# JustCall

**Canonical:** https://apis.io/providers/justcall/  
**Website:** https://justcall.io  
**APIs profiled:** 4

JustCall is a cloud-based phone system and contact center platform that provides voice calling, SMS/MMS messaging, IVR, call analytics, and contact management for small and mid-sized businesses. The platform integrates with CRMs, helpdesks, and automation tools. JustCall exposes REST APIs and webhooks for programmatically managing calls, SMS, contacts, phone numbers, and call dispositions, authenticated via API key plus API secret in headers.

## Kin Score — 35.2 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 35.2).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 55.9 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 38.1 |
| Commercial Clarity | 31.6 |
| Access Clarity | 31.6 |

Regulatory layer — **Telecommunications**: 23.6 (matched via tags).

## Agent readiness — 26.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (4)

- **JustCall REST API** — REST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call dispositions in JustCall. Authentication uses an API key and API secr...
- **JustCall Calls API** — Manage and query voice calls handled through JustCall.
- **JustCall Contacts API** — Create and manage contacts in the JustCall directory.
- **JustCall SMS API** — Send and manage SMS/MMS messages.

## Agentic access (1)

- **Justcall Agentic Access** — 3 operations · 2 acting

## Security (3)

- **Justcall Authentication** — apiKey · 1 scheme
- **Justcall Domain Security** — TLSv1.3 · HSTS · DMARC
- **Justcall Trust Center** — SOC 2, ISO 27001, PCI DSS, HIPAA, CSA STAR

## Tags

Voice, SMS, Cloud Phone, Contact Center, Telephony, Communications

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