Modulate

Modulate is a voice AI company based in Cambridge, Massachusetts, building audio-native voice intelligence for trust, safety, and conversation understanding. Its Velma-2 platform exposes a suite of REST (batch) and WebSocket (streaming) model APIs — multilingual and English speech-to-text transcription with speaker diarization, deepfake (synthetic voice) detection, emotion and accent detection, PII/PHI tagging and redaction, language detection, and music/speech and AI-music detection — alongside Velma conversation analysis (behaviors, topics, sentiment, participant roles) and the ToxMod voice-safety product for gaming and social platforms. Authentication is via an X-API-Key header (an api_key query parameter for WebSocket streams), billed per hour of audio processed. Backed by Sierra Ventures.

Modulate publishes 11 API contracts indexed on the APIs.io network, including Velma 2 Accent Batch API, Velma 2 Ai Music Detection Batch API, Velma 2 Batch API, and 8 more. Tagged areas include Company, Artificial Intelligence, Voice AI, Speech-to-Text, and Transcription.

The Modulate catalog on APIs.io includes 7 event-driven AsyncAPI specifications and 1 Spectral governance ruleset.

Modulate’s developer surface includes authentication, documentation, API reference, getting-started guide, support, engineering blog, pricing, and 24 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

64.8/100 strong ▬ flat Agent 32/100 agent ready Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

11 published contracts 3 Agent Skills

Company Artificial Intelligence Voice AI Speech-to-Text Transcription Deepfake Detection Content Moderation Trust and Safety Audio Machine LearningPII RedactionVoice IntelligenceReal-Time

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

AI Model Services

AE-110

Velma 2 Batch

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 64.8/100 · strong

Contract Quality 11.2 / 19

Developer Ergonomics 9.9 / 15

Access Clarity 15.0 / 15

Operational Transparency 3.3 / 10

Contract Governance 2.9 / 9

Discoverability 5.9 / 8

Regulatory Posture 3.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 59.5 — up to +10.1 composite points
Operational Transparency scores 34.2 — up to +8.6 composite points
Contract Governance scores 31.8 — up to +8.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/modulate/apis.yml: open an issue on github.com/api-evangelist/modulate to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Biometrics Testing (biometric recognition vendors, identity verification depth)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 11

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

Modulate Velma 2 Accent Batch API

The Velma 2 Accent Batch API from Modulate — 1 operation(s) for velma 2 accent batch.

Modulate Velma 2 Ai Music Detection Batch API

The Velma 2 Ai Music Detection Batch API from Modulate — 1 operation(s) for velma 2 ai music detection batch.

Modulate Velma 2 Batch API

The Velma 2 Batch API from Modulate — 2 operation(s) for velma 2 batch.

Modulate Velma 2 Emotion Batch API

The Velma 2 Emotion Batch API from Modulate — 1 operation(s) for velma 2 emotion batch.

Modulate Velma 2 Language Detection Batch API

The Velma 2 Language Detection Batch API from Modulate — 1 operation(s) for velma 2 language detection batch.

Modulate Velma 2 Music Detection Batch API

The Velma 2 Music Detection Batch API from Modulate — 1 operation(s) for velma 2 music detection batch.

Modulate Velma 2 Pii Phi Redaction Batch API

The Velma 2 Pii Phi Redaction Batch API from Modulate — 1 operation(s) for velma 2 pii phi redaction batch.

Modulate Velma 2 Stt Batch API

The Velma 2 Stt Batch API from Modulate — 1 operation(s) for velma 2 stt batch.

Modulate Velma 2 Stt Batch English Vfast API

The Velma 2 Stt Batch English Vfast API from Modulate — 1 operation(s) for velma 2 stt batch english vfast.

Modulate Velma 2 Stt Batch Multilingual Vfast API

The Velma 2 Stt Batch Multilingual Vfast API from Modulate — 1 operation(s) for velma 2 stt batch multilingual vfast.

Modulate Velma 2 Synthetic Voice Detection Batch API

The Velma 2 Synthetic Voice Detection Batch API from Modulate — 1 operation(s) for velma 2 synthetic voice detection batch.

