- Visibility13
- Citations0
- Sentiment75
- Site quality80
- AI readiness43
AI assistants name Century Aluminum in 6.7% of answers, which is slightly more often than the typical company in its sector. Its overall score is 36 out of 100, ranking 769th of 2,047 companies in the study. The website passes 6 out of 14 technical checks for AI tool readiness.
We asked 15 unbranded questions about the industrial market: none named Century Aluminum. AI assistants named it in 4 of 60 answers (6.7%). The typical industrial company is named in 5.0% of answers. By how often it is named, Century Aluminum ranks 97 of 246 in its sector.
Every dot is a company in the study. Hover one to see it; click to open its report.
This companySame sectorEvery other companyNever named
Five parts, each scored out of 100.
How often AI assistants name the company
How often AI uses the company's own website as a source
How positively AI describes the company
How well built the website's own pages are
How easily AI tools can read and use the website
Visibility is calculated from the answers on this page. How the score is built.
246 companies in this sector. The line on each bar is the typical company.
An answer that names the company
“What are the most reliable sources of primary aluminum for manufacturing in the US?”
The most reliable sources of primary aluminum for manufacturing in the U.S. come from a combination of domestic production and imports.
Domestic Production:
While the U.S. was once a leading global producer of primary aluminum, domestic production has significantly declined over the past few decades. In 2023, the U.S. produced 860,000 metric tons of primary aluminum from six smelters, a significant drop from 3.8 million metric tons in 1999. By March 2024, there were only four operating plants with a combined annual capacity of 650,000 metric tons.
Major U.S. producers of primary aluminum …
The AI’s answer as we received it, shortened and not checked for accuracy.
How the mentions in these answers were split between this company and its rivals
Answers naming it, out of answers received
What this website publishes for an AI agent to read, use and buy from, on a scale of six levels.
- 0
- 1
- 2
- 3
- 4
- 5
Level 1: Basic web presence. Two of robots.txt, a sitemap and Link headers are in place.
- Content Signals
Show every check, for your technical teamHide the checks
- study: 92.0%robots.txtPassed
A valid robots.txt with crawl rules at the site root.
- study: 86.8%SitemapPassed
An XML sitemap listing the pages, ideally referenced from robots.txt.
- study: 0.3%Link headersNot met
Send Link headers such as rel="api-catalog" or rel="describedby" on the homepage.
- study: 5.5%DNS for AI DiscoveryNot present
Advertise agent endpoints with SVCB records under _agents.
- study: 1.9%Markdown negotiationNot met
Return a markdown version when asked with Accept: text/markdown, for example at the CDN.
- study: 25.1%llms.txtNot met
Publish an llms.txt with a short summary and the key links.
- study: 93.4%AI bot rulesPartly met
Add explicit robots.txt groups for the main AI crawlers.
- study: 1.4%Content SignalsNot met
Add a Content-Signal line for search, ai-input and ai-train to robots.txt.
- study: 0.2%Web Bot AuthNot present
Only relevant if you run your own agents or crawlers: publish a signing key directory.
- study: 0.3%API CatalogNot met
List public APIs in a linkset at /.well-known/api-catalog.
- study: 11.8%OAuth discoveryPartly met
Publish OpenID Connect or OAuth server metadata under /.well-known.
- study: 10.3%OAuth Protected ResourcePassed
Metadata telling agents which authorization server to use.
- study: 0.0%auth.mdNot met
Publish an auth.md describing how agents sign in.
- study: 0.2%MCP Server CardNot met
Offer an MCP server and publish its server card under /.well-known.
- study: 0.1%A2A Agent CardNot met
Publish an agent card at /.well-known/agent-card.json.
- study: 0.2%Agent SkillsNot met
Publish a skills index with the main tasks agents can do.
- study: 33.7%WebMCPCould not check
Register key actions such as search or cart as WebMCP tools.
- study: 0.1%ARD manifestNot met
Publish an ai-catalog.json listing every agent interface.
Score 31 of 100 · 97% of checks could run · checked on October 5, 2026 · centuryaluminum.com · 2,047 companies scanned
6 of 14 passed. This list is for your technical team. The percentage is how many companies in the study pass each check.
These 14 checks ran during the audit and are what the AI readiness part of the overall score counts. The scan above ran later and is stricter on Link headers and Markdown, so a check can pass here and not there.
Show the 14 checksHide them
- Passedrobots.txt publishedstudy: 85.0%
- PassedXML sitemapstudy: 73.2%
- PassedHTTP Link headers (RFC 8288)study: 29.0%
- Not metMarkdown content negotiationstudy: 8.3%
- Not metllms.txt publishedstudy: 21.7%
- PassedToken budget (page weight)study: 95.2%
- Not metExplicit AI bot rulesstudy: 13.0%
- Not metAPI Catalog (.well-known/api-catalog)study: 0.2%
- PassedOAuth Authorization Server discoverystudy: 10.1%
- PassedOAuth Protected Resource discoverystudy: 9.3%
- Not metMCP Server Cardstudy: 0.0%
- Not metA2A Agent Cardstudy: 0.0%
- Not metWebMCP toolsstudy: 4.2%
- Not metAgent Skills declaredstudy: 0.0%
This website sets no rules for any AI crawler by name, like 84% of the websites whose rules we could read. Every AI crawler follows its general rules.
- GPTBotallowed
- ClaudeBotallowed
- Anthropic-AIallowed
- Google-Extendedallowed
- Applebot-Extendedallowed
- Meta-ExternalAgentallowed
- FacebookBotallowed
- Bytespiderallowed
- CCBotallowed
- Diffbotallowed
- Omgilibotallowed
- OAI-SearchBotallowed
- Claude-SearchBotallowed
- PerplexityBotallowed
- Applebotallowed
- Amazonbotallowed
- YouBotallowed
- ChatGPT-Userallowed
- Claude-Userallowed
- Perplexity-Userallowed
- DuckAssistBotallowed
- MistralAI-Userallowed
Read from the website’s own rules file (robots.txt). An asterisk marks a crawler the file names. The rest follow its general rules. “Partly” means only some pages are blocked.
How many times each website was listed as a source in these answers
In the study as US-listed.
- Primary aluminum vs. secondary aluminum: which is better for automotive component manufacturing?
- Are there measurable benefits to choosing sustainable aluminum suppliers for large construction projects?
- What are the most reliable sources of primary aluminum for manufacturing in the US?
- What role does primary aluminum play in electric vehicle production?
- How does primary aluminum differ from recycled aluminum in terms of performance for industrial applications?
- Are there viable substitutes for primary aluminum in heavy construction projects?
- What factors affect the price of primary aluminum in the American market?
- How does the cost of sustainable primary aluminum compare to regular aluminum options?
- Most popular end-use industries for primary aluminum consumption in the United States
- Is it worth paying a premium for domestically produced primary aluminum?
- How is primary aluminum typically used in renewable energy infrastructure?
- How do you address inconsistencies in aluminum billet supply for industrial manufacturing?
- Best ways to source sustainable primary aluminum for infrastructure projects
- What are the main alternatives to using primary aluminum in high-strength industrial applications?
- What are common quality issues when sourcing primary aluminum for aerospace manufacturing?
Columns, left to right: OpenAI, Claude, Perplexity, Gemini. The AI assistants often disagree. Across the study, on 40% of the questions where a company is named, only one of the four names it.
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<a href="https://aeo-audit.rezolve.com/us/centuryaluminum.com"><img src="https://aeo-audit.rezolve.com/us/badges/centuryaluminum.com.svg" alt="Overall score 36 of 100, US AI Visibility Study 2026" width="280" height="64"></a>