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DNS3 min
Updating DNS Records Programmatically via the NameSilo API
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NameSilo Staff8/26/2026
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You can update DNS records programmatically using the NameSilo REST API. By making authenticated HTTP GET requests with your active API key, developers can automatically list, add, modify, or delete A, CNAME, and TXT records across thousands of domains without ever logging into the graphical web interface.
What Is the NameSilo DNS API?
The DNS portion of NameSilo's API exposes the same record management available in the web dashboard as callable HTTP endpoints. Every request is a simple GET call:
https://www.namesilo.com/api/OPERATION?version=1&type=xml&key=YOURAPIKEYResponses return as XML or JSON depending on the type parameter. The core DNS operations are dnsListRecords, dnsAddRecord, dnsUpdateRecord, and dnsDeleteRecord, each mapping directly to an action you'd otherwise perform by clicking through DNS Manager.
Why It Matters: Automating What Used to Require a Human
Dynamic DNS (DDNS): A home server or self-hosted setup with a changing IP address can run a script that checks its current public IP and calls dnsUpdateRecord automatically whenever it changes, no manual DNS edits required.
Let's Encrypt wildcard verification: Issuing a wildcard SSL certificate requires proving domain ownership via a temporary TXT record. Automating dnsAddRecord to create that record, then dnsDeleteRecord to remove it after verification, turns a manual multi-step process into a single script run during renewal.
For teams managing large domain portfolios, this is the difference between an afternoon of clicking and a five-minute automated batch job.
The Authentication Requirement
Every request needs a valid API key, generated from the API Manager page in your account. Before writing any integration:
Enable IP whitelisting. API Manager lets you restrict connections to up to 5 specific IP addresses. Leaving this open allows any system with your key to make changes, a serious risk if the key is ever exposed.
Treat the key like a credential. It authenticates every action the API can take, including registrations and billing operations. Store it in an environment variable or secrets manager, never hardcoded in a script.
Implementation Steps
Step 1: List existing records first
https://www.namesilo.com/api/dnsListRecords?version=1&type=xml&key=YOURKEY&domain=example.comThis returns every record on the domain, each with its own record_id. You need this value before you can update or delete anything.
Step 2: Add a new record
https://www.namesilo.com/api/dnsAddRecord?version=1&type=xml&key=YOURKEY&domain=example.com&rrtype=A&rrhost=test&rrvalue=192.0.2.1&rrttl=3600Step 3: Update an existing record
https://www.namesilo.com/api/dnsUpdateRecord?version=1&type=xml&key=YOURKEY&domain=example.com&rrid=RECORDIDHERE&rrhost=test&rrvalue=192.0.2.2&rrttl=3600Note the parameter name shift: dnsListRecords returns the identifier as record_id, but dnsUpdateRecord and dnsDeleteRecord expect that same value passed as rrid.
Step 4: Delete a record
https://www.namesilo.com/api/dnsDeleteRecord?version=1&type=xml&key=YOURKEY&domain=example.com&rrid=RECORDIDHERECommon Mistakes
Skipping dnsListRecords and guessing the record ID: There is no way to update or delete a specific DNS row without first retrieving its record_id via dnsListRecords. Attempting a direct update without this step fails every time; the record identifier is unique per entry and cannot be constructed manually.
Mixing up record_id and rrid: Since the response field and the request parameter use different names for the same value, copy-pasting incorrectly is a common source of silent failures.
Forgetting MX records need a distance value: Unlike other record types, MX records require a priority (distance) parameter; omitting it can produce unexpected routing behavior.
What This Means for You
Full parameter documentation for every DNS operation, along with a sandbox environment for safe testing, is available in NameSilo's API Reference. If you're setting up automation for a new domain, search available names to get started.
Frequently Asked Questions
Does NameSilo have a DNS API?
Yes, supporting list, add, update, and delete operations for DNS records.
How do I automate DNS record updates?
Call dnsListRecords to get the record ID, then dnsUpdateRecord with that ID.
Is the NameSilo API free to use?
Yes. Standard domain and service costs apply; API access itself is free.
What format does the NameSilo API use?
XML or JSON, selected via the type parameter in each request.
How do I find a DNS resource record ID?
Call dnsListRecords; each record returns its record_id in the response.
Can I use the API for Dynamic DNS (DDNS)?
Yes, by scripting dnsUpdateRecord calls whenever your IP changes.
How do I whitelist an IP for API access?
API Manager lets you enter up to 5 authorized IP addresses.
Where is the NameSilo API documentation?
At namesilo.com/api-reference, covering every available operation.
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NameSilo StaffThe NameSilo staff of writers worked together on this post. It was a combination of efforts from our passionate writers that produce content to educate and provide insights for all our readers.
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