Need help with your APIs? I offer API discovery, governance & evangelism services. Explore services →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Deepgram website screenshot

Deepgram

Deepgram is an enterprise voice AI platform that provides speech-to-text, text-to-speech, and voice agent APIs powered by advanced AI models. The platform offers real-time and batch transcription through its Nova model family, natural-sounding speech synthesis through its Aura model family, and an end-to-end Voice Agent API that combines STT, LLM orchestration, and TTS into a single real-time interface.

agent ready

Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.

Kin Score

API Evangelist profiles Deepgram the way a machine reads it — 108 machine-readable artifacts across 12 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Deepgram scores 63.4/100 (strong), with a separate agent-readiness read of 54/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 63.4/100 · strong
Contract Quality 19.1 / 25
Developer Ergonomics 6.1 / 20
Commercial Clarity 14.2 / 20
Operational Transparency 6.2 / 13
Governance 7.9 / 12
Discoverability 10.0 / 10
Agent readiness — 54/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Deepgram

Each block below is one kind of artifact we hold for Deepgram. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 12

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Deepgram Voice Agent API

The Deepgram Voice Agent API is an end-to-end solution that combines speech-to-text, LLM orchestration, and text-to-speech into a single real-time API. It simplifies the develop...

Deepgram Balances API

Retrieve billing balance information for projects.

Deepgram Invitations API

Manage project invitations.

Deepgram Keys API

Create, list, and manage API keys for projects.

Deepgram Members API

Manage project team members.

Deepgram Models API

Retrieve available model metadata.

Deepgram Pre-Recorded API

Transcribe pre-recorded audio files or audio from URLs.

Deepgram Projects API

Manage Deepgram projects and project settings.

Deepgram Scopes API

Manage member scopes and permissions within projects.

Deepgram Text Intelligence API

Analyze text content for summarization, sentiment, topics, and intents.

Deepgram Text-To-Speech API

Convert text into natural-sounding speech audio.

Deepgram Usage API

Retrieve usage data and request logs for projects.

Scroll within the panel for all 12 ·

Postman Collections 3

A runnable collection turns the contract into something a developer can execute in seconds. We profile them because the fastest way to trust an API is to make a real call against it.

Ready-to-run Postman collections for exercising this provider's APIs.

Open Collections 3

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Arazzo Workflows 10

Real integrations are rarely a single call. Arazzo describes the multi-step sequences — auth, then create, then confirm — so both a human and an agent can follow the choreography, not just the endpoints.

Multi-step API workflows described with the Arazzo specification.

Deepgram Audit Project Usage and Billing

Pull a project's details, usage summary, request log, and billing balances into a single audit snapshot.

ARAZZO

Deepgram Balance-Gated Transcription

Check a project's billing balance and only transcribe audio when sufficient credit remains.

ARAZZO

Deepgram Diarized Transcript Intelligence

Transcribe a multi-speaker recording with diarization, then run targeted text intelligence over the transcript.

ARAZZO

Deepgram Invite and Confirm a Project Member

Send a project invitation, confirm it appears in the pending invitation list, and list current members.

ARAZZO

Deepgram Provision a Project API Key

Create a new project, mint a scoped API key for it, and verify the key appears in the project key list.

ARAZZO

Deepgram Rotate a Project API Key

Mint a replacement API key in a project, verify it, then delete the old key to complete a rotation.

ARAZZO

Deepgram Select a Model and Transcribe

Browse available models, read the metadata for a chosen model, then transcribe audio with that model.

ARAZZO

Deepgram Transcribe, Analyze, and Synthesize

Transcribe audio to text, run text intelligence on the transcript, then synthesize a spoken response.

ARAZZO

Deepgram Transcribe Audio and Track Usage

Transcribe a pre-recorded audio URL and then reconcile the request against project usage and request logs.

ARAZZO

Deepgram Update a Member's Scopes

Locate a project member, read their current scopes, update them, and confirm the new scopes took effect.

ARAZZO

Scroll within the panel for all 10 ·

GraphQL 1

Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.

GraphQL schemas published by this provider.

Deepgram GraphQL Schema

This document describes the conceptual GraphQL schema for the Deepgram AI voice platform, covering speech-to-text transcription, text-to-speech synthesis, voice agent capabiliti...