Scroll for all 11

Open Collections 11

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

Velma 2 Accent Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Ai Music Detection Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Emotion Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Language Detection Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Music Detection Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Pii Phi Redaction Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Stt Batch API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Stt Batch English Vfast API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Stt Batch Multilingual Vfast API

OPEN COLLECTION

Velma 2 Accent Batch Velma 2 Synthetic Voice Detection Batch API

OPEN COLLECTION

Scroll for all 11

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Analyze a voice conversation with Velma-2

AGENT SKILL

Detect deepfake (synthetic) voice

AGENT SKILL

Transcribe audio and redact PII/PHI

AGENT SKILL

Modulate API pricing

Prices published by Modulate, read 2026-10-07 from www.modulate.ai/api-pricing.

Plan	Price
Pay-As-You-Go	$1.00 Includes: Inluded Credits / Year -
Starter	$30K Annual Commitment Includes: Inluded Credits / Year 3,060,000; Per 100 Credits $0.98; Save 2%; Uptime 98.0%; Concurrent Channels
Growth	$180K Annual Commitment Includes: Inluded Credits / Year 18,900,000; Per 100 Credits $0.95; Save 5%; Uptime 99.0%; Concurrent Channels
Enterprise	$450K Annual Commitment Includes: Inluded Credits / Year 49,500,000; Per 100 Credits $0.90; Save 10%; Uptime 99.9%; Concurrent Channel
Custom	Let's talk Includes: Customized for you; Uptime 99.9%; Response 4 hours; Concurrent Channels 10,000+
English Fast Speech-to-Text (batch)	$0.025 per hour of audio (REST batch)
English Fast Speech-to-Text (streaming)	$0.05 per hour of audio (WebSocket streaming)
Multilingual Speech-to-Text (batch)	$0.03 per hour of audio (REST batch)

All 18 plans, limits and sources →

Billed by: annual commitment · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Modulate Plans Pricing

18 plans

PLANS

Modulate Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Modulate Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Modulate

SLA

FinOps 1

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

Modulate Finops

FINOPS

Event Specifications 7

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

Velma 2 AI Music Detection Streaming API

Real-time AI music detection over WebSocket. The client streams audio and receives per-window vocal AI verdicts as they become available, followed by a final clip-level summary ...

ASYNCAPI

Velma 2 Music Detection Streaming API

Real-time frame-level music and speech classification over WebSocket. The client streams audio and receives per-frame probabilities as they become available, followed by a final...

ASYNCAPI

Velma 2 PII/PHI Redaction Streaming API

Real-time speech-to-text with PII/PHI redaction over WebSocket. Provides live transcription with automatic language detection, PII/PHI detection and text redaction, and a redact...

ASYNCAPI

Velma 2 STT Streaming API

Real-time speech-to-text over WebSocket. Provides live multilingual transcription with automatic per-utterance language detection, delivering each utterance as it is completed. ...

ASYNCAPI

Velma 2 STT Streaming English v2 API

Low-latency English speech-to-text over WebSocket. Pure transcription only - no diarization, emotion detection, accent detection, or PII/PHI tagging. Streams interim partial tra...

ASYNCAPI

Velma 2 Synthetic Voice Detection Streaming API

Real-time synthetic voice detection for single-speaker audio over WebSocket. The client streams audio and receives per-frame verdicts as they become available.

ASYNCAPI

Modulate Velma-2 Streaming Server

Streaming velma-2 over WebSocket. Transcribes and analyzes a live audio stream against a client-supplied analysis configuration, emitting JSON events that describe clips and ana...

ASYNCAPI

Scroll for all 7

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Modulate API Rules

53 rules · 42 errors 9 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Modulate Velma 2 Batch Overlay

2 actions · update · velma-2-batch-openapi-original.yml

DERIVED

Security Posture 3

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

Modulate Authentication

apiKey · 1 scheme

SECURITY

Modulate Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Modulate Trust Center

