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 is listed with 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 17 more developer resources.

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0.0/100 minimal ▬ flat Agent 0/100 human only Heartbeat 0/100 dormant self hosted · MIT Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Company Speech Recognition VoiceSpoken Language UnderstandingSpeech-to-Text Content Moderation Machine Learning gRPC Artificial Intelligence

Kin Score

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

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 19

Developer Ergonomics 0.0 / 15

Access Clarity 0.0 / 15

Operational Transparency 0.0 / 10

Contract Governance 0.0 / 9

Discoverability 0.0 / 8

Regulatory Posture 2.3 / 15

Open Source Surface 0.0 / 10

Agent readiness — 0/100 · human only

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 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

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 Horizontal (data, software, accessibility, platform) 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.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 75 points between them, because both conditional facets apply and carry 25 points together. 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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 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/speechly/apis.yml: open an issue on github.com/api-evangelist/speechly 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
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	distribution	19.2 (thin)	-	-

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.

gRPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

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 ...

Security Posture 2

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

Speechly Authentication

oauth2-like/bearer · 1 scheme

SECURITY

Speechly Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

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

Operate 2

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Releases

Releases

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

ParentCompany

ParentCompany

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.
deliveryModel:
  model: self-hosted
  license: MIT
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - url: http://speechly.com
    status: 301
    note: declared website redirects to https://www.roblox.com:443/ — a different registrable domain (speechly.com -> roblox.com),
      possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-11-06'
  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: '0.23'
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
tags_raw:
- Company
- Speech Recognition
- Voice
- Spoken Language Understanding
- Speech-to-Text
- Content Moderation
- Machine Learning
- gRPC
- Artificial Intelligence
- Machine-Learning
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: ParentCompany
  url: https://apis.io/providers/roblox/
  name: Roblox
  x-relationship: acquired
  x-evidence: Speechly was acquired by Roblox; the standalone product and hosted API have since been discontinued — speechly.
- type: IssueTracker
  url: https://github.com/speechly/api/issues
- type: Releases
  url: https://github.com/speechly/api/releases
- type: License
  name: MIT
  url: https://github.com/speechly/api/blob/master/LICENSE
- 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: X-MCPServerCandidate
  url: mcp/speechly-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: 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

Speechly API — frequently asked questions

Does Speechly have an API?

Yes. APIs.io lists 1 API from Speechly, including Speechly API.

How do I authenticate with the Speechly API?

Speechly uses bearer-token authentication (oauth2-like/bearer · 1 scheme). The details are profiled on APIs.io as Speechly Authentication.

Is the Speechly API ready for AI agents?

Speechly has a Kin Score of 0.0 out of 100 (minimal) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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