# Cello

**Canonical:** https://apis.io/providers/cello/  
**Website:** https://docs.cello.so  
**APIs profiled:** 5

Cello is an all-in-one, AI-powered referral platform for SaaS companies. It lets product teams embed in-product user referrals and run partner/affiliate programs with a few lines of code, then automates attribution, campaigns, notifications, fraud detection, and cross-border payouts. Cello ships an embeddable Referral Component and Attribution JS SDK for web plus native iOS, Android, Flutter, and React Native SDKs, a REST API for tokens, referral-code validation, events, and new-user rewards, a Growth Portal for analytics, and an official hosted MCP server exposing developer and growth-manager tools. Customers include Typeform, Miro, Descript, Pleo, and SmallPDF. Backed by HV Capital.

## Kin Score — 60.0 / 100 (strong)

Scored 2026-08-17 under rubric 0.11.0. Trend: rising (+7.4 from 52.6).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 54.3 |
| Governance | 20.8 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 75.5 |
| Commercial Clarity | 84.2 |

## Agent readiness — 63.3 (agent-ready)

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

## Access

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

## APIs (5)

- **Cello Events API** — The Events API from Cello — 1 operation(s) for events.
- **Cello New Users API** — The New Users API from Cello — 1 operation(s) for new users.
- **Cello Referral Codes API** — The Referral Codes API from Cello — 2 operation(s) for referral codes.
- **Cello Referrers API** — The Referrers API from Cello — 1 operation(s) for referrers.
- **Cello Token API** — The Token API from Cello — 1 operation(s) for token.

## MCP servers (1)

- **cello-mcp.yml**

## Agentic access (1)

- **Cello Agentic Access** — 6 operations · 3 acting

## Security (2)

- **Cello Authentication** — http/oauth2 · 3 schemes
- **Cello Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Cello Plans Pricing**

## Tags

Company, Referral Marketing, Affiliate Marketing, Growth, SaaS, Attribution, Partner Programs, Ai Enterprise Software

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