SOC 2, ISO 27001, GDPR

SECURITY

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

Compliance

DomainSecurity

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: modulate
name: Modulate
description: Modulate is a voice AI company based in Cambridge, Massachusetts, building audio-native voice intelligence for
  trust, safety, and conversation understanding. Its Velma-2 platform exposes a suite of REST (batch) and WebSocket (streaming)
  model APIs — multilingual and English speech-to-text transcription with speaker diarization, deepfake (synthetic voice)
  detection, emotion and accent detection, PII/PHI tagging and redaction, language detection, and music/speech and AI-music
  detection — alongside Velma conversation analysis (behaviors, topics, sentiment, participant roles) and the ToxMod voice-safety
  product for gaming and social platforms. Authentication is via an X-API-Key header (an api_key query parameter for WebSocket
  streams), billed per hour of audio processed. Backed by Sierra Ventures.
url: https://raw.githubusercontent.com/api-evangelist/modulate/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://cdn.prod.website-files.com/67ed675f8e30d86d14c51adb/6a0c34c788a0bb22111adc3a_Modulate%20Thumbnail%20master.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- sierra-ventures
x-tier: profiled
x-tier-reason: enriched-from-portfolio-lead
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 36
  pass: local-v1
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Artificial Intelligence
- Voice AI
- Speech-to-Text
- Transcription
- Deepfake Detection
- Content Moderation
- Trust and Safety
- Audio
- Machine Learning
- PII Redaction
- Voice Intelligence
- Real-Time
tags_raw:
- Company
- Ai
- Voice AI
- Speech to Text
- Transcription
- Deepfake Detection
- Content Moderation
- Trust and Safety
- Audio
- Machine Learning
- PII Redaction
- Voice Intelligence
- Machine-Learning
- Real-Time
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: modulate:modulate-velma-2-accent-batch-api
  name: Modulate Velma 2 Accent Batch API
  description: The Velma 2 Accent Batch API from Modulate — 1 operation(s) for velma 2 accent batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Accent Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-accent-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-ai-music-detection-batch-api
  name: Modulate Velma 2 Ai Music Detection Batch API
  description: The Velma 2 Ai Music Detection Batch API from Modulate — 1 operation(s) for velma 2 ai music detection batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Ai Music Detection Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-ai-music-detection-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-batch-api
  name: Modulate Velma 2 Batch API
  description: The Velma 2 Batch API from Modulate — 2 operation(s) for velma 2 batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-emotion-batch-api
  name: Modulate Velma 2 Emotion Batch API
  description: The Velma 2 Emotion Batch API from Modulate — 1 operation(s) for velma 2 emotion batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Emotion Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-emotion-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-language-detection-batch-api
  name: Modulate Velma 2 Language Detection Batch API
  description: The Velma 2 Language Detection Batch API from Modulate — 1 operation(s) for velma 2 language detection batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Language Detection Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-language-detection-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-music-detection-batch-api
  name: Modulate Velma 2 Music Detection Batch API
  description: The Velma 2 Music Detection Batch API from Modulate — 1 operation(s) for velma 2 music detection batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Music Detection Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-music-detection-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-pii-phi-redaction-batch-api
  name: Modulate Velma 2 Pii Phi Redaction Batch API
  description: The Velma 2 Pii Phi Redaction Batch API from Modulate — 1 operation(s) for velma 2 pii phi redaction batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Pii Phi Redaction Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-pii-phi-redaction-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-stt-batch-api
  name: Modulate Velma 2 Stt Batch API
  description: The Velma 2 Stt Batch API from Modulate — 1 operation(s) for velma 2 stt batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Stt Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-stt-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-stt-batch-english-vfast-api
  name: Modulate Velma 2 Stt Batch English Vfast API
  description: The Velma 2 Stt Batch English Vfast API from Modulate — 1 operation(s) for velma 2 stt batch english vfast.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Stt Batch English Vfast
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-stt-batch-english-vfast-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-stt-batch-multilingual-vfast-api
