Open-access availability for 120M+ scholarly articles via the Unpaywall API
Connect Runs on your machine
claude mcp add unpaywall -e UNPAYWALL_EMAIL=<UNPAYWALL_EMAIL> -- uvx unpaywall-mcp-server==1.0.1
{
"mcpServers": {
"unpaywall": {
"command": "uvx",
"args": [
"unpaywall-mcp-server==1.0.1"
],
"env": {
"UNPAYWALL_EMAIL": "<UNPAYWALL_EMAIL>"
}
}
}
}
{
"mcpServers": {
"unpaywall": {
"command": "uvx",
"args": [
"unpaywall-mcp-server==1.0.1"
],
"env": {
"UNPAYWALL_EMAIL": "<UNPAYWALL_EMAIL>"
}
}
}
}
{
"servers": {
"unpaywall": {
"type": "stdio",
"command": "uvx",
"args": [
"unpaywall-mcp-server==1.0.1"
],
"env": {
"UNPAYWALL_EMAIL": "<UNPAYWALL_EMAIL>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
UNPAYWALL_EMAILRequired | Your email address — required by the Unpaywall API as an identifier (no API key needed). See https://unpaywall.org/products/api |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 4 Jul 2026 |
| Last updated | 4 Jul 2026 |
| Registry name | io.github.SMABoundless/unpaywall |
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