SLNG

SLNG is a compliance-first speech AI gateway that gives developers a single, unified API for speech-to-text, text-to-speech, and LLM-driven voice agents across 30+ models from providers like Deepgram, Rime, Cartesia, ElevenLabs, and OpenAI Whisper. The platform acts as an execution layer between an orchestrator and the models, routing each request to in-region compute across 60+ regions and 11 sovereign hubs for low latency and local data residency (GDPR), with ISO 27001 certification and HIPAA compliance. Every model is reachable over HTTP or streaming WebSocket, with bring-your-own-key billing, batch transcription, pronunciation dictionaries, and per-minute pricing. Founded in Barcelona in 2025 and backed by a pre-seed round led by Earlybird.

SLNG publishes 15 API contracts indexed on the APIs.io network, including Account API, Agents API, Calls API, and 12 more. Tagged areas include Company, Speech, Voice, Speech-to-Text, and Text-to-Speech.

The SLNG catalog on APIs.io includes 3 event-driven AsyncAPI specifications and 1 Spectral governance ruleset.

SLNG’s developer surface includes documentation, API reference, getting-started guide, engineering blog, signup flow, pricing, support, and 30 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

63.5/100 strong ▬ flat Agent 32/100 agent ready Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

7 published contracts 4 Agent Skills

Company Speech Voice Speech-to-Text Text-to-Speech Voice AI Voice Agents Transcription Speech Recognition Artificial Intelligence API Gateway Real-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 →

Application Communications

AE-150

Calls

POST /v1/agents/{agent_id}/calls

Kin Score

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

Composite quality — 63.5/100 · strong

Contract Quality 11.5 / 19

Developer Ergonomics 12.2 / 15

Access Clarity 14.0 / 15

Operational Transparency 1.8 / 10

Contract Governance 1.6 / 9

Discoverability 5.9 / 8

Regulatory Posture 4.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 0 / 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
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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):

Operational Transparency scores 18.4 — up to +10.6 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Contract Quality scores 61.5 — up to +9.6 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/slng/apis.yml: open an issue on github.com/api-evangelist/slng 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
Speech and Voice AI	covered	26.8 (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.

OpenAPI

measured — observed by APIs.io (published)

APIs 15

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

SLNG Account API

Inspect the authenticated account and organization.

SLNG Agents API

Voice agent CRUD.

SLNG Calls API

Call dispatch and status.

SLNG Catalog API

Discover and inspect available models in the SLNG catalog.

SLNG Deepgram Aura 2 API

Deepgram Aura 2 for conversational voice agents.

SLNG Deepgram Nova 3 API

Deepgram Nova 3 with VAD and speaker diarization.

SLNG Inworld Max 1.5 API

Inworld Max 1.5 for multilingual, expressive synthesis.

SLNG Orpheus English API

Orpheus TTS with emotion control.

SLNG Pronunciation dictionaries API

Manage reusable pronunciation rewrite dictionaries for TTS.

SLNG Rime Arcana v2 API

Rime Arcana v2 TTS with multi-language support.

SLNG Rime Arcana v3 API

Rime Arcana v3 TTS with multilingual support (English, Hindi).

SLNG Rime Coda API

Rime Coda TTS for Bahasa Indonesian.

SLNG Sessions API

Web (non-telephony) sessions.

SLNG Speechmatics API

Create and manage asynchronous transcription jobs.

SLNG Whisper Large v3 API

Whisper Large v3 with 99+ language support.