  name: Modulate Velma 2 Stt Batch Multilingual Vfast API
  description: The Velma 2 Stt Batch Multilingual Vfast API from Modulate — 1 operation(s) for velma 2 stt batch multilingual
    vfast.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Stt Batch Multilingual Vfast
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-stt-batch-multilingual-vfast-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
- aid: modulate:modulate-velma-2-synthetic-voice-detection-batch-api
  name: Modulate Velma 2 Synthetic Voice Detection Batch API
  description: The Velma 2 Synthetic Voice Detection Batch API from Modulate — 1 operation(s) for velma 2 synthetic voice
    detection batch.
  humanURL: https://docs.modulate.ai/api-reference/velma/overview
  baseURL: https://platform.modulate.ai
  tags:
  - Velma 2 Synthetic Voice Detection Batch
  properties:
  - type: OpenAPI
    url: openapi/modulate-velma-2-synthetic-voice-detection-batch-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/velma/overview
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/modulate-stt-streaming-english-v2-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/stt/overview
  - type: AsyncAPI
    url: asyncapi/modulate-synthetic-voice-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/svd/overview
  - type: AsyncAPI
    url: asyncapi/modulate-pii-phi-redaction-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/redaction/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/emotion/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/accent/overview
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/language-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/music-detection/overview
  - type: AsyncAPI
    url: asyncapi/modulate-ai-music-detection-streaming-asyncapi.yml
  - type: Documentation
    url: https://docs.modulate.ai/api-reference/ai-music-detection/overview
common:
- type: CapabilityMap
  url: capabilities/modulate-capability-edges.yml
  name: Modulate Business Capability Map
- type: Plans
  url: plans/modulate-plans-pricing.yml
- type: Overlay
  url: overlays/modulate-velma-2-batch-overlay.yaml
- type: TrustCenter
  url: security/modulate-trust-center.yml
- type: Compliance
  url: https://www.modulate.ai/compliance
- type: DomainSecurity
  url: security/modulate-domain-security.yml
- type: Authentication
  url: authentication/modulate-authentication.yml
- type: Website
  url: https://modulate.ai/
- type: DeveloperPortal
  url: https://docs.modulate.ai/
- type: Documentation
  url: https://docs.modulate.ai/
- type: APIReference
  url: https://docs.modulate.ai/api-reference/velma/overview
- type: GettingStarted
  url: https://docs.modulate.ai/quickstart
- type: Support
  url: https://docs.modulate.ai/support
- type: Blog
  url: https://www.modulate.ai/blog
- type: Pricing
  url: https://www.modulate.ai/api-pricing
- type: SignUp
  url: https://platform.modulate.ai/signup-request
- type: Login
  url: https://platform.modulate.ai/dashboard/api-keys
- type: TermsOfService
  url: https://www.modulate.ai/terms-and-conditions
- type: PrivacyPolicy
  url: https://www.modulate.ai/privacy-policy
- type: GitHubOrganization
  url: https://github.com/modulateai
- type: LLMsTxt
  url: llms/modulate-llms.txt
- type: X-MCPServerCandidate
  url: mcp/modulate-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Conventions
  url: conventions/modulate-conventions.yml
- type: ErrorCatalog
  url: errors/modulate-error-codes.yml
- type: Lifecycle
  url: lifecycle/modulate-lifecycle.yml
- type: Conformance
  url: conformance/modulate-conformance.yml
- type: DataModel
  url: data-model/modulate-data-model.yml
- type: Sandbox
  url: sandbox/modulate-sandbox.yml
- type: RateLimits
  url: rate-limits/modulate-rate-limits.yml
- type: AsyncAPI
  url: asyncapi/modulate-velma-2-streaming-asyncapi.yml
- type: AgentSkill
  url: skills/_index.yml

Modulate API — frequently asked questions

Does Modulate have an API?

Yes. APIs.io lists 11 APIs from Modulate, including Modulate Velma 2 Accent Batch API, Modulate Velma 2 Ai Music Detection Batch API and Modulate Velma 2 Batch API, and 8 more.

Is there an OpenAPI specification for the Modulate API?

Yes. APIs.io indexes 11 OpenAPI specifications for Modulate, each linked for download from this page.

How do I authenticate with the Modulate API?

Modulate uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Modulate Authentication.

How much does the Modulate API cost?

Modulate publishes its prices; its Pay-As-You-Go plan is $1.00 as of 2026-10-07. APIs.io lists 18 pricing plans for Modulate, with each plan's price, limits and inclusions under Pricing on this page.

Is the Modulate API ready for AI agents?

Modulate has a Kin Score of 64.8 out of 100 (strong) and an Agent Readiness score of 32.2 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

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https://apis.io/mcp

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9 MCP tools reach this

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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