Prepare the sermon with AI.
Keep it yours.
ChatLumin walks you from the text to Sunday. It does the research and names every source. Your reading, your direction, and your voice stay in charge.
OpenLumin is the library of named sources. ChatLumin is where you prepare with it. One free account works in both.
Free to start. 25 questions a day, no credit card.
Watch a Christmas Eve sermon go from the eight prep stages, to a cited word study, to slides you edit yourself.
“I'm a Logos user and recently came upon OpenLumin. It is quick and concise, and so far has been accurate. I appreciate your candour and honest approach.”
“OpenLumin is truly a tool that helps every sincere believer go deeper in studying God's Word. It has been a blessing to me.”
“Now a daily scriptural tool for me!”
“Great source for gathering facts and biblical truths.”
A project of AI Fluency Ministry. No ads, no data sold, no venture pressure. Using it in your ministry? Tell us →
Eight stages from text to Sunday. You lead every one.
AI is now good enough to write a whole sermon. That is the problem. ChatLumin gives the AI a stated role at each stage, and keeps your reading, your taste, and your experience of your people at the centre.
- 01AI role: minimalText selectionIt can suggest passages. You choose.
- 02AI role: noneFirst reading and prayerBefore any research, it asks whether you have read the text cold and prayed over it.
- 03AI role: significantExegetical researchOriginal languages, setting, cross-references, and named commentators, every claim cited.
- 04AI role: moderateStructure and big ideaIt tests the movements you propose. It does not supply the big idea.
- 05AI role: moderateIllustrationIt never invents a story or a statistic. Real-life stories are yours to bring.
- 06AI role: limitedApplicationApplication needs someone who knows these people. That is you.
- 07AI role: minimalManuscript or notesA research librarian, not a ghostwriter. It does not write the manuscript.
- 08AI role: moderateReviewIt checks your draft against Scripture, the creeds, and your tradition before you preach.
Prepare your way: write your own skills, or answer a few questions and ChatLumin drafts one for you to review. The sermon workflow and your own skills are part of Lumin. Read the standard →
You shouldn't. That's the point.
ChatLumin doesn't generate theology — it retrieves it. Every claim carries a badge: verified means we hold the source text; trainingmeans it comes from the model's reading, clearly labeled. And when neither exists, you get our most important answer: “No strong answer — and we won't invent one.”
Bring the text. Check the evidence. Preach what you can stand behind.
A preparation workspace, not a chat log.
Conversations are the starting point. Everything below exists so a good answer becomes something you can review, keep, and teach from.
Also in Lumin: documents as Markdown, DOCX, or PDF · slides with PowerPoint export · generated images · the sermon workflow, small-group guides, and skills you write yourself.
Built for pastors first. Open to anyone studying Scripture.
Leading a group this week? Download a free printable Bible study →
The same evidence, inside Claude and your other AI tools.
ChatLumin publishes the OpenLumin research library as an MCP server. Connect it to Claude or any MCP-capable client and every answer there can cite the same named works — verses, interlinear text, commentaries, manuscripts, people, places, and timelines.
- 1. Open Settings → Usage & billing and choose MCP Pass or Lumin.
- 2. Add the ChatLumin MCP server to your client and sign in when it asks.
- 3. Ask there. Citations come from the same corpus as ChatLumin.
Already paying for the OpenLumin MCP Pass? It is recognised in ChatLumin automatically.
Free to ask. Pay only when you want to keep more.
Start free. Upgrade when you want the corpus in other tools, or when research needs to become a handout, a Study, or a slide deck.
No credit card for Free. Upgrade or cancel any time from Settings → Usage & billing in ChatLumin. Daily limits reset at midnight (UTC+8).
Before you ask your first one.
The things people ask before they trust a tool with Scripture. Anything missing? Email us.
Is OpenLumin the same thing as ChatLumin?
OpenLumin is the research library: the named, licensed works and reference data listed on the corpus page. ChatLumin is the workspace where you ask questions against that library and keep what you find. One account works in both, with the same email and password.
I already had an OpenLumin account. Do I need to sign up again?
No. OpenLumin accounts were imported into ChatLumin, so sign in there with the email and password you already use. If your email was never verified, ChatLumin may ask you to confirm it once. Your existing Ask threads stay readable on openlumin.com; new questions and follow-ups continue in ChatLumin.
Will it write my sermon for me?
No. ChatLumin helps you prepare the sermon; it does not write it for you. Before any research it asks whether you have read the passage and prayed over it. Then it does the exegetical research with every source named, tests the structure you propose, and checks your draft before you preach. It does not supply the big idea, it never invents an illustration, and it does not write the manuscript. The direction, the judgment, and the voice stay yours.
How do I know an answer is not made up?
Every claim carries a label. Verified means we hold the source text and you can open it. Training means it comes from the model's own reading and is marked as such. When neither exists you get a plain answer: no strong answer, and we will not invent one.
Which traditions and denominations does the corpus cover?
The corpus is strongest in public-domain Protestant commentary, open-licensed reference data, and original-language resources, plus permitted-use denominational documents. It is not yet a comprehensive Catholic or Orthodox library, and we say so rather than pretend otherwise. Every source is listed with its license.
What does the free plan include, and can I cancel a paid plan?
Free includes 25 questions a day, cited answers, file and Study attachments, Research Notes, projects, and sharing, with no credit card. MCP Pass adds daily capacity and the MCP server. Lumin adds the sermon preparation workflow, ministry plugins, Studies, documents, and slides. Upgrade or cancel any time from Settings, then Usage and billing, inside ChatLumin.
What is the MCP Pass?
MCP Pass publishes the OpenLumin research library as an MCP server, so Claude and other MCP-capable clients can cite the same named works: verses, interlinear text, commentaries, manuscripts, people, places, and timelines. It costs three dollars a month and is included in Lumin.
Who is behind OpenLumin?
OpenLumin is a project of AI Fluency Ministry. There are no ads and no data sold. Asking is free and will stay free; Lumin and MCP Pass subscriptions cover the cost of licensing scholars and running the infrastructure.
comes with its sources.