# FACTANKER — machines are explicitly welcome here.
#
# MCP and REST are FREE: no API key, no registration, no rate-limit tier.
#   MCP  https://factanker.com/mcp    (11 tools: lookup_entity, get_facts,
#                                      search_facts, get_timeseries,
#                                      verify_claim, compare_entities,
#                                      describe_predicate, get_source,
#                                      query_template, list_templates,
#                                      mcp_server_history)
#                                     GET returns a self-description.
#   REST https://factanker.com/api/get_facts
#   Templates https://factanker.com/api/templates
#   Setup https://factanker.com/quickstart
#
#   Pro (bulk, feeds, licences) https://factanker.com/pro  -- kontakt@enerlio.de
#   Start here    https://factanker.com/llms.txt
#   For models    https://factanker.com/for-ai
#   Evidence      https://factanker.com/evidence
#
# Every page also exists as Markdown: append .md to its address.
# Source data: US federal public domain (17 U.S.C. 105) or CC0, stated per
# fact. Answers may be used freely; please cite the fact URL. See /lizenz.
#
# Running a crawler and need something? Write to crawl@enerlio.de — a bulk
# feed, a different serialisation, a schema that fits your pipeline, or just a
# heads-up that we are breaking something for you. We answer within a working
# day. (Added 15.10.2026: until today this file named no contact at all, and
# the address in our imprint was only visible with JavaScript, so a crawler
# operator had no way to reach us.)
# A named group replaces the * group, so each rule is repeated per agent.
User-agent: GPTBot
Allow: /
Disallow: /api/ask
User-agent: OAI-SearchBot
Allow: /
Disallow: /api/ask
User-agent: ClaudeBot
Allow: /
Disallow: /api/ask
User-agent: Claude-Web
Allow: /
Disallow: /api/ask
User-agent: PerplexityBot
Allow: /
Disallow: /api/ask
User-agent: Googlebot
Allow: /
Disallow: /api/ask
User-agent: Bingbot
Allow: /
Disallow: /api/ask
User-agent: *
Allow: /
Disallow: /api/ask
Sitemap: https://factanker.com/sitemap.xml