GRAPHQL

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Deepgram Rate Limits

4 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Features 16

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Nova-3 STT: $0.0048/min mono, $0.0058/min multilingual
Flux STT: $0.0065/min English, $0.0078/min multilingual
Aura-1 TTS at $0.015/1k characters
Aura-2 TTS at $0.030/1k characters with studio quality
Streaming and pre-recorded transcription
Speaker diarization, smart formatting
Default 50 streaming concurrent (PAYG), 100 pre-recorded
Voice cloning on Aura models
Voice agents combining STT + LLM + TTS
30+ language support on multilingual models
WebSocket streaming for real-time STT
REST API for pre-recorded files
Audio Intelligence: summarization, topics, sentiment, entities
Custom model training (Enterprise)
Self-hosted on-prem option (Enterprise)
OAuth 2.0 + API keys

Scroll within the panel for all 16 ·

Event Specifications 3

Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Deepgram Speech-to-Text Streaming Events

The Deepgram Speech-to-Text streaming API provides real-time transcription of audio using a WebSocket connection. Audio data is sent as binary WebSocket messages and transcripti...

ASYNCAPI

Deepgram Text-to-Speech Streaming Events

The Deepgram Text-to-Speech streaming API provides real-time speech synthesis over a WebSocket connection. Text is sent as JSON messages and audio data is returned as binary Web...

ASYNCAPI

Deepgram Voice Agent Events

The Deepgram Voice Agent API is an end-to-end solution that combines speech-to-text, LLM orchestration, and text-to-speech into a single real-time WebSocket API. It simplifies b...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Deepgram Context

0 classes · 11 properties

JSON-LD

Spectral Rules 5

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Deepgram API Rules

9 rules · 1 errors · 8 warnings

SPECTRAL

Deepgram API Rules

6 rules · 5 warnings

SPECTRAL

Deepgram API Rules

4 rules · 4 warnings

SPECTRAL

Deepgram API Rules

5 rules · 1 errors · 4 warnings

SPECTRAL

Deepgram API Rules

4 rules · 2 errors · 2 warnings

SPECTRAL

JSON Schema 47

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Alternative

4 properties

JSON SCHEMA

AudioUrlRequest

1 properties

JSON SCHEMA

Balance

4 properties

JSON SCHEMA

BalanceList

1 properties

JSON SCHEMA

Channel

3 properties

JSON SCHEMA

Error

3 properties

JSON SCHEMA

Intent

2 properties

JSON SCHEMA

IntentResults

1 properties

JSON SCHEMA

IntentSegment

4 properties

JSON SCHEMA

Invitation

2 properties

JSON SCHEMA

InvitationCreate

2 properties

JSON SCHEMA

InvitationList

1 properties

JSON SCHEMA

Key

6 properties

JSON SCHEMA

KeyCreate

4 properties

JSON SCHEMA

KeyList

1 properties

JSON SCHEMA

KeyWithSecret

5 properties

JSON SCHEMA

Member

5 properties

JSON SCHEMA

MemberList

1 properties

JSON SCHEMA

Metadata

8 properties

JSON SCHEMA

Model

7 properties

JSON SCHEMA

ModelInfo

3 properties

JSON SCHEMA

ModelList

2 properties

JSON SCHEMA

Paragraph

5 properties

JSON SCHEMA

ParagraphGroup

2 properties

JSON SCHEMA

Project

3 properties

JSON SCHEMA

ProjectList

1 properties

JSON SCHEMA

ProjectUpdate

2 properties

JSON SCHEMA

RequestList

3 properties

JSON SCHEMA

Results

6 properties

JSON SCHEMA

ScopeList

1 properties

JSON SCHEMA

ScopeUpdate

1 properties

JSON SCHEMA

Sentence

3 properties

JSON SCHEMA

SentimentAverage

2 properties

JSON SCHEMA

SentimentResults

2 properties

JSON SCHEMA

SentimentSegment

5 properties

JSON SCHEMA

SpeakRequest

1 properties

JSON SCHEMA

Summary

1 properties

JSON SCHEMA

TextAnalysisRequest

2 properties

JSON SCHEMA

TextAnalysisResponse

2 properties

JSON SCHEMA

Topic

2 properties

JSON SCHEMA

TopicResults

1 properties

JSON SCHEMA

TopicSegment

4 properties

JSON SCHEMA

Deepgram Transcript

2 properties

JSON SCHEMA

TranscriptionResponse

2 properties

JSON SCHEMA

UsageSummary

4 properties

JSON SCHEMA

Utterance

8 properties

JSON SCHEMA

Word

8 properties

JSON SCHEMA

Scroll within the panel for all 47 ·

JSON Structure 1

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Deepgram Structure

0 properties

JSON STRUCTURE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Deepgram Authentication

apiKey/http · 2 schemes

SECURITY

Deepgram Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Deepgram Agentic Access

24 operations · 11 acting

24 operations · 11 acting

AGENTIC

Resources

Every other property we hold for Deepgram — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Documentation 3

Reference material describing how the API behaves

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/deepgram · machine-readable index on apis.io