# Quo

**Canonical:** https://apis.io/providers/quo/  
**Website:** https://quo.com  
**APIs profiled:** 9

Quo (formerly OpenPhone) is an AI-powered business communication platform that unifies calls, texts, and contacts in one shared workspace for startups and small businesses. Its REST Public API (https://api.quo.com/v1) lets developers send and receive SMS, manage contacts, conversations, and tasks, retrieve AI-generated call summaries and transcripts, and subscribe to Standard-Webhooks-signed events for messages and calls. Authentication is via a workspace API key sent in the Authorization header. This profile was added to the API Evangelist network from VC portfolio discovery and enriched from Quo's live developer documentation and published OpenAPI.

## Kin Score — 51.4 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 51.4).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 69.9 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 56.5 |
| Commercial Clarity | 36.8 |
| Access Clarity | 36.8 |

Regulatory layer — **Telecommunications**: 36.1 (matched via tags).

## Agent readiness — 36.1 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | yes |
| Agent Skills | derived |
| 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 (9)

- **Quo Calls API** — Operations related to calls
- **Quo Contact Custom Fields API** — The Contact Custom Fields API from Quo — 1 operation(s) for contact custom fields.
- **Quo Contacts API** — Operations related to contacts
- **Quo Conversations API** — Operations related to conversations
- **Quo Messages API** — Operations related to text messages
- **Quo Phone Numbers API** — Operations related to phone numbers
- **Quo Tasks API** — The Tasks API from Quo — 10 operation(s) for tasks.
- **Quo Users API** — Operations related to users
- **Quo Webhooks API** — Operations related to webhooks

## MCP servers (1)

- **Quo API MCP (candidate)** — Candidate Model Context Protocol tool surface derived from the Quo Public API v1 OpenAPI operations. Quo markets a "Quo MCP" capability on quo.com, but no hosted/remote MCP serv...

## Security (3)

- **Quo Authentication** — apiKey · 1 scheme
- **Quo Domain Security** — TLSv1.3 · DMARC
- **Quo Trust Center** — SOC 2, HIPAA, GDPR

## Tags

Company, Communications, Messaging, SMS, Voice, Contacts, Webhook

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