Scroll for all 15

Postman Collections 15

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

SLNG Voice Agents Account API

POSTMAN

SLNG Voice Account Agents API

POSTMAN

SLNG Voice Agents Account Calls API

POSTMAN

SLNG Voice Agents Account Catalog API

POSTMAN

SLNG Voice Agents Account Deepgram Aura 2 API

POSTMAN

SLNG Voice Agents Account Deepgram Nova 3 API

POSTMAN

SLNG Voice Agents Account Inworld Max 1.5 API

POSTMAN

SLNG Voice Agents Account Orpheus English API

POSTMAN

SLNG Voice Agents Account Pronunciation dictionaries API

POSTMAN

SLNG Voice Agents Account Rime Arcana v2 API

POSTMAN

SLNG Voice Agents Account Rime Arcana v3 API

POSTMAN

SLNG Voice Agents Account Rime Coda API

POSTMAN

SLNG Voice Agents Account Sessions API

POSTMAN

SLNG Voice Agents Account Speechmatics API

POSTMAN

SLNG Voice Agents Account Whisper Large v3 API

POSTMAN

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Open Collections 15

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

SLNG Voice Agents Account API

OPEN COLLECTION

SLNG Voice Account Agents API

OPEN COLLECTION

SLNG Voice Agents Account Calls API

OPEN COLLECTION

SLNG Voice Agents Account Catalog API

OPEN COLLECTION

SLNG Voice Agents Account Deepgram Aura 2 API

OPEN COLLECTION

SLNG Voice Agents Account Deepgram Nova 3 API

OPEN COLLECTION

SLNG Voice Agents Account Inworld Max 1.5 API

OPEN COLLECTION

SLNG Voice Agents Account Orpheus English API

OPEN COLLECTION

SLNG Voice Agents Account Pronunciation dictionaries API

OPEN COLLECTION

SLNG Voice Agents Account Rime Arcana v2 API

OPEN COLLECTION

SLNG Voice Agents Account Rime Arcana v3 API

OPEN COLLECTION

SLNG Voice Agents Account Rime Coda API

OPEN COLLECTION

SLNG Voice Agents Account Sessions API

OPEN COLLECTION

SLNG Voice Agents Account Speechmatics API

OPEN COLLECTION

SLNG Voice Agents Account Whisper Large v3 API

OPEN COLLECTION

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Agent Skills 4

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

Batch transcribe audio with SLNG

AGENT SKILL

Synthesize speech with SLNG TTS

AGENT SKILL

Transcribe audio with SLNG STT

AGENT SKILL

Build and dispatch a SLNG voice agent

AGENT SKILL

SLNG API pricing

Prices published by SLNG, read 2026-10-07 from slng.ai/pricing.

Plan	Price
Default Pay as you go	US$0.001 for SLNG Edge Includes: Prepaid credit — burns down with usage; auto-recharge; community support; best-effort concurrency
Basic Support (optional add-on)	US$199/ month Includes: 24h business-hours email · private ticket queue · priority engineering access
Enterprise	from US$5,000/ month prepaid minimum Includes: Prepaid credit at the same US$ 0.0033 rate; guaranteed concurrency; FDE; SLAs; custom regions
Execution Layer	US$0.001/ agent min Includes: 15 sovereign regions, caching, PII redaction, SOC 2, ISO 27001, HIPAA, GDPR
STT	US$0.003/ agent min Includes: Deepgram, AssemblyAI, Speechmatics, Gladia, Soniox, Whisper, more
LLM	US$0.003/ agent min Includes: GPT-4o, Claude, Gemini, Llama, more; regional semantic cache
TTS	US$0.003/ agent min Includes: Fish.Audio, Cartesia, Savram, Deepgram, Rime, Soniox plus more
Worker + SIP Trunk	US$0.003/ agent min Includes: LiveKit or Pipecat runtime, SIP connectivity 15 regions, PSTN + DID

All 9 plans, limits and sources →

Billed by: agent minute · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Slng Plans Pricing

9 plans

PLANS

Slng Price Estimates

0 plans

PLANS

Service Levels 1

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

SLNG

SLA

FinOps 1

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

Slng Finops

FINOPS

Event Specifications 3

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

SLNG Gateway API - SLNG (WebSocket)

SLNG Gateway API

ASYNCAPI

SLNG Gateway API - SLNG STT

SLNG Gateway API

ASYNCAPI

SLNG Gateway API - SLNG TTS

SLNG Gateway API

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SLNG API Rules

57 rules · 45 errors 8 warnings 4 info

SPECTRAL

OpenAPI Overlays 7

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.

