Telefoon

Telefoon is a cloud telephony and communications platform offering programmable voice, SMS, and number management APIs tailored for European markets. Built for GDPR compliance and EU regulatory requirements, Telefoon provides developers with REST APIs to build voice calling, SMS notification, number provisioning, and interactive voice response (IVR) solutions. The platform supports Dutch, Belgian, German, and broader European telecommunications infrastructure with local number availability and EU data residency.

Telefoon publishes 5 APIs on the APIs.io network, including Available Numbers API, Calls API, Conferences API, and 2 more. Tagged areas include Belgium, CPaaS, EU Data Residency, Europe, and GDPR Compliant.

The Telefoon catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Telefoon’s developer surface includes authentication, getting-started guide, pricing, support, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
50.8/100 developing ▼ -6.1 Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessEnterpriseSelf serve
5 APIs
BelgiumCPaaSEU Data ResidencyEuropeGDPR CompliantMessagingNetherlandsNumber ProvisioningSMSTelephonyVoice

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 50.8/100 · developing
Contract Quality 15.9 / 25
Developer Ergonomics 5.7 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 4.8 / 13
Governance 7.0 / 12
Discoverability 8.2 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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 7 / 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
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/telefoon: 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 5

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

Telefoon Available Numbers API

Search available numbers

Telefoon Calls API

Make and manage voice calls

Telefoon Conferences API

Multi-party conferencing

Telefoon Messages API

Send and receive SMS messages

Telefoon Owned Numbers API

Manage owned numbers

Open Collections 3

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

Telefoon Number Management API

OPEN COLLECTION

Telefoon SMS API

OPEN COLLECTION

Telefoon Voice API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Telefoon Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Telefoon Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Telefoon Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Telefoon Context

4 classes · 18 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Telefoon API Rules

5 rules · 4 warnings 1 info

SPECTRAL

Telefoon API Rules

9 rules · 3 errors 5 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Telefoon Call

10 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Telefoon Call Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Telefoon Initiate Call Example

2 fields

EXAMPLE

Telefoon Send Sms Example

2 fields

EXAMPLE

Security Posture 2

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

Telefoon Authentication

apiKey · 1 scheme

SECURITY

Telefoon Domain Security

DNSSEC

SECURITY

Agentic Access 1

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

Telefoon Agentic Access

15 operations · 7 acting

15 operations · 7 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 Authentication
Authentication
 GDPR
GDPR

Operate 3

Status, limits, changes, and where to get help

RateLimits
RateLimits
 StatusPage
StatusPage
 Support
Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Company 1

