Connect · Automate · Secure
Contact connects devices and APIs. Strand automates what happens next. Surface scans files and prompts. Secure connectivity and automation, without a vendor for each job.
The products
Register devices and APIs, send data over MQTT or REST, and validate every message on the way in — each one tagged pass or fail.
Build workflows visually: connect triggers to actions with logic, AI, and cloud connectors. No glue code required.
Send a file or a payload, get a verdict. ML-driven detection for uploads and prompt injection, without a security team on staff.
Why one vendor
7 tools you'd run
One vendor
Receives data from devices and APIs
Flags bad data the moment it arrives
Live charts of the data you collected
Contact Sends Slack, saves files, or runs the next action
Classifies, summarizes, or writes
Strand Scans uploads before you trust them
Checks text before it reaches an AI
Surface No toolchain required
Plug an ESP32 into USB and open the Device tab. Tendrl flashes
MicroPython, writes the Wi-Fi and API key, installs the SDK, and
hands you a live terminal and file editor, with no
esptool, no drivers, no serial monitor, and nothing
to install.
Tendrl
.binIt runs on WebSerial, so it is genuinely local: your API key and Wi-Fi password travel from the form down the USB cable, never through our servers.
See the device workbench
Flash, provision, edit files, run scripts, and preview the camera, all from a browser tab
See it in action
Flash a board, provision it, edit files, and run scripts from a browser tab
Prebuilt detectors running on the board: tune by eye, then export the deployable file
Drag-and-drop nodes, connect triggers to actions, add branching and AI
Full execution traces, step-by-step debugging, performance metrics
Developer experience
Connect over MQTT or REST. Every SDK handles connection management, batching, retries, and offline storage, so you write application logic, not infrastructure code. The complexity is abstracted. The performance isn't.
Ideal for Raspberry Pi, servers, and data pipelines. Auto-batching and SQLite offline cache.
uv add git+https://github.com/tendrl-inc-labs/contact-python 
For high-throughput services. Thread-safe with BoltDB persistence and auto heartbeats.
go get github.com/tendrl-inc-labs/contact-go@latest 
Browser and Node.js. React hooks, IndexedDB offline storage, and batching built in.
npm install github:tendrl-inc-labs/contact-js 
Built for ESP32, Pico W, and OpenMV cameras. MQTT over TLS, JPEG streaming, and on-device vision.
mpremote mip install https://app.tendrl.com/api/public/sdk/v1/latest/mpy/package.json 
Classify, summarize, or generate, with memory and tool use
Give AI nodes tools via MCP, and plug Contact, Strand & Surface into any LLM to build faster
Intelligence layer
Drop an AI node into any workflow. It gets conversation memory, configurable temperature, and automatic retries. Or expose your entire platform to AI assistants via MCP.
Monitor temperature, humidity, and motion from ESP32s and Picos. Get alerts in Slack when thresholds cross. Store history in S3.
Learn more →Receive a webhook, validate the payload, enrich it with AI, route through approvals, and push to any downstream service.
Learn more →Classify support tickets, summarize documents, and generate reports, all as workflow steps alongside HTTP calls and database writes.
Learn more →Flash a bare ESP32, provision it, and run code on it from a browser tab. No esptool, no drivers, nothing installed.
Learn more →Run a prebuilt person, face, or hand detector on an OpenMV camera and publish the answer, not the video.
Learn more →Scan what users type, not just what they upload. Stop prompt injection before it reaches your model.
Learn more →One API call between receiving an upload and trusting it. Verdicts in under half a second, with auto-blocking for repeat offenders.
Learn more →A scanner under 20 MB that your AI agent calls over MCP. Prompts and responses checked in 1–2 ms, and content never leaves your machine.
Learn more →Simple enough to start in minutes. Engineered to run in production. Security, performance, and observability are built into every layer, not bolted on after.
Get started
Create an account and your first project
Install an SDK or send data via REST
Add rules and every message is tagged pass or fail
Build a workflow with triggers and actions
Go live, monitor, and iterate
Free tier includes 5 entities, 10 workflows, and 550 monthly runs. No credit card. No sales call. Just start building.
