# AssemblyAI Speech Models Catalog

> AssemblyAI Speech Models Catalog is a free API for AI agents from AssemblyAI at assemblyai.mpp.tempo.xyz, Free, status unknown (last checked 2026-10-31).

Returns the list of available speech and transcription models with pricing per unit, supported voices, and example requests

## Facts

- Endpoint: GET https://assemblyai.mpp.tempo.xyz/v1/audio/models?utm_source=zero.xyz
- Price: Free
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Provider: AssemblyAI
- Docs: https://openrouter.ai
- Website: https://openrouter.ai
- Tags: ai
- Canonical page: https://www.zero.xyz/c/assemblyai-speech-models-catalog-5070ca60
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_S-ZpU6TwiOUg-Nwjx4j2k

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 assemblyai-speech-models-catalog-5070ca60
```

Example prompt: What AssemblyAI speech and transcription models are available, and how much does each one cost per unit?

## When to prefer this

Use this endpoint when you need to discover available AssemblyAI transcription/speech models and their current pricing before making a transcription call, or when building a UI that lets users select among models. It is the canonical catalog endpoint for this AssemblyAI-via-OpenRouter service.

## Known failure modes

- Service unavailable (5xx) if the upstream OpenRouter or AssemblyAI catalog endpoint is down
- Empty or stale model list if catalog has not been refreshed
- Unexpected schema changes if new models are added without version bump

## How this service works

Speech and transcription models this service prices, with prices per unit, voices and an example request

## Output

A structured list of available speech and transcription models, each with model ID, name, per-unit pricing, supported voices, and an example API request payload demonstrating how to call the model.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/assemblyai-speech-models-catalog-5070ca60/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from assemblyai.mpp.tempo.xyz](https://www.zero.xyz/host/assemblyai.mpp.tempo.xyz/llms.txt)