Slng Agents Overlay

1 action · update · slng-agents-openapi.yml

DERIVED

Slng Batch Overlay

1 action · update · slng-batch-openapi.json

DERIVED

Slng Management Overlay

1 action · update · slng-management-slng-openapi.yml

DERIVED

Slng Me Overlay

1 action · update · slng-me-openapi.json

DERIVED

Slng Stt Overlay

1 action · update · slng-stt-slng-openapi.yml

DERIVED

Slng Tts Overlay

1 action · update · slng-tts-slng-openapi.yml

DERIVED

Slng Tts Pronunciation Dictionaries Overlay

1 action · update · slng-tts-pronunciation-dictionaries-openapi.yml

DERIVED

Scroll for all 7

Security Posture 3

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

Slng Authentication

http · 1 scheme

SECURITY

Slng Domain Security

TLSv1.3 · DMARC

SECURITY

Slng Trust Center

ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

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

Slng Agentic Access

43 operations · 31 acting · 1 human-in-the-loop

43 operations · 31 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

Compliance

Authentication

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

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 5

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

Overlay

Overlay

Source (apis.yml)

aid: slng
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
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/slng.png
name: SLNG
description: SLNG is a compliance-first speech AI gateway that gives developers a single, unified API for speech-to-text,
  text-to-speech, and LLM-driven voice agents across 30+ models from providers like Deepgram, Rime, Cartesia, ElevenLabs,
  and OpenAI Whisper. The platform acts as an execution layer between an orchestrator and the models, routing each request
  to in-region compute across 60+ regions and 11 sovereign hubs for low latency and local data residency (GDPR), with ISO
  27001 certification and HIPAA compliance. Every model is reachable over HTTP or streaming WebSocket, with bring-your-own-key
  billing, batch transcription, pronunciation dictionaries, and per-minute pricing. Founded in Barcelona in 2025 and backed
  by a pre-seed round led by Earlybird.
url: https://raw.githubusercontent.com/api-evangelist/slng/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- earlybird
x-tier: producer
x-tier-reason: enriched-from-live-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Speech
- Voice
- Speech-to-Text
- Text-to-Speech
- Voice AI
- Voice Agents
- Transcription
- Speech Recognition
- Artificial Intelligence
- API Gateway
- Real-Time
tags_raw:
- Company
- Speech
- Voice
- Speech to Text
- Text to Speech
- Voice AI
- Voice Agents
- Transcription
- Speech Recognition
- Artificial Intelligence
- API Gateway
- Real-Time
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: slng:slng-account-api
  name: SLNG Account API
  description: Inspect the authenticated account and organization.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/slng-account-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-agents-api
  name: SLNG Agents API
  description: Voice agent CRUD.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Agents
  properties:
  - type: OpenAPI
    url: openapi/slng-agents-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-calls-api
  name: SLNG Calls API
  description: Call dispatch and status.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Calls
  properties:
  - type: OpenAPI
    url: openapi/slng-calls-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-catalog-api
  name: SLNG Catalog API
  description: Discover and inspect available models in the SLNG catalog.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/slng-catalog-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-deepgram-aura-2-api
  name: SLNG Deepgram Aura 2 API
  description: Deepgram Aura 2 for conversational voice agents.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Deepgram Aura 2
  properties:
  - type: OpenAPI
    url: openapi/slng-deepgram-aura-2-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-deepgram-nova-3-api
  name: SLNG Deepgram Nova 3 API
  description: Deepgram Nova 3 with VAD and speaker diarization.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Deepgram Nova 3
  properties:
  - type: OpenAPI
    url: openapi/slng-deepgram-nova-3-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-inworld-max-1-5-api
  name: SLNG Inworld Max 1.5 API
  description: Inworld Max 1.5 for multilingual, expressive synthesis.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Inworld Max 1.5
  properties:
  - type: OpenAPI
    url: openapi/slng-inworld-max-1-5-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-orpheus-english-api
  name: SLNG Orpheus English API
  description: Orpheus TTS with emotion control.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Orpheus English
  properties:
  - type: OpenAPI
    url: openapi/slng-orpheus-english-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-pronunciation-dictionaries-api
  name: SLNG Pronunciation dictionaries API
  description: Manage reusable pronunciation rewrite dictionaries for TTS.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Pronunciation Dictionaries
  tags_raw:
  - Pronunciation dictionaries
  properties:
  - type: OpenAPI
