Speko

Speko is a voice-AI gateway - "one API for the whole voice stack." It continuously benchmarks speech-to-text, LLM, and text-to-speech providers and routes every call to the best provider for your language, latency, and cost intent, with transparent server-side failover. Developers ship voice agents in minutes over one REST API (no provider keys required, or bring your own), deploying to phone numbers, web widgets, or one-shot transcribe/synthesize/ complete calls. Speko is a Y Combinator (S26) company based in San Francisco, founded by Beknazar Abdikamalov. The platform advertises SOC 2 Type II, HIPAA, and GDPR posture and ships TypeScript and Python SDKs, a browser SDK, a LiveKit adapter, and a hosted MCP server.

Speko publishes 4 APIs on the APIs.io network, including Agents API, Providers API, Telephony API, and 1 more. Tagged areas include Voice, Voice AI, Speech-to-Text, Text-to-Speech, and LLM.

The Speko catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Speko’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, engineering blog, support, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

50.5/100 developing ▬ flat Agent 61/100 agent native Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

1 APIs 1 MCP Servers

Voice Voice AI Speech-to-Text Text-to-Speech LLM Telephony API Gateway Conversational AI Developer Tools AI Infrastructure

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 50.5/100 · developing

Contract Quality 11.4 / 19

Developer Ergonomics 9.9 / 15

Access Clarity 5.9 / 15

Operational Transparency 2.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.6 / 8

Regulatory Posture 4.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 61/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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/.

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 github.com/api-evangelist/speko: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

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

Speko Agents API

The Agents API from Speko — 2 operation(s) for agents.

Speko Providers API

The Providers API from Speko — 1 operation(s) for providers.

Speko Telephony API

The Telephony API from Speko — 22 operation(s) for telephony.

Speko Voice API

The Voice API from Speko — 8 operation(s) for voice.

