Letterly Integrations
Put Letterly to work with AI and enterprise-grade automation
4.9/5 on G2·
Google for Startups Accelerator
No Letterly connector? The Agent builds one.
Web search for Letterly's public API docs, or hand over your own — either way, the Agent researches the real API surface and ships a working connector.
Try Knit FreeNot a block library. Real code.
Legacy automation tools like Zapier, Workato, and Make hand you a fixed library of pre-built steps to drag, drop, and configure around the edges. Knit's Integrations Agent writes real, custom Letterly integration code for your exact logic.
Legacy iPaaS
- Fixed library of pre-built steps — drag, drop, configure around the edges
- Capped by whatever the vendor's already built
- AI features bolted on after the fact
Knit Integrations Agent
- Real, inspectable code for your exact Letterly logic
- Auto-builds a missing Letterly connector itself
- Native LLM connectors built in, not bolted on
from knit import Knit
client = Knit(api_key=KNIT_API_KEY)
@client.on("new-conversation-started")
def send_a_message(event):
return client.ai_assistants_&_chatbots.send_a_message(
integration_id=LETTERLY_INTEGRATION_ID,
record_id=event["id"],
fields={
"source": "Letterly",
"synced_at": event["updated_at"],
},
# ...maps the event to a real "Send a message" call
)Example: illustrative of what the Agent generates from a plain-English prompt — real, inspectable, and yours to edit.
Skip the engineering. Ship the workflows.
See what you can build with Letterly on Knit
Letterly → Readwise
When a document is finished in Readwise Reader, sync the article details to Letterly.
Letterly → ChatGPT
When speech-to-text or letterly actions occur in Letterly, process the generated draft in ChatGPT (OpenAI).
Letterly → Claude
When speech-to-text actions complete in Letterly, refine and reformat text using Anthropic (Claude).
Letterly → Notion
Create database items in Notion whenever new Letterly actions are triggered.
Letterly → Readwise
When a document is finished in Readwise Reader, sync the article details to Letterly.
Letterly → ChatGPT
When speech-to-text or letterly actions occur in Letterly, process the generated draft in ChatGPT (OpenAI).
Letterly → Claude
When speech-to-text actions complete in Letterly, refine and reformat text using Anthropic (Claude).
Letterly → Notion
Create database items in Notion whenever new Letterly actions are triggered.
Letterly → Gmail
Send an email in Gmail based on new Letterly actions.
Letterly → Microsoft Outlook
Create draft emails in Microsoft Outlook from new Letterly actions.
Letterly → Evernote
Create notes in Evernote whenever new actions occur in Letterly.
Letterly → Google Tasks
Create tasks in Google Tasks from new Letterly actions.
Letterly → Gmail
Send an email in Gmail based on new Letterly actions.
Letterly → Microsoft Outlook
Create draft emails in Microsoft Outlook from new Letterly actions.
Letterly → Evernote
Create notes in Evernote whenever new actions occur in Letterly.
Letterly → Google Tasks
Create tasks in Google Tasks from new Letterly actions.
See the APIs & webhooks enabling Letterly Integrations
The real endpoints Knit's Agent can call to turn a plain-English use case into working Letterly Integration code
Triggers when you select an action from the note.
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Customer Stories
See how leading technology firms are scaling their operations
Amazing Product With Exceptional Support from the team. By using Knit we managed to speed up our development by orders of magnitude.
A brilliant tool to let you seamlessly integrate with many different systems. It is very easy to integrate with and customer support is next level.
Seamless integration experience. Well-documented, self-explanatory APIs, and excellent service and support.
Easy to integrate. Knit's dashboard is intuitive for setting up and testing integrations, and the sandbox is extremely useful during development.
Knit shipped a brand-new Timesheet API in a week and handed us a ready-to-use NetSuite sandbox. That velocity is priceless when you're running payroll in 40+ countries.
#1 in Ease of Integrations
4.9 out of 5 stars on G2
Common questions about the Letterly automation
Is there a pre-built Letterly automation?
Not yet — Letterly isn't in Knit's Unified API or MCP Servers catalog today, so there's no pre-built connector for it either. The Integrations Agent can build the real automation (and the connector powering it) on demand instead of you waiting on our roadmap.
How does the Agent actually build the Letterly connector?
It researches Letterly's real public API documentation — authentication, endpoints, data schema — and writes a working connector against that real surface. You can also upload your own docs if Letterly's aren't public.
How long does it take?
Minutes to build a first working version, not weeks — you test it against real Letterly data before it goes anywhere near production.
What happens after the Agent builds it?
You own it. It runs the same way any Knit-built connector does — you are not left maintaining hand-rolled integration code yourself.
Could Letterly become a real pre-built connector later?
Yes — as apps get built and used through the Agent, the highest-demand ones are natural candidates to join the pre-built Unified API/MCP Servers catalog directly.