# dTelecom STT Session Extend

> dTelecom STT Session Extend is a free API for AI agents from x402stt.dtelecom.org, Free, status down (last checked 2026-09-15).

Extends an existing real-time speech-to-text session to keep it active beyond its initial duration

## Facts

- Endpoint: POST https://x402stt.dtelecom.org/v1/session/extend
- Price: Free
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dtelecom-stt-89a97e1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8ZmvJ1HvNj_QPBW3uWSVv

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dtelecom-stt-89a97e1b -d '<json body>'
```

Example prompt: My dTelecom STT transcription session is about to expire — can you extend it so my live audio streaming doesn't get cut off?

## When to prefer this

Use this endpoint when you already have an active dTelecom STT session established via WebSocket and need to extend it before it expires, without interrupting the ongoing audio stream and transcription. This is specifically for session lifecycle management, not for creating new sessions or retrieving transcription results.

## Known failure modes

- Session ID not found or already expired — returns 404 or session-not-found error
- Invalid or missing authentication token — returns 401 unauthorized
- Session already at maximum allowed duration — returns limit-exceeded error
- Payment failure if session extension requires additional USDC — returns payment required error
- Network timeout if extension request is not processed in time — session may expire

## How this service works

Real-time speech-to-text

## Output

Returns updated session details including a new expiry timestamp and confirmation that the session has been extended, allowing uninterrupted WebSocket audio streaming and transcription.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dtelecom-stt-89a97e1b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402stt.dtelecom.org](https://www.zero.xyz/host/x402stt.dtelecom.org/llms.txt)