Open Collections 5

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

API Collection

OPEN COLLECTION

Speko Agents API

OPEN COLLECTION

Speko Agents Providers API

OPEN COLLECTION

Speko Agents Telephony API

OPEN COLLECTION

Speko Agents Voice API

OPEN COLLECTION

MCP Servers 1

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

Speko MCP Server

MCP SERVER

Event Specifications 1

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

Speko Webhooks

ASYNCAPI

Security Posture 2

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

Speko Authentication

http · 1 scheme

SECURITY

Speko Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Speko Agentic Access

40 operations · 22 acting · 1 human-in-the-loop

40 operations · 22 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

AgentSkill

AgentSkill

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Conformance

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

Compliance

Compliance

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: speko
name: Speko
description: Speko is a voice-AI gateway - "one API for the whole voice stack." It continuously benchmarks speech-to-text,
  LLM, and text-to-speech providers and routes every call to the best provider for your language, latency, and cost intent,
  with transparent server-side failover. Developers ship voice agents in minutes over one REST API (no provider keys required,
  or bring your own), deploying to phone numbers, web widgets, or one-shot transcribe/synthesize/ complete calls. Speko is
  a Y Combinator (S26) company based in San Francisco, founded by Beknazar Abdikamalov. The platform advertises SOC 2 Type
  II, HIPAA, and GDPR posture and ships TypeScript and Python SDKs, a browser SDK, a LiveKit adapter, and a hosted MCP server.
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://speko.ai/favicon.ico
url: https://raw.githubusercontent.com/api-evangelist/speko/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-09-16'
tags:
- Voice
- Voice AI
- Speech-to-Text
- Text-to-Speech
- LLM
- Telephony
- API Gateway
- Conversational AI
- Developer Tools
- AI Infrastructure
tags_raw:
- Voice
- Voice AI
- Speech to Text
- Text to Speech
- LLM
- Telephony
- API Gateway
- Conversational AI
- Developer Tools
- AI Infrastructure
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: speko:speko-agents-api
  name: Speko Agents API
  description: The Agents API from Speko — 2 operation(s) for agents.
  humanURL: https://docs.speko.dev/api-reference/introduction
  baseURL: https://api.speko.dev
  tags:
  - Agents
  properties:
  - type: OpenAPI
    url: openapi/speko-agents-api-openapi.yml
  - type: Authentication
    url: authentication/speko-authentication.yml
  - type: ErrorCatalog
    url: errors/speko-problem-types.yml
  - type: Conventions
    url: conventions/speko-conventions.yml
  - type: Idempotency
    url: conventions/speko-conventions.yml
  - type: DataModel
    url: data-model/speko-data-model.yml
  - type: Webhooks
    url: asyncapi/speko-webhooks.yml
- aid: speko:speko-providers-api
  name: Speko Providers API
  description: The Providers API from Speko — 1 operation(s) for providers.
  humanURL: https://docs.speko.dev/api-reference/introduction
  baseURL: https://api.speko.dev
  tags:
  - Providers
  properties:
  - type: OpenAPI
    url: openapi/speko-providers-api-openapi.yml
  - type: Authentication
    url: authentication/speko-authentication.yml
  - type: ErrorCatalog
    url: errors/speko-problem-types.yml
  - type: Conventions
    url: conventions/speko-conventions.yml
  - type: Idempotency
    url: conventions/speko-conventions.yml
  - type: DataModel
    url: data-model/speko-data-model.yml
  - type: Webhooks
    url: asyncapi/speko-webhooks.yml
- aid: speko:speko-telephony-api
  name: Speko Telephony API
  description: The Telephony API from Speko — 22 operation(s) for telephony.
  humanURL: https://docs.speko.dev/api-reference/introduction
  baseURL: https://api.speko.dev
  tags:
  - Telephony
  properties:
  - type: OpenAPI
    url: openapi/speko-telephony-api-openapi.yml
  - type: Authentication
    url: authentication/speko-authentication.yml
  - type: ErrorCatalog
    url: errors/speko-problem-types.yml
  - type: Conventions
    url: conventions/speko-conventions.yml
  - type: Idempotency
    url: conventions/speko-conventions.yml
  - type: DataModel
    url: data-model/speko-data-model.yml
  - type: Webhooks
    url: asyncapi/speko-webhooks.yml
- aid: speko:speko-voice-api
  name: Speko Voice API
  description: The Voice API from Speko — 8 operation(s) for voice.
  humanURL: https://docs.speko.dev/api-reference/introduction
  baseURL: https://api.speko.dev
  tags:
  - Voice
  properties:
  - type: OpenAPI
    url: openapi/speko-voice-api-openapi.yml
  - type: Authentication
    url: authentication/speko-authentication.yml
  - type: ErrorCatalog
    url: errors/speko-problem-types.yml
  - type: Conventions
    url: conventions/speko-conventions.yml
  - type: Idempotency
    url: conventions/speko-conventions.yml
  - type: DataModel
    url: data-model/speko-data-model.yml
  - type: Webhooks
    url: asyncapi/speko-webhooks.yml
common:
- type: Website
  url: https://speko.dev
- type: Overlay
  url: overlays/speko-openapi-overlay.yaml
- type: DeveloperPortal
  url: https://docs.speko.dev
- type: Documentation
  url: https://docs.speko.dev
- type: APIReference
  url: https://docs.speko.dev/api-reference/introduction
- type: GettingStarted
  url: https://docs.speko.dev/quickstart
- type: Pricing
  url: https://speko.ai/pricing
- type: SignUp
  url: https://platform.speko.dev/sign-in
- type: TermsOfService
  url: https://speko.ai/terms-of-service
- type: PrivacyPolicy
  url: https://speko.ai/privacy-policy
- type: Blog
  url: https://speko.ai/blog
- type: GitHubOrganization
  url: https://github.com/SpekoAI
- type: StatusPage
  url: https://status.speko.ai
- type: Support
  url: mailto:founders@speko.ai
- type: MCPServer
  url: mcp/speko-mcp.yml
- type: Packages
  url: packages/speko-packages.yml
- type: SDKs
  url: packages/speko-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Lifecycle
  url: lifecycle/speko-lifecycle.yml
- type: Conformance
  url: conformance/speko-conformance.yml
- type: Compliance
  url: https://speko.ai/
- type: Authentication
  url: authentication/speko-authentication.yml
- type: AgenticAccess
  url: agentic-access/speko-agentic-access.yml
- type: DomainSecurity
  url: security/speko-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 17
  pass: local-v1

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