# Listnr authentication

## Text-to-speech API

The documented Listnr TTS API uses an API key in the `x-listnr-token` HTTPS request header. The documented base URL is https://bff.listnr.tech/api/tts/v1/. Obtain credentials through your Listnr account; never put API keys in browser code, public repositories, shared links, or an agent prompt. Use a secret store or an environment variable in a server-side integration.

Read the official reference at https://github.com/team-listnr/text-to-speech-api before making requests. Confirm account access and plan limits before generating billable audio. The public website demo has separate abuse controls and is not a substitute for an API credential.

## Studio discovery

https://studio.listnr.ai/mcp exposes product discovery, pricing and documentation tools. This MCP does not generate video. Refer to https://studio.listnr.ai/openapi.json for each Studio API operation and its authentication requirements. TTS API keys must not be sent to unrelated hosts.

## Errors and credential management

Do not repeatedly retry authentication failures. Check the configured key and account access first. Respect rate-limit responses and retry guidance. Manage or revoke credentials through your account; contact support@listnr.ai if you cannot access credential management. This guide does not declare an OAuth authorization server or grant anonymous generation access.