Faultline is answering right now. Last checked 2 min ago. Last commit 6 Nov 2026.
Checks the most important factual claims in AI output against live web sources by default.
We read the source, 1 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
return execSync(cmd, { cwd, encoding: 'utf8', stdio: ['pipe', 'pipe', 'pipe'] }).trim();
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.
claude mcp add faultline --transport http https://faultline-api.fly.dev/mcp
https://faultline-api.fly.dev/mcp
[mcp_servers.faultline]
url = "https://faultline-api.fly.dev/mcp"
{
"mcpServers": {
"faultline": {
"url": "https://faultline-api.fly.dev/mcp"
}
}
}
{
"servers": {
"faultline": {
"type": "http",
"url": "https://faultline-api.fly.dev/mcp"
}
}
}
This endpoint answered with an authorization challenge. The server is running, but it did not say what kind of credentials it expects.
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://faultline-api.fly.dev/mcp | streamable-http | needs auth | 372 ms | 2 min ago |
Fact-check claims against live web sources: verdict, consensus, cited sources, PII redaction.
Sub-cent factual claim verification against live data sources.
Sub-cent factual claim verification against live data sources.
Real-time fact-checking MCP. Verifies claims against live sources with structured verdicts.
Check the factual claims in a draft or an answer: a quick verdict, or a deep check with sources.
Reviews drafts: fact-checks claims against web sources and builds the strongest counter-case.
SEO and AI-search checks for a website's build output, fixed in the source files
Checks an AI agent's 'done' against the files and URLs it claims. Missing = FALSE_DONE.
Answers built from our own checks of this server.