Context7
by upstash
Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.
Computer or cloud★ 64,224MITUpdated today
Install
CTlogs.io
Overview
Description from the maker (original English)
Certificate Transparency search: subdomains, certificate history and hostname keyword search.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Search & AI memory
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://mcp.ctlogs.io/mcpRun this in your terminal
claude mcp add --transport http ctlogs https://mcp.ctlogs.io/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"ctlogs": {
"url": "https://mcp.ctlogs.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"ctlogs": {
"type": "http",
"url": "https://mcp.ctlogs.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://mcp.ctlogs.io/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ABTdomain, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Search & AI memoryi
- More stars than 0% of the other 7254 servers in this category
- Published to the registry more recently than 36% of the other 7254 servers in this category
- Basic checks equal to or better than 100% of the other 7254 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is CTlogs.io safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 2 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Context7, Codebase Memory, Exa
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Codebase Memory
by DeusData
Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
Runs on your computer★ 48,148MITUpdated 20 days ago
Install
Exa
by exa-labs
Connect AI agents to Exa for web search, content fetching, and multi-step research.
Runs in the cloud★ 5,213MITUpdated last month
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
CTlogs.io MCP server
Certificate Transparency, inside the conversation you are already having.
CTlogs.io runs a hosted Model Context Protocol server. Connect it to Claude, Cursor, or any client that speaks MCP, and your assistant can query the certificate index itself: which certificates have been issued for a hostname, by which certificate authority, and when they expire; or which certificate sits behind a fingerprint. You ask; it looks it up; you work with what comes back.
https://mcp.ctlogs.io/mcpIt is the same index and the same account you use on ctlogs.io. What changes is who does the typing.
Connect
You need a CTlogs account with an active plan. Plans and allowances are on the pricing page.
Every client wants the same two things: the server address above, added as a remote or HTTP connector, and a sign-in. The client opens CTlogs in your browser, you sign in and approve the connection once. There is no key to copy and nothing to keep in a configuration file.
Claude Code
claude mcp add --transport http ctlogs https://mcp.ctlogs.io/mcpThen run /mcp inside Claude Code to complete the sign-in.
Claude (web and desktop)
Settings, then Connectors, then *Add custom connector*. Name it CTlogs, paste the server address, and follow the sign-in prompt.
Cursor
Add the server to your MCP settings (.cursor/mcp.json in a project, or the global file):
{"mcpServers": { "ctlogs": { "url": "https://mcp.ctlogs.io/mcp" } } }
Cursor offers the sign-in when it first connects to the server.
Other clients
Any client that supports MCP over Streamable HTTP with OAuth sign-in works the same way.
What your assistant can do
| Tool | The question it answers |
|---|---|
lookup_certificates | The certificate history of one hostname, or the certificate behind a fingerprint |
index_status | How large and how fresh the index is |
account_quota | How much of your allowance is left |
Listing the subdomains of a domain and searching hostnames for a keyword are DomainKits tools, from the same team; this server answers one question, which certificates exist for a name.
Every tool is read-only. Nothing the assistant can call changes anything.
The tools describe their own parameters to the client, so your assistant already knows how to call them. Current allowances and limits are on the pricing page and in the API documentation; they are not repeated here because they will change as the service settles in.
Things to ask
- "Which certificates have been issued for api.example.com, from which certificate authority, and when does the latest one expire?"
- "Has anyone other than our usual certificate authority issued for www.example.com?"
- "Look up the certificate with this fingerprint, and tell me which names it covers."
- "How much of my allowance is left?"
Good to know
- One account, every client. A laptop, an editor and a server can all be connected at once. They act as the same account, and usage is counted once.
- Made for asking, not exporting. Results are sized for a conversation. For bulk work, use the API directly.
- Public data, for security work. Everything in the index comes from public Certificate Transparency logs: hostnames and certificate metadata such as the issuing certificate authority, dates and fingerprints. The service does not support looking up personal information; queries take a domain name, a hostname, a fingerprint or a word inside a hostname. It is built for security, brand protection and infrastructure work.
- What the data means. The index is built from public Certificate Transparency logs. It tells you which names have had certificates issued, from which certificate authority and when; it does not tell you whether a host is live or what it serves. Read what Certificate Transparency actually tells you before drawing conclusions.
Who makes this
CTlogs.io is built on the technology behind ABTdomain.com, the domain intelligence platform, and shares its data and tooling with Domainkits.com, which covers domain search and newly registered domains. Certificate Transparency is one lens on the same picture: names appear in the domain registries, in DNS, and in the certificate logs, and the three sites look at the same names from those three sides.
Open source tools and datasets from the same team are on github.com/ABTdomain.
Support
Questions and problems: info@lyalpha-gmbh.com, or open a ticket from the member area.
CTlogs.io is operated by Lyalpha GmbH, Düsseldorf, Germany. Terms · Privacy · Imprint