# FreJun Teler

**Canonical:** https://apis.io/providers/frejun-teler/  
**Website:** https://www.frejun.ai  
**APIs profiled:** 1

FreJun Teler is a developer-first programmable voice/telephony API (CPaaS) that handles carriers, phone numbers, and real-time audio streaming so developers can connect AI models (STT/LLM/TTS) to live phone calls. It offers real-time bidirectional audio over WebSocket (L16/8000 Hz, sub-250ms latency) and programmable SIP trunking, with webhook event delivery and official Python (teler) and Node (@frejun/teler) SDKs.

## Kin Score — 48.3 / 100 (developing)

Scored 2026-09-15 under rubric 0.22.0.

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 60.4 |
| Contract Governance | 4.5 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 56.5 |
| Access Clarity | 44.7 |

Regulatory layer — **Telecommunications**: 34.7 (matched via tags).

## Agent readiness — 46.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |

## APIs (1)

- **Teler Voice API** — Programmable voice/telephony API. Places and controls live voice calls (initiate, play audio, DTMF, transfer, hangup), streams bidirectional call audio to AI agents over a WebSo...

## MCP servers (1)

- **FreJun Teler MCP Server**

## Security (2)

- **Frejun Teler Authentication** — apiKey · 1 scheme
- **Frejun Teler Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Frejun Teler Plans Pricing**

## Tags

programmable voice API, voice AI infrastructure, CPaaS, SIP Trunking, telephony API, real-time media streaming, WebSocket audio, Call Automation, conversational AI infrastructure

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/frejun-teler/). Scores are computed from the provider's own public artifacts under a published rubric.