# meta-externalagent

What this client asked https://www.pathwren.workers.dev for, from that host's own request log.
Window: 2026-09-03 00:05:33Z to 2026-09-03 06:24:31Z UTC. Generated 2026-09-03.

## User-agent strings, exactly as they arrived

- `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 (compatible; meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))` — 9 request(s), 7 address(es), 2026-09-03 00:27:45Z to 2026-09-03 06:15:15Z
- `Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 (compatible; meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))` — 6 request(s), 6 address(es), 2026-09-03 00:22:46Z to 2026-09-03 06:02:51Z
- `Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 (compatible; meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))` — 3 request(s), 3 address(es), 2026-09-03 00:05:33Z to 2026-09-03 06:09:55Z
- `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.0 (compatible; meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler))` — 2 request(s), 2 address(es), 2026-09-03 05:12:51Z to 2026-09-03 06:24:31Z

- Requests: 20
- Distinct addresses (salted hashes, never published): 15
- Distinct paths: 20
- Visits (30-minute gap rule): 5
- Status codes: 200×19, 404×1
- Accept headers: */*
- Our classifier called it: crawler×20 (ours, from the user-agent)

## What it asked for, in order

1. `/c/rubygems-registry/` — 2026-09-03 00:05:33Z — 200
2. `/data/agents.json` — 2026-09-03 00:22:46Z — 200
3. `/openapi.json` — 2026-09-03 00:27:45Z — 200
4. `/documents.json` — 2026-09-03 00:36:59Z — 200
5. `/mcp-triage.html` — 2026-09-03 01:08:57Z — 200
6. `/mcp-netcheck.html` — 2026-09-03 02:05:51Z — 200
7. `/mcp-doctor.html` — 2026-09-03 02:24:28Z — 200
8. `/llms.txt` — 2026-09-03 03:57:12Z — 200
9. `/status.json` — 2026-09-03 04:03:17Z — 200
10. `/a2a` — 2026-09-03 04:14:11Z — 200
11. `/tools/verification-methods` — 2026-09-03 04:31:27Z — 200
12. `/.well-known/ai-catalog.json` — 2026-09-03 04:43:05Z — 200
13. `/status.html` — 2026-09-03 05:12:51Z — 200
14. `/terms.html` — 2026-09-03 05:55:32Z — 200
15. `/tools/index.json` — 2026-09-03 06:02:51Z — 200
16. `/data/ip-sources.json` — 2026-09-03 06:05:09Z — 200
17. `/tools/classify-ua` — 2026-09-03 06:09:55Z — 200
18. `/mcp.` — 2026-09-03 06:13:33Z — 404
19. `/crawler/` — 2026-09-03 06:15:15Z — 200
20. `/tools/example` — 2026-09-03 06:24:31Z — 200

## What it asked for that did not exist

- `/mcp.` — 404×1 — first asked 2026-09-03 06:13:33Z; still absent

## Verification

no published verification methodFrom the crawler record at /crawler/meta-externalagent.html, which cites https://developers.facebook.com/docs/sharing/webmasters/web-crawlers — one source for both pages.

## What it publishes about you

Not observed. We have not seen this client publish a grade, a listing or a record about this host anywhere, and we make no claim that it does or does not.

## Documentation it names

https://developers.facebook.com/docs/sharing/webmasters/crawler

JSON: https://www.pathwren.workers.dev/bot/meta-externalagent.json · all clients: https://www.pathwren.workers.dev/data/observed-clients.json