Visible Amsterdam: Join us Sep 3
Promptwatch Logo

Nostra

Nostra accelerates site speed for managed web platforms.
Nostra
SEO

What is Nostra?

Nostra is a SEO crawler. Nostra accelerates site speed for managed web platforms.

Nostra is an operational bot rather than an AI crawler, so it does not directly affect whether you appear in AI answers. It still shows up in your logs, and bots like it help keep your site healthy and crawlable, which indirectly supports both SEO and AI visibility.

Like any automated client, Nostra consumes crawl budget and appears in your server and CDN logs. Reviewing those logs alongside your robots.txt rules helps you keep automated traffic deliberate and easy to reason about.

Want to see every AI bot hitting your site? Promptwatch turns your server and CDN logs into a live view of AI crawler and agent traffic, so you can watch ChatGPT, Claude, Perplexity, Gemini, and others crawl your pages and connect those visits to real citations and revenue. Learn more in AI crawler logs.

See every AI bot hitting your site

Promptwatch turns your server and CDN logs into a live view of AI crawler and agent traffic. Watch ChatGPT, Claude, Perplexity, Gemini, and more crawl your pages in real time, see exactly what they take, and connect every crawl to the citations and revenue it drives.

How to handle Nostra

Whether to allow Nostra depends on whether you rely on the service behind it. Use a robots.txt rule to allow or disallow it.

Nostra does not send a stable user-agent token, so a robots.txt rule cannot reliably target it. It instead signs every request using Web Bot Auth HTTP message signatures and publishes its public keys at https://bots.nostra.ai/.well-known/http-message-signatures-directory. Verify that signature at your CDN or edge and allow or block it there.

The operator does not publish a robots.txt commitment for Nostra, so confirm how it behaves by watching your access logs.

Examples

  • A site owner spots Nostra in access logs and confirms it against the operator's documented user agent.
  • An operations team allows Nostra so the SEO reporting it powers stays accurate.

Related bots

AhrefsBot

Powers the database for both Ahrefs, a marketing intelligence platform, and Yep, an independent, privacy-focused search engine.

SEO

AhrefsSiteAudit

Powers Ahrefs’ Site Audit tool. Ahrefs users can use Site Audit to analyze websites and find both technical SEO and on-page SEO issues.

SEO

Barkrowler

Barkrowler is Babbar's web crawler that fuels and updates their graph representation of the web, providing SEO tools for the marketing community.

SEO

ClarityBot

ClarityBot is seoClarity's web crawler that performs technical SEO audits, analyzes content, and monitors website performance.

SEO

DataForSeoBot

DataForSeoBot is a backlink checker bot operated by DataForSEO that crawls websites to build and maintain their backlink database.

SEO

Frequently asked questions about Nostra

Learn about AI visibility monitoring and how Promptwatch helps your brand succeed in AI search.

Nostra is operated by the company of the same name. It functions as a SEO crawler.

Be the brand AI recommends

Monitor your brand's visibility across ChatGPT, Claude, Perplexity, and Gemini. Get actionable insights and create content that gets cited by AI search engines.

Promptwatch Dashboard