# Exotel

**Canonical:** https://apis.io/providers/exotel/  
**Website:** https://exotel.com  
**APIs profiled:** 6

Exotel is an Indian cloud telephony and customer-engagement (CPaaS) platform offering programmable voice, SMS, virtual numbers (ExoPhones), IVR/call flows, call campaigns, and call-center tooling. Its Twilio-style REST APIs place outbound calls (connect two numbers or connect a number to a call flow), send SMS, return call and number metadata, and manage campaigns, over region-specific subdomains (api.exotel.com for Singapore, api.in.exotel.com for Mumbai/India) using HTTP Basic auth with an API Key and API Token. Exotel AgentStream adds a documented WebSocket voice-streaming API for real-time voicebots.

## Kin Score — 39.1 / 100 (thin)

Scored 2026-08-24 under rubric 0.13.0. Trend: flat (-0.4 from 39.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 62.0 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Telecommunications**: 16.7 (matched via tags).

## Agent readiness — 20.9 (agent-aware)

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

## Access

Freemium (free trial) · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (6)

- **Exotel AgentStream Voice Streaming API** — Documented WebSocket (wss://) voice-streaming API. When a call reaches a Voicebot or Stream applet, Exotel opens a secure WebSocket to your endpoint and streams base64 linear-PC...
- **Exotel Call Details API** — Retrieve details of past and in-progress calls.
- **Exotel Campaigns API** — Create and manage bulk outbound call campaigns (v2).
- **Exotel Numbers API** — Look up telecom metadata for phone numbers.
- **Exotel SMS API** — Send SMS and retrieve message details.
- **Exotel Voice API** — Place and control outbound voice calls.

## Agentic access (1)

- **Exotel Agentic Access** — 12 operations · 5 acting

## Security (2)

- **Exotel Authentication** — http · 1 scheme
- **Exotel Domain Security** — HSTS · DMARC

## Plans (1)

- **Exotel Plans Pricing**

## Tags

Cloud Telephony, Voice, SMS, India, CPaaS, Call Center, IVR, Numbers, Communications, Customer Engagement

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