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Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.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 yesterday
Install
Notanda (Beta)
Overview
Description from the maker (original English)
Every OpenAlex search stores its request, response and checksums so sources can be checked later.
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 on your computer
- Transport: stdio
- Category: Search & AI memory
- You need to fill in: HARVESTER_OPENALEX_API_KEY
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- You fill in yourself:
HARVESTER_OPENALEX_API_KEY
Values marked secret are keys to your account. Never share them or paste them into a chat.
You need
- PyPIPython’s uv installed (for the uvx command)
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"notanda": {
"command": "uvx",
"args": [
"notanda-mcp",
"--evidence-dir",
"your-value"
],
"env": {
"HARVESTER_OPENALEX_API_KEY": "your-value"
}
}
}
}Run this in your terminal
claude mcp add notanda --env HARVESTER_OPENALEX_API_KEY=your-value -- uvx notanda-mcp --evidence-dir your-valueFill in the empty values before running it.
This one needs values on its command line, so copy the settings and fill them in.
Or copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"notanda": {
"command": "uvx",
"args": [
"notanda-mcp",
"--evidence-dir",
"your-value"
],
"env": {
"HARVESTER_OPENALEX_API_KEY": "your-value"
}
}
}
}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.
This one needs values on its command line, so copy the settings and fill them in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"notanda": {
"type": "stdio",
"command": "uvx",
"args": [
"notanda-mcp",
"--evidence-dir",
"your-value"
],
"env": {
"HARVESTER_OPENALEX_API_KEY": "your-value"
}
}
}
}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.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
Values you fill in
- OpenAlex API key used for literature searches.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
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 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account RudiRegenwurm, 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Search & AI memoryi
- More stars than 0% of the other 5670 servers in this category
- Published to the registry more recently than 61% of the other 5670 servers in this category
- Basic checks equal to or better than 100% of the other 5670 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 Notanda (Beta) 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?
You need to fill in: HARVESTER_OPENALEX_API_KEY
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.1.0-beta.3) reached the registry 25 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.
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 21 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 2 months ago
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.
Notanda local MCP server — Beta
Every OpenAlex search stores its request, response and checksums so sources can be checked later.
Beta: an external developer's unassisted acceptance test is still pending. Technical tests do not replace that external usability and installation check.
This directory exposes Notanda's provenance-aware OpenAlex retrieval to local MCP clients. It is a separate notanda-mcp package, not a hosted service and not part of the notanda 1.3.2 package. It depends on that released core.
The component provides exactly two tools:
search_literature: search OpenAlex for OA works with a DOI and persist the request, provider observation, returned result and hashes under one evidence ID; the returnedreceiptis the SHA-256 ofmanifest.json.get_evidence: verify those hashes and return the original result by evidence ID without repeating the provider request. An optional caller-heldreceiptalso detects replacement of the payloads together with their manifest.
Both tool descriptions and every successful response warn that titles and metadata are unverified third-party content, not instructions.
It does not download full text, write to the Notanda corpus or Evidence Ledger, modify the web UI, expose a network server, or provide general agent reasoning.
Provenance and status
The implementation is adapted from the isolated branch experiment/local-mcp, commit 366bc2d4827aa915e2e58a82cd567163ed63d4be. The sealed handoff package bound that source to 20 passing MCP tests and a successful live OpenAlex run. For the public repository integration, the duplicated Notanda runtime was replaced by the released notanda==1.3.1 PyPI dependency. Beta 3 updates that pin to notanda==1.3.2; MCP remains pinned to the tested SDK version 1.30.0. SOURCE_PROVENANCE.json records the source hashes and the deliberate integration changes in machine-readable form.
Five of the six original acceptance criteria are technically satisfied. The sixth — an external developer with no Notanda knowledge completing installation, search, restart and independent verification without assistance — remains externally to be verified until that result is returned.
Install the Beta package
Use Python 3.11 or 3.12. A dedicated virtual environment is recommended:
python -m venv .venv-mcpLinux/macOS:
. .venv-mcp/bin/activate
Windows PowerShell instead:
.venv-mcp\Scripts\Activate.ps1
python -m pip install "notanda-mcp==0.1.0b3"
Beta 3 requires exactly notanda==1.3.2. Installing it into an environment already containing that version preserves the core version. Beta 2 requires notanda==1.3.1 and pip may downgrade an existing 1.3.2 installation to satisfy that pin. Use a separate environment if you need Beta 2 or a different Notanda core version; do not bypass dependency checks. The exact pin keeps the tested core/server combination reproducible; it does not promise compatibility with future core releases.
