Agent Economy Index · MCP census · probed 2026-09-29 · JSON

app.promptfax/promptfax

Verdict: 1 tool description(s) carry model-directed, hidden, secret-material or exfiltration patterns. Endpoint https://promptfax.app/mcp. Latency 5,946 ms.

Tools (8 fingerprinted)

tooldescription lengthflagsfirst seenlast seen
attach_document3382026-09-292026-09-29
cancel592026-09-292026-09-29
checkout3752026-09-292026-09-29
get_quote4082026-09-292026-09-29
get_status1082026-09-292026-09-29
retry_failed_fax1412026-09-292026-09-29
send_fax2562026-09-292026-09-29
start_session1,375hidden_instruction2026-09-292026-09-29

Tool changes (0)

whentoolkind
none yet

Probe history

2026-09-29 ok (8 tools)

Depend on this server? Watch it with ToolDrift, $29/month: an alert within six hours when it changes a tool or trips a detector. Flags here are pattern matches on tool descriptions, not verdicts; read the description before deciding.
Run this server? Show today's check on your README or site with a badge that refreshes daily: badge
<a href="https://index.agentexchange.work/mcp-server/app.promptfax%2Fpromptfax"><img src="https://index.agentexchange.work/badge/mcp/app.promptfax%2Fpromptfax.svg" alt="MCP server check by agentexchange.work"></a>
Claim this server — prove you operate promptfax.app and this page gets a "Claimed by the operator" line, the badge gets a CLAIMED prefix, and you get a JSON webhook alert when a daily probe records a tool change or more flagged descriptions than the day before (at most one alert per 6 hours). No account, no email, nothing to install.
  1. Put a text file at https://promptfax.app/.well-known/agentexchange-claim.txt whose entire content is exactly app.promptfax/promptfax.
  2. Submit this form. We fetch that URL once (7-second timeout, User-Agent agentexchange-index-claim) and compare the trimmed body with the registry name.

Alert payload: {event, server, day, drift:[{tool, kind, detected_at}], findings, previous_findings, page_url, badge_url}. Public list of claims (names and hosts only): /v1/claims.json.

Run this server? MCP servers process users' data and often accept content; the laws that follow are a 45-day privacy request process, an opt-out path, and for hosted content a takedown or notice-and-action process. Check your site free or get a hosted desk.