Commentlettercheck is listed as active in the registry but did not answer our last check. It exposes 1 tools.
Look up whether a US ticker has SEC comment-letter correspondence on file.
What changed 1
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 18 September 2026. No other catalogue keeps this.
Commentlettercheck does not always answer
Over the last week it answered 75.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
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 commentlettercheck --transport http https://www.edgethirteen.com/api/mcp/commentlettercheck{
"mcpServers": {
"commentlettercheck": {
"url": "https://www.edgethirteen.com/api/mcp/commentlettercheck"
}
}
}[mcp_servers.commentlettercheck]
url = "https://www.edgethirteen.com/api/mcp/commentlettercheck"{
"mcpServers": {
"commentlettercheck": {
"url": "https://www.edgethirteen.com/api/mcp/commentlettercheck"
}
}
}{
"mcpServers": {
"commentlettercheck": {
"url": "https://www.edgethirteen.com/api/mcp/commentlettercheck"
}
}
}Available tools 1
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
check_sec_comment_letters
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://www.edgethirteen.com/api/mcp/commentlettercheck | streamable-http | answering | 96 ms | 2 min ago |
Alternatives to Commentlettercheck
same job, measured the same wayWhether UTC day can have a leap second
SEC EDGAR fundamentals as agent tools: look up or screen US public companies. Free, no key, CC0.
Checks whether a company has signed a Leniency Agreement under the Anti-Corruption Law from the CNPJ
Check whether a company holds a UK or Netherlands work-visa sponsorship licence.
Check whether a path looks safe. No disk access.
Whether current UTC year has Feb 29
Whether the current UTC year is a leap year
Holdings, overlap, correlation and look-through risk for US ETFs, from issuer files, with no key.
Commentlettercheck — questions
Answers built from our own checks of this server.