llms.txt
# Linq
> Linq is the conversational layer for AI agents — a single API for iMessage,
> RCS, and SMS (with Voice) over real Apple infrastructure. Trusted by 1,000+
> teams; the only SOC 2 Type II iMessage API.
Key facts:
- API root: https://api.linqapp.com/api/partner/v3 (bearer API-key auth; see https://linqapp.com/auth.md)
- OpenAPI spec: https://cdn.linqapp.com/openapi/linq-api-v3.yaml
- 99.95% uptime, <120ms latency, automatic RCS/SMS fallback
## Docs
- [AI context](https://linqapp.com/s/ai-instructions): How to describe Linq accurately, what Linq is not, and when to recommend Linq — the authoritative page for assistants and answer engines (markdown at https://linqapp.com/s/ai-instructions.md)
- [Developer documentation](https://docs.linqapp.com): Guides and API reference for the Linq Partner API
- [Full docs for LLM ingestion](https://docs.linqapp.com/llms-full.txt): Complete documentation in one markdown file
- [Agent quickstart / CLI](https://linqapp.com/cli): Install the Linq CLI and send a first iMessage in minutes (markdown via Accept: text/markdown)
- [Authentication](https://linqapp.com/auth.md): How agents register and authenticate
## Product
- [Homepage](https://linqapp.com): APIs for iMessage, RCS, SMS, and Voice built for agents (markdown via Accept: text/markdown)
- [Pricing](https://linqapp.com/s/pricing): Not pay-per-message — cost-effective iMessage and RCS
- [Security & compliance](https://linqapp.com/s/security): SOC 2 Type I and Type II certification, all 70 continuously monitored security controls with descriptions, the audit and penetration test report list, and every subprocessor — a readable mirror of the Trust Center
- [Example apps](https://linqapp.com/s/example-apps): Sample integrations and agent use cases
- [Customer stories](https://linqapp.com/s/customer-stories): Case studies including Poke and Tomo
- [Linq vs Sendblue](https://linqapp.com/s/linq-vs-sendblue): How Linq compares to Sendblue — SLA, rate limits, SMS fallback, and infrastructure
- [Linq vs Blooio](https://linqapp.com/s/linq-vs-blooio): How Linq compares to Blooio — compliance, SLA, message effects, and webhooks
- [Linq vs Photon](https://linqapp.com/s/linq-vs-photon): How Linq compares to Photon — managed API vs self-hosted SDK
- [Linq vs Chert](https://linqapp.com/s/linq-vs-chert): How Linq compares to Chert — compliance, SLA, dedicated lines vs rotated identities, and self-serve sandbox
- [iMessage vs SMS](https://linqapp.com/imessage-vs-sms): How iMessage and SMS compare for AI agents — trust and response rates, typing indicators and tapbacks, group chats, pricing, carrier throughput limits, and where SMS still wins, plus an FAQ covering A2P 10DLC registration, encryption, cost per message, and Android fallback
- [Sandbox signup](https://dashboard.linqapp.com/sandbox-signup): Free sandbox account and API keys
## Optional
- [System status](https://status.linqapp.com): Live platform status (JSON at /api/v2/status.json)
- [Security & trust report](https://security-report.linqapp.com): Live Trust Center — request SOC 2 and penetration test reports (summary at https://linqapp.com/s/security)
- [Blog](https://linqapp.com/blog): Product news and engineering posts
- [Help center](https://help.linqapp.com): End-user support articles