The organization behind the API

Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
name: Telefoon
description: Telefoon is a cloud telephony and communications platform offering programmable voice, SMS, and number management
  APIs tailored for European markets. Built for GDPR compliance and EU regulatory requirements, Telefoon provides developers
  with REST APIs to build voice calling, SMS notification, number provisioning, and interactive voice response (IVR) solutions.
  The platform supports Dutch, Belgian, German, and broader European telecommunications infrastructure with local number availability
  and EU data residency.
accessModel:
  pricing: enterprise
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Enterprise · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://www.telefoon.com/logo.png
url: https://www.telefoon.com
type: Index
tags:
- Belgium
- CPaaS
- EU Data Residency
- Europe
- GDPR Compliant
- Messaging
- Netherlands
- Number Provisioning
- SMS
- Telephony
- Voice
created: '2024-01-01'
modified: '2026-05-19'
apis:
- aid: telefoon:telefoon-available-numbers-api
  name: Telefoon Available Numbers API
  description: Search available numbers
  humanURL: https://developers.telefoon.com/voice
  baseURL: https://api.telefoon.com/v1/voice
  tags:
  - Available Numbers
  properties:
  - type: OpenAPI
    url: openapi/telefoon-available-numbers-api-openapi.yml
  - type: Documentation
    url: https://developers.telefoon.com/voice
  - type: Authentication
    url: https://developers.telefoon.com/authentication
  - type: GettingStarted
    url: https://developers.telefoon.com/getting-started
  - type: RateLimits
    url: https://developers.telefoon.com/rate-limits
  - type: Documentation
    url: https://developers.telefoon.com/sms
  - type: Documentation
    url: https://developers.telefoon.com/numbers
- aid: telefoon:telefoon-calls-api
  name: Telefoon Calls API
  description: Make and manage voice calls
  humanURL: https://developers.telefoon.com/voice
  baseURL: https://api.telefoon.com/v1/voice
  tags:
  - Calls
  properties:
  - type: OpenAPI
    url: openapi/telefoon-calls-api-openapi.yml
  - type: Documentation
    url: https://developers.telefoon.com/voice
  - type: Authentication
    url: https://developers.telefoon.com/authentication
  - type: GettingStarted
    url: https://developers.telefoon.com/getting-started
  - type: RateLimits
    url: https://developers.telefoon.com/rate-limits
  - type: Documentation
    url: https://developers.telefoon.com/sms
  - type: Documentation
    url: https://developers.telefoon.com/numbers
- aid: telefoon:telefoon-conferences-api
  name: Telefoon Conferences API
  description: Multi-party conferencing
  humanURL: https://developers.telefoon.com/voice
  baseURL: https://api.telefoon.com/v1/voice
  tags:
  - Conferences
  properties:
  - type: OpenAPI
    url: openapi/telefoon-conferences-api-openapi.yml
  - type: Documentation
    url: https://developers.telefoon.com/voice
  - type: Authentication
    url: https://developers.telefoon.com/authentication
  - type: GettingStarted
    url: https://developers.telefoon.com/getting-started
  - type: RateLimits
    url: https://developers.telefoon.com/rate-limits
  - type: Documentation
    url: https://developers.telefoon.com/sms
  - type: Documentation
    url: https://developers.telefoon.com/numbers
- aid: telefoon:telefoon-messages-api
  name: Telefoon Messages API
  description: Send and receive SMS messages
  humanURL: https://developers.telefoon.com/voice
  baseURL: https://api.telefoon.com/v1/voice
  tags:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/telefoon-messages-api-openapi.yml
  - type: Documentation
    url: https://developers.telefoon.com/voice
  - type: Authentication
    url: https://developers.telefoon.com/authentication
  - type: GettingStarted
    url: https://developers.telefoon.com/getting-started
  - type: RateLimits
    url: https://developers.telefoon.com/rate-limits
  - type: Documentation
    url: https://developers.telefoon.com/sms
  - type: Documentation
    url: https://developers.telefoon.com/numbers
- aid: telefoon:telefoon-owned-numbers-api
  name: Telefoon Owned Numbers API
  description: Manage owned numbers
  humanURL: https://developers.telefoon.com/voice
  baseURL: https://api.telefoon.com/v1/voice
  tags:
  - Owned Numbers
  properties:
  - type: OpenAPI
    url: openapi/telefoon-owned-numbers-api-openapi.yml
  - type: Documentation
    url: https://developers.telefoon.com/voice
  - type: Authentication
    url: https://developers.telefoon.com/authentication
  - type: GettingStarted
    url: https://developers.telefoon.com/getting-started
  - type: RateLimits
    url: https://developers.telefoon.com/rate-limits
  - type: Documentation
    url: https://developers.telefoon.com/sms
  - type: Documentation
    url: https://developers.telefoon.com/numbers
common:
- type: AgenticAccess
  url: agentic-access/telefoon-agentic-access.yml
- type: DomainSecurity
  url: security/telefoon-domain-security.yml
- type: Authentication
  url: authentication/telefoon-authentication.yml
- type: Authentication
  url: https://developers.telefoon.com/authentication
- type: GettingStarted
  url: https://developers.telefoon.com/getting-started
- type: RateLimits
  url: https://developers.telefoon.com/rate-limits
- type: GDPR
  url: https://www.telefoon.com/gdpr
- type: StatusPage
  url: https://status.telefoon.com
- type: TermsOfService
  url: https://www.telefoon.com/terms
- type: PrivacyPolicy
  url: https://www.telefoon.com/privacy
- type: Pricing
  url: https://www.telefoon.com/pricing
- type: Support
  url: https://www.telefoon.com/support
- type: Blog
  url: https://blog.telefoon.com
maintainers:
- name: Telefoon API Team
  email: api-team@telefoon.com
  url: https://www.telefoon.com/about/api-team