# Chert

**Canonical:** https://apis.io/providers/chert/  
**Website:** https://console.trychert.com  
**APIs profiled:** 1

Chert is iMessage infrastructure for reaching people at scale. Its Messaging API lets teams programmatically send, receive, route, and observe real iMessage conversations — blue-bubble threads from verified numbers with typing indicators, tapback reactions, reply context, multi-recipient group threads, SMS fallback, file attachments, rich-link previews, one-time location pins, and delivery receipts. Chert also ships native integrations for Salesforce, HubSpot, and Slack, plus webhook subscriptions and an event stream (message.received, reaction.added/removed) for real-time inbound replies. Auth is bearer token or HMAC-SHA256 request signing; writes support an idempotency_key. Chert is a Y Combinator (Spring 2026) company based in the San Francisco Bay Area.

## Kin Score — 35.4 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 35.4).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 45.1 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 54.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 36.3 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | documented |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | yes |
| 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 (1)

- **Chert Messaging API** — Programmatic send/receive/route over iMessage — 1:1 and group chats, attachments, rich links, tapbacks, typing indicators, location pins, webhook subscriptions and events.

## MCP servers (1)

- **Chert MCP Server**

## Security (2)

- **Chert Authentication** — http/hmac · 2 schemes
- **Chert Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Messaging, iMessage, Communications, Conversational, Webhook, CRM Integration

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