each sent with a third-party Origin header, returned a wildcard `access-control-allow-origin: *`, resolving CORS as open. Its pricing page confirms a free tier (500 one-time credits, no card required) above which usage is metered by paid Builder/Team/Agency plans.
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<a href="https://greatapis.com/api/signaliz/"><img src="https://greatapis.com/badge/signaliz.svg" alt="Scored 61 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.