Speechly

Speechly was a real-time spoken language understanding (SLU) and streaming speech recognition platform from a Finnish startup, offering low-latency voice transcription, intent/entity parsing, written language understanding (WLU), batch audio processing, and audio/text moderation through a gRPC API with browser, React, iOS, Unity/.NET, Python and Go client SDKs and a command-line interface. Speechly was acquired by Roblox; the standalone product and hosted API have since been discontinued — speechly.com now redirects to roblox.com, the api.speechly.com and docs.speechly.com hosts no longer resolve, and the github.com/speechly organization was archived on 2025-01-07. Its open-source client SDKs and protobuf/gRPC API definitions remain publicly available and are cataloged here by the API Evangelist enrichment pipeline.

Speechly publishes 1 API on the APIs.io network. Tagged areas include Company, Speech Recognition, Voice, Spoken Language Understanding, and Speech-to-Text.

Speechly’s developer surface includes CLI, authentication, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.5/100 emerging ▬ flat Agent 21/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

1 APIs 1 MCP Servers

CompanySpeech RecognitionVoiceSpoken Language UnderstandingSpeech-to-TextContent ModerationMachine LearninggRPCArtificial Intelligence

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 16.5/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 6.5 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/speechly: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

Speechly API

Speechly's gRPC API surface: Identity (access tokens), SLU (streaming spoken language understanding), WLU (written language understanding), Batch audio processing, Config/Model ...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conformance

Lifecycle

DataModel

Conventions

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Protobuf

Protobuf

Source (apis.yml)

aid: speechly
name: Speechly
description: Speechly was a real-time spoken language understanding (SLU) and streaming speech recognition platform from a
  Finnish startup, offering low-latency voice transcription, intent/entity parsing, written language understanding (WLU),
  batch audio processing, and audio/text moderation through a gRPC API with browser, React, iOS, Unity/.NET, Python and Go
  client SDKs and a command-line interface. Speechly was acquired by Roblox; the standalone product and hosted API have since
  been discontinued — speechly.com now redirects to roblox.com, the api.speechly.com and docs.speechly.com hosts no longer
  resolve, and the github.com/speechly organization was archived on 2025-01-07. Its open-source client SDKs and protobuf/gRPC
  API definitions remain publicly available and are cataloged here by the API Evangelist enrichment pipeline.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/25465412?v=4
url: https://raw.githubusercontent.com/api-evangelist/speechly/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- seedcamp
x-tier: stub
x-tier-reason: portfolio-lead
x-status: discontinued
x-acquired-by: roblox
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Speech Recognition
- Voice
- Spoken Language Understanding
- Speech-to-Text
- Content Moderation
- Machine Learning
- gRPC
- Artificial Intelligence
apis:
- name: Speechly API
  description: 'Speechly''s gRPC API surface: Identity (access tokens), SLU (streaming spoken language understanding), WLU
    (written language understanding), Batch audio processing, Config/Model management, Analytics, and audio/text Moderation.
    The hosted service has been discontinued; protobuf definitions are retained verbatim under grpc/.'
  humanURL: https://github.com/speechly/api
  baseURL: https://api.speechly.com
  x-status: discontinued
  properties:
  - type: Protobuf
    url: grpc/_index.yml
  - type: Authentication
    url: authentication/speechly-authentication.yml
  - type: Conformance
    url: conformance/speechly-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: http://speechly.com
- type: GitHubOrganization
  url: https://github.com/speechly
- type: SourceCode
  url: https://github.com/speechly/api
- type: Packages
  url: packages/speechly-packages.yml
- type: SDKs
  url: packages/speechly-packages.yml
- type: CLI
  url: cli/speechly-cli.yml
- type: Protobuf
  url: grpc/_index.yml
- type: Authentication
  url: authentication/speechly-authentication.yml
- type: Conformance
  url: conformance/speechly-conformance.yml
- type: Lifecycle
  url: lifecycle/speechly-lifecycle.yml
- type: DomainSecurity
  url: security/speechly-domain-security.yml
- type: LLMsTxt
  url: llms/speechly-llms.txt
- type: MCPServer
  url: mcp/speechly-mcp.yml
- type: DataModel
  url: data-model/speechly-data-model.yml
- type: Conventions
  url: conventions/speechly-conventions.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 3
  pass: local-v1