List available Deepgram speech-AI models via pay-per-call MPP endpoint on Tempo L2.
What it does
This endpoint returns a catalog of available Deepgram models (speech-to-text, text-to-speech, and text analysis) through the Locus MPP (Micropayment Protocol) gateway. It is one of four Deepgram endpoints exposed via the Locus MPP proxy, alongside transcription (/deepgram/transcribe), text-to-speech (/deepgram/speak), and text analysis (/deepgram/analyze).
The endpoint uses the MPP charge intent, settling payments in pathUSD on Tempo L2 at $0.004 per call (4,000 base units with 6 decimals). It accepts POST requests with no required body — the response enumerates the models available for use with the sibling endpoints. Models referenced in the OpenAPI spec include Nova-3, Nova-2, Enhanced, and Base for STT, and Aura-2 voices (e.g., aura-2-thalia-en, aura-2-apollo-en, aura-2-orion-en) for TTS.
Note: The probe attempted HEAD and GET methods and received 404 responses; the endpoint is documented as a POST route in the OpenAPI spec, so it is likely live when called with the correct HTTP method. No response schema or example response is provided in the OpenAPI spec, so the exact shape of the model listing is unknown.
Capabilities
Use cases
- —Discovering available Deepgram STT and TTS models before making transcription or speech synthesis calls
- —Building dynamic model selectors in agent workflows that adapt to the current model catalog
- —Validating that a desired model (e.g., nova-3) is available before submitting an audio transcription job
Fit
Best for
- —AI agents that need to enumerate Deepgram model options programmatically
- —Workflows that dynamically select the best STT/TTS model based on availability
- —Developers exploring Deepgram capabilities without needing a direct Deepgram API key
Not for
- —Actual audio transcription or speech synthesis (use sibling /transcribe and /speak endpoints)
- —High-frequency polling — at $0.004 per call, costs accumulate if called repeatedly
Quick start
curl -X POST https://deepgram.mpp.paywithlocus.com/deepgram/list-models \
-H "Content-Type: application/json"Endpoint
Quality
The OpenAPI spec provides clear payment info and documents the endpoint as a POST route, but there is no request or response schema, no example payloads, and the probe only tested HEAD/GET (returning 404) so liveness via POST is unconfirmed. Crawled pages returned no useful documentation.
Warnings
- —Probe returned 404 on HEAD and GET; endpoint is documented as POST-only — liveness via POST is unconfirmed
- —No response schema provided in OpenAPI spec; the shape of the model list is unknown
- —No example request or response available
- —Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD with 6 decimals based on sibling endpoint patterns; if incorrect, the $0.004 price may be wrong
Citations
- —The /deepgram/list-models endpoint uses MPP charge intent with amount 4000 in pathUSD on Tempo L2https://deepgram.mpp.paywithlocus.com
- —The endpoint is documented as a POST route in the OpenAPI spechttps://deepgram.mpp.paywithlocus.com
- —Sibling endpoints include /deepgram/transcribe (Nova-3, Nova-2, Enhanced, Base models), /deepgram/speak (Aura-2 TTS voices), and /deepgram/analyzehttps://deepgram.mpp.paywithlocus.com
- —Deepgram API reference available at developers.deepgram.comhttps://developers.deepgram.com/reference/deepgram-api-overview