Know what every error means — and how to fix it.
ErrLookup is a structured, AI-assisted knowledge base of errors thrown by popular open-source libraries. Built for coding agents (MCP), answer engines (JSON + llms.txt), and humans (these pages).
815 errors across 7 repos.
Dataset version 2026-08-01T05:21:06.426Z.
Install the MCP server
{
"mcpServers": {
"errlookup": {
"command": "npx",
"args": [
"-y",
"@errlookup/mcp"
]
}
}
} Repos
| Repo | Language | Errors | Stars |
|---|---|---|---|
| sindresorhus/is | — | 100 | 0 |
| axios/axios | — | 45 | 0 |
| expressjs/express | — | 22 | 0 |
| clap-rs/clap | — | 0 | 0 |
| pallets/flask | — | 66 | 0 |
| psf/requests | — | 37 | 0 |
| gohugoio/hugo | — | 545 | 0 |
Honest provenance: every record is AI-assisted analysis of the cited commit. See the dataset contract in API docs.