    url: openapi/slng-pronunciation-dictionaries-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-rime-arcana-v2-api
  name: SLNG Rime Arcana v2 API
  description: Rime Arcana v2 TTS with multi-language support.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Rime Arcana v2
  properties:
  - type: OpenAPI
    url: openapi/slng-rime-arcana-v2-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-rime-arcana-v3-api
  name: SLNG Rime Arcana v3 API
  description: Rime Arcana v3 TTS with multilingual support (English, Hindi).
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Rime Arcana v3
  properties:
  - type: OpenAPI
    url: openapi/slng-rime-arcana-v3-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-rime-coda-api
  name: SLNG Rime Coda API
  description: Rime Coda TTS for Bahasa Indonesian.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Rime Coda
  properties:
  - type: OpenAPI
    url: openapi/slng-rime-coda-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-sessions-api
  name: SLNG Sessions API
  description: Web (non-telephony) sessions.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/slng-sessions-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-speechmatics-api
  name: SLNG Speechmatics API
  description: Create and manage asynchronous transcription jobs.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Speechmatics
  properties:
  - type: OpenAPI
    url: openapi/slng-speechmatics-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
- aid: slng:slng-whisper-large-v3-api
  name: SLNG Whisper Large v3 API
  description: Whisper Large v3 with 99+ language support.
  humanURL: https://docs.slng.ai
  baseURL: https://api.slng.ai
  tags:
  - Whisper Large v3
  properties:
  - type: OpenAPI
    url: openapi/slng-whisper-large-v3-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-stt-slng-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/slng-tts-slng-asyncapi.yml
common:
- type: CapabilityMap
  url: capabilities/slng-capability-edges.yml
  name: SLNG Business Capability Map
- type: Plans
  url: plans/slng-plans-pricing.yml
- type: Website
  url: https://www.slng.ai/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/slng/overview
- type: DeveloperPortal
  url: https://docs.slng.ai
- type: Documentation
  url: https://docs.slng.ai
- type: APIReference
  url: https://docs.slng.ai/api-reference/overview
- type: GettingStarted
  url: https://docs.slng.ai/getting-started
- type: Blog
  url: https://slng.ai/blog
- type: GitHubOrganization
  url: https://github.com/slng-ai
- type: SignUp
  url: https://app.slng.ai
- type: Pricing
  url: https://slng.ai/pricing
- type: TermsOfService
  url: https://slng.ai/legal/terms-of-service
- type: PrivacyPolicy
  url: https://slng.ai/legal/privacy-policy
- type: Support
  url: mailto:support@slng.ai
- type: ChangeLog
  url: changelog/slng-changelog.yml
- type: TrustCenter
  url: https://trust.slng.ai
- type: Compliance
  url: security/slng-trust-center.yml
- type: Authentication
  url: authentication/slng-authentication.yml
- type: DomainSecurity
  url: security/slng-domain-security.yml
- type: AgenticAccess
  url: agentic-access/slng-agentic-access.yml
- type: Packages
  url: packages/slng-packages.yml
- type: SDKs
  url: packages/slng-packages.yml
- type: CLI
  url: cli/slng-cli.yml
- type: X-MCPServerCandidate
  url: mcp/slng-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: LLMsTxt
  url: llms/slng-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Conventions
  url: conventions/slng-conventions.yml
- type: ErrorCatalog
  url: errors/slng-problem-types.yml
- type: Lifecycle
  url: lifecycle/slng-lifecycle.yml
- type: Sandbox
  url: sandbox/slng-sandbox.yml
- type: DataModel
  url: data-model/slng-data-model.yml
- type: Conformance
  url: conformance/slng-conformance.yml
- type: Overlay
  url: overlays/slng-stt-overlay.yaml
- type: Overlay
  url: overlays/slng-tts-overlay.yaml
- type: Overlay
  url: overlays/slng-agents-overlay.yaml
- type: Overlay
  url: overlays/slng-batch-overlay.yaml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 38
  pass: local-v1

SLNG API — frequently asked questions

Does SLNG have an API?

Yes. APIs.io lists 15 APIs from SLNG, including SLNG Account API, SLNG Agents API and SLNG Calls API, and 12 more.

Is there an OpenAPI specification for the SLNG API?

Yes. APIs.io indexes 15 OpenAPI specifications for SLNG, each linked for download from this page.

How do I authenticate with the SLNG API?

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

How much does the SLNG API cost?

SLNG publishes its prices; its Default Pay as you go plan is US$0.001 for SLNG Edge as of 2026-10-07. APIs.io lists 9 pricing plans for SLNG, with each plan's price, limits and inclusions under Pricing on this page.

Is the SLNG API ready for AI agents?

SLNG has a Kin Score of 63.5 out of 100 (strong) and an Agent Readiness score of 32.1 (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.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
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.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/slng"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/slng/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/slng/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

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