For a client that uses uvx, configure this command and arguments (replace the evidence directory with a writable absolute path on your computer):
uvx --python 3.12 notanda-mcp@0.1.0b3 --evidence-dir ABSOLUTE_LOCAL_EVIDENCE_PATHSet HARVESTER_OPENALEX_API_KEY in the MCP client's local environment. The key is required for searches and must not be placed in the command arguments. The registry manifest declares this variable as secret and the evidence path as a required input.
Install from this repository
Use Python 3.11 or 3.12. From the repository root:
python -m venv .venv-mcpLinux/macOS:
. .venv-mcp/bin/activate
Windows PowerShell:
.venv-mcp\Scripts\Activate.ps1
python -m pip install -e ./mcp
This installs the MCP component from the checkout and resolves the reviewed Notanda core as notanda==1.3.2 from PyPI.
Configure an OpenAlex API key locally. For example, in PowerShell without placing the key in terminal history:
$mcpSecureKey = Read-Host 'OpenAlex API key' -AsSecureString$env:HARVESTER_OPENALEX_API_KEY = [System.Net.NetworkCredential]::new('', $mcpSecureKey).Password
The existing Notanda configuration mechanisms also work: HARVESTER_CONFIG or HARVESTER_OPENALEX_API_KEY. Never add credentials to evidence directories, Git, screenshots or returned test reports.
Run and verify
The supplied real stdio client starts the server, initializes MCP, verifies the two tool names and executes a search:
python mcp/tools/mcp_client.py \--evidence-dir ./tmp/mcp-evidence \ --query "scientific reproducibility" \ --limit 2
The response contains an evidence_id and a receipt. Keep both outside the evidence directory. A second process can verify that receipt and retrieve the stored response without another provider request:
python mcp/tools/mcp_client.py \--evidence-dir ./tmp/mcp-evidence \ --id EVIDENCE_ID \ --receipt RECEIPT
For compatibility, get_evidence also works without receipt and performs the previous payload hash and identity checks. Those checks detect corruption, but a coordinated replacement of payloads and manifest is detectable only when the original receipt is supplied.
The independent verifier uses only the Python standard library:
python -S mcp/tools/verify_mcp_evidence.py \./tmp/mcp-evidence/EVIDENCE_ID
For another local MCP client, configure the virtual environment's notanda-mcp executable with these arguments:
--evidence-dir ABSOLUTE_LOCAL_EVIDENCE_PATHTransport is stdio. The server has no user interface and opens no listening port.
Evidence contract
Each search creates one directory named by its 32-character evidence ID:
| File | Contents |
|---|---|
request.json | supplied and effective query, limit, MCP client name/version, source experiment commit, installed Notanda version and server hash |
provider.json | attempted OpenAlex URL after secret redaction, timestamps, HTTP status and captured parsed JSON |
response.json | the persisted result, including structured failures and the untrusted-content notice; the detached receipt is added to the MCP response after sealing |
manifest.json | byte length and SHA-256 for the three payload files |
The manifest alone detects corruption or one-file modification. It is not a digital signature and, without a caller-held receipt, does not detect coordinated replacement of payloads and manifest. Comparing the optional receipt anchors the exact manifest observed during the original search.
Limits and failure behavior
- Query length: 1–1000 characters. Result limit: integer 1–10.
- One OpenAlex request, no pagination, no automatic retry.
- 20-second operation timeout, 10-second connection timeout, 4 MiB response ceiling.
- Only
https://api.openalex.org/worksis accepted as the provider endpoint. - Missing key:
configuration_error; invalid input:invalid_arguments. - Provider/transport failure:
provider_error; no provider exception text is stored. - Interrupted write:
incomplete; hash or identity mismatch:integrity_failure; supplied receipt mismatch:receipt_mismatch. - Provider text is persisted as untrusted data, never interpreted as instructions.
Tests
Install the development extra and run the 23 deterministic checks:
python -m pip install -e "./mcp[dev]"python -m pytest mcp/tests
The tests cover successful retrieval, restart, independent verification, corruption, invalid input, HTTP 401/429/500, timeouts, malformed and oversized responses, storage failure, process death, secret redaction and real two-process stdio MCP operation.