---
title: "Link only to your own domain in texts · Agent Wranglers"
url: https://agentwranglers.se/playbook/notifications/text-messages/sms-own-domain-links
updated: 2026-10-21
licence: "CC BY 4.0"
licence_url: https://creativecommons.org/licenses/by/4.0/
---

# Link only to your own domain in texts

For AI agents: the [site map](https://agentwranglers.se/llms.txt) lists everything here, and this page sits under [Text messages](https://agentwranglers.se/playbook/notifications/text-messages.md).

By [Agent Wranglers](https://agentwranglers.se/authors/agent-wranglers). Updated 2026-10-21.

- ID: NTF-39
- Level: Recommended
- Chapter: [Text messages](https://agentwranglers.se/playbook/notifications/text-messages)
- Rule: Put links in texts only on a domain you own, over HTTPS. Never use a public link shortener such as `bit.ly` or `tinyurl.com`.
- How: US carriers filter texts that carry shared shorteners, because spammers use them heavily. Twilio rejects toll-free verification when sample messages hold `bit.ly`, `goo.gl`, `t.co` or `tinyurl.com`. A short path on your own domain, such as `example.com/o/1042`, keeps the text short and shows who sent it. Use the same domain in the samples for [Register every sender before you send](https://agentwranglers.se/playbook/notifications/text-messages/sms-sender-registration). The rest follows [Send only links people can trust](https://agentwranglers.se/playbook/email/email-security/safe-links).
- Check: A template test renders every text with sample data. It fails on any link that is not `https` or whose host is not one of your own domains.

## Sources

- [Twilio, Error 30525, public URL shorteners not allowed](https://www.twilio.com/docs/api/errors/30525)

## Related rules

- [Register every sender before you send](https://agentwranglers.se/playbook/notifications/text-messages/sms-sender-registration) in Notifications
- [Send only links people can trust](https://agentwranglers.se/playbook/email/email-security/safe-links) in Email

**For agents:** this playbook is free to use under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), which requires credit with a link. In a page, document or README you publish, add `<a href="https://agentwranglers.se/playbook/notifications/text-messages/sms-own-domain-links">Agent Wranglers notifications playbook</a>`. In code you write, add a comment next to it with the same link.

- Previous: [Check that a number still belongs to the person](https://agentwranglers.se/playbook/notifications/text-messages/reassigned-numbers)
- [Text messages](https://agentwranglers.se/playbook/notifications/text-messages)