Does a cited URL exist, and does the source name what your claim names? Two answers.
Connect Remote server
claude mcp add --transport http citation-check https://exmachina-ai.fly.dev/verify
{
"mcpServers": {
"citation-check": {
"url": "https://exmachina-ai.fly.dev/verify"
}
}
}
{
"servers": {
"citation-check": {
"type": "http",
"url": "https://exmachina-ai.fly.dev/verify"
}
}
}
Settings > Connectors > Add custom connector
URL: https://exmachina-ai.fly.dev/verify
Tools 2 found in our last check
check_citationFetch a URL and report whether it exists, and whether the source names the same entity as the claim you attach to it. These are two different questions and conflating them is the failure this exists to catch: a URL can return 200 and describe a different gene entirely. No accoun…
verdict_meaningsThe exact semantics of every status and relevance value, including what this checker cannot determine. Read once before trusting a verdict.
Details
| Endpoint | https://exmachina-ai.fly.dev/verify (Streamable HTTP) |
| First published | 14 Aug 2026 |
| Last updated | 14 Aug 2026 |
| Registry name | io.github.SecondStageTurbine/citation-check |
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