Labeler: Harper's Letter Labeler (did:plc:2dnldc4omasiothhuqbmosyx)

This is a labeler service. It publishes labels about posts and accounts on the Bluesky network.

Labeler

Harper's Letter Labeler
did:plc:2dnldc4omasiothhuqbmosyx

Classification

Declared declared

Reachability

auth_required

Auditability

medium

Class

third_party

First seen

24 Feb 2026, 9:08 PM UTC

Last seen

12 Apr 2026, 9:23 AM UTC

Events (24h)

Events (7d)

0 Silent volume

Targets (7d)

Subjects (7d)

Alerts

Links

Open on Bluesky · PLC directory

Why classified this way

Reason: declared+did_service+did_label_key+probe_auth_required

Classifier version: v1

Classified at: 2026-04-12T09:23:28.222040Z

Evidence surfaces

declared_record: true (2026-04-12T09:23:28.222040Z)

did_doc_label_key: true (2026-04-12T09:23:28.222040Z)

did_doc_labeler_service: https://ozone.harpersletter.fyi (2026-04-12T09:23:28.222040Z)

probe_result: auth_required (2026-04-12T09:23:28.222040Z)

declared_record: true (2026-04-12T09:11:38.867130Z)

did_doc_label_key: true (2026-04-12T09:11:38.867130Z)

did_doc_labeler_service: https://ozone.harpersletter.fyi (2026-04-12T09:11:38.867130Z)

probe_result: auth_required (2026-04-12T09:11:38.867130Z)

declared_record: true (2026-04-12T08:45:34.676148Z)

did_doc_label_key: true (2026-04-12T08:45:34.676148Z)

did_doc_labeler_service: https://ozone.harpersletter.fyi (2026-04-12T08:45:34.676148Z)

probe_result: auth_required (2026-04-12T08:45:34.676148Z)

declared_record: true (2026-04-11T20:31:48.830970Z)

did_doc_label_key: true (2026-04-11T20:31:48.830970Z)

did_doc_labeler_service: https://ozone.harpersletter.fyi (2026-04-11T20:31:48.830970Z)

probe_result: auth_required (2026-04-11T20:31:48.830970Z)

declared_record: true (2026-04-10T20:25:54.182805Z)

did_doc_label_key: true (2026-04-10T20:25:54.182805Z)

did_doc_labeler_service: https://ozone.harpersletter.fyi (2026-04-10T20:25:54.182805Z)

probe_result: auth_required (2026-04-10T20:25:54.182805Z)

Probe history

ts	status	http	latency	failure
12 Apr 2026, 9:23 AM UTC	auth_required	403	55ms	http_4xx
12 Apr 2026, 9:11 AM UTC	auth_required	403	182ms	http_4xx
12 Apr 2026, 8:45 AM UTC	auth_required	403	156ms	http_4xx
11 Apr 2026, 8:31 PM UTC	auth_required	403	321ms	http_4xx
10 Apr 2026, 8:25 PM UTC	auth_required	403	52ms	http_4xx
9 Apr 2026, 8:23 PM UTC	auth_required	403	71ms	http_4xx
8 Apr 2026, 8:22 PM UTC	auth_required	403	244ms	http_4xx
7 Apr 2026, 8:22 PM UTC	auth_required	403	309ms	http_4xx
6 Apr 2026, 8:16 PM UTC	auth_required	403	65ms	http_4xx
5 Apr 2026, 7:51 PM UTC	auth_required	403	162ms	http_4xx

Alerts timeline

Methods and caveats

What is a labeler? A third-party service that publishes tags (labels) about Bluesky posts or accounts. Clients choose which labelers to subscribe to and how to interpret labels (ignore / warn / hide).
This site observes labeler behavior only. No content analysis, no user profiling, no moderation actions.
Rules detect geometric patterns (rate anomalies, target distribution, churn). Thresholds are configurable.
Every alert includes a receipted hash over rule_id, config, inputs, and evidence for reproducibility.
Sparklines show hourly event counts over 7 days. Badges summarize which rules fired in the period.
Observation surface: label events from com.atproto.label.queryLabels and labeler declarations from com.atproto.sync.listReposByCollection. Does not observe content, profiles, or social graph.
Classification is based on structured evidence from multiple surfaces (registry declaration, DID document, endpoint probing, observed label activity). Each labeler page includes a "Why classified this way" expander with full evidence.