Glossary
API Key
A unique identifier used to authenticate requests to an API. In e-signature APIs, the API key identifies the sender and bypasses manual email verification.
An API key is a long, random string assigned to your account. You include it in the Authorization header of each request. With Signbee, using an API key means the sender is pre-verified — the recipient receives the signing link immediately without the sender needing to confirm via email OTP.
API keys should be stored securely in environment variables, never committed to source code repositories.
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Further reading
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Try Signbee — e-signatures via API.