Network

NB-IoT LTE-M Cat-M1 CoAP LwM2M Cellular IoT Packet Analyzer

Decode hex captures from cellular IoT devices: CoAP headers/options (block-wise, Observe), LwM2M TLV object trees with registry names, SMS-DELIVER UDH port addressing unwrapping CoAP-over-SMS, link-format registrations and DTLS record summaries.

html· HTML resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'http://127.0.0.1:3003/en/api/tools/nb-iot-lte-m-cat-m1-coap-lwm2m-cellular-iot-packet-analyzer' \
  -H 'Content-Type: application/json' \
  -d '{"packets":"label=registration 4202716daabbb272641200283c65703d6e622d696f742d3031066c743d333030ff3c2f332f303e2c3c2f342f303e\nlabel=device-read 60451234c22d16ffc800144f70656e204d6f62696c6520416c6c69616e6365c801164c69676874776569676874204d324d20436c69656e74c80209333435303030313233c303312e30c10964\nlabel=sms-nas 40082143658781000462900110325483120605041633163342010001aabb6051330130\nlabel=dtls 17fefd00010000000000050030abababababababababababababababababababababababababababababababababababababababababababababababab","decodeMode":"auto","showBytes":false}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST http://127.0.0.1:3003/en/api/tools/nb-iot-lte-m-cat-m1-coap-lwm2m-cellular-iot-packet-analyzer

Parameters

Name	Type	Required	Description
packets	textarea	Yes	—
decodeMode	select	No	—
showBytes	checkbox	No	—

Response format

HTML result

JSON

{
  "result": "<div>Processed HTML content</div>",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-nb-iot-lte-m-cat-m1-coap-lwm2m-cellular-iot-packet-analyzer": {
      "name": "nb-iot-lte-m-cat-m1-coap-lwm2m-cellular-iot-packet-analyzer",
      "description": "Decode hex captures from cellular IoT devices: CoAP headers/options (block-wise, Observe), LwM2M TLV object trees with registry names, SMS-DELIVER UDH port addressing unwrapping CoAP-over-SMS, link-format registrations and DTLS record summaries.",
      "baseUrl": "http://127.0.0.1:3003/mcp/sse?toolId=nb-iot-lte-m-cat-m1-coap-lwm2m-cellular-iot-packet-analyzer",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "nb-iot-lte-m-cat-m1-coap-lwm2m-cellular-iot-packet-analyzer",
    "arguments": {
  "packets": "label=registration 4202716daabbb272641200283c65703d6e622d696f742d3031066c743d333030ff3c2f332f303e2c3c2f342f303e\nlabel=device-read 60451234c22d16ffc800144f70656e204d6f62696c6520416c6c69616e6365c801164c69676874776569676874204d324d20436c69656e74c80209333435303030313233c303312e30c10964\nlabel=sms-nas 40082143658781000462900110325483120605041633163342010001aabb6051330130\nlabel=dtls 17fefd00010000000000050030abababababababababababababababababababababababababababababababababababababababababababababababab",
  "decodeMode": "auto",
  "showBytes": false
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]