aid: chert
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/chert.png
name: Chert
description: >-
  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.
url: https://raw.githubusercontent.com/api-evangelist/chert/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Messaging
- iMessage
- Communications
- Conversational
- Webhooks
- CRM Integration
- API
apis:
- name: Chert Messaging API
  description: >-
    Programmatic send/receive/route over iMessage — 1:1 and group chats, attachments,
    rich links, tapbacks, typing indicators, location pins, webhook subscriptions and events.
  humanURL: https://docs.trychert.com/api/overview
  baseURL: https://console.trychert.com/api/v1
  tags:
  - Messaging
  - iMessage
  - Webhooks
  properties:
  - type: Documentation
    url: https://docs.trychert.com
  - type: APIReference
    url: https://docs.trychert.com/api/overview
  - type: Quickstart
    url: https://docs.trychert.com/api/quickstart
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DeveloperPortal
  url: https://console.trychert.com
- type: Documentation
  url: https://docs.trychert.com
- type: APIReference
  url: https://docs.trychert.com/api/overview
- type: GettingStarted
  url: https://docs.trychert.com/quickstart
- type: SignUp
  url: https://console.trychert.com
- type: Support
  url: https://www.trychert.com/contact
- type: Blog
  url: https://www.trychert.com/blog
- type: GitHubOrganization
  url: https://github.com/cherthq
- type: TermsOfService
  url: https://www.trychert.com/terms
- type: PrivacyPolicy
  url: https://www.trychert.com/privacy
- type: LLMsTxt
  url: llms/chert-llms.txt
- type: Authentication
  url: authentication/chert-authentication.yml
- type: ErrorCatalog
  url: errors/chert-error-codes.yml
- type: Conventions
  url: conventions/chert-conventions.yml
- type: Idempotency
  url: conventions/chert-conventions.yml
- type: Webhooks
  url: asyncapi/chert-webhooks.yml
- type: Lifecycle
  url: lifecycle/chert-lifecycle.yml
- type: MCPServer
  url: mcp/chert-mcp.yml
- type: Sandbox
  url: sandbox/chert-sandbox.yml
- type: DataModel
  url: data-model/chert-data-model.yml
- type: DomainSecurity
  url: security/chert-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence