DNSimple DNS Updater for OS X Yosemite

com.dnsimple.dynamicdns.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
     <key>KeepAlive</key>
     <false/>
     <key>Label</key>
     <string>com.dnsimple.dynamicdns</string>
     <key>LowPriorityIO</key>
     <true/>
     <key>ProgramArguments</key>
     <array>
          <string>/usr/local/bin/DNSimpleUpdater</string>
     </array>
     <key>RunAtLoad</key>
     <true/>
</dict>
</plist>

DNSimpleUpdater

#!/bin/bash
 
AUTH_EMAIL='your@email' # dnsimple account email address
AUTH_TOKEN='your-api-token' # dnsimple api token
DOMAIN_ID='yourdomain.com' # domain name or id
RECORD_ID='12345' # record id to update
IP="`curl http://icanhazip.com/`"

curl -H "X-DNSimple-Token: $AUTH_EMAIL:$AUTH_TOKEN" \
     -H "Accept: application/json" \
     -H "Content-Type: application/json" \
     -X PUT \
     -d "{\"record\":{\"content\":\"$IP\"}}" \
     https://api.dnsimple.com/v1/domains/$DOMAIN_ID/records/$RECORD_ID

Note: Ensure the record you're updating is an A record type. While it's not mentioned in the DNSimple API documentation, if the DNS record being updated [with an IP address] is a CNAME record type (and likely other types as well) the API call will fail with the following response: {"message":"Validation failed","errors":{"content":["must be a domain name"]}} Strangely, however, an IP address can be assigned as the value of a CNAME record type when using the website.

At this point it should not be possible to use an IP address in a CNAME from the site either. I recently added a validation that will prohibit that, which is probably what caused the problem to appear for you recently.

Couple of things changed since then... API is now v2, which is a bit different. The canihazip.com service you need to specify -4 to return ipv4 ip otherwise you just get an error from dnsimple saying it's not valid.

IP=$(curl -4 https://icanhazip.com)

curl -H 'Authorization: Bearer <token>' \
     -H 'Accept: application/json' \
     -H 'Content-Type: application/json' \
     -X PATCH \
     -d "{\"content\":\"$IP\"}" \
     https://api.dnsimple.com/v2/:account_id/zones/:domain_id/records/:record_id