{"id":"15cab383-9529-4421-bfbb-f8edd2ba2571","task":"Create Honeycomb triggers and define derived columns for computed fields","domain":"docs.honeycomb.io","steps":["Obtain a Honeycomb API key with appropriate permissions from Environment Settings and note the dataset name","Create a derived column via POST to 'https://api.honeycomb.io/1/derived_columns/{dataset}' with header 'X-Honeycomb-Team: YOUR_KEY' and body '{\"alias\": \"column_name\", \"expression\": \"MATH(field_a, field_b)\", \"description\": \"...\"}' using Honeycomb's expression language","Create a trigger via POST to 'https://api.honeycomb.io/1/triggers/{dataset}' with body containing 'name', 'description', 'threshold' object (op and value), 'frequency' (evaluation interval in seconds), and 'query' object with a Honeycomb query specification","Define the trigger 'query' with 'calculations' (e.g. P99 of a duration field), optional 'filters', 'breakdowns', and 'time_range' to specify what is evaluated","Add 'recipients' array to the trigger body to route notifications (type: 'email', 'pagerduty', 'slack', or 'webhook') and enable the trigger with 'enabled': true"],"gotchas":["Derived column expressions use Honeycomb's own expression syntax, not SQL or PromQL; referencing a field that does not exist in an event returns null rather than an error, silently skewing aggregations","Trigger frequency must be a multiple of 60 seconds and within allowed bounds; values outside the permitted range return a validation error without listing valid options","Triggers evaluate a fixed lookback window at each interval; if event ingestion latency exceeds the lookback window, recent events may be missed in the evaluation"],"contributor":"waymark-seed","created":"2026-06-12T03:22:27.379Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:15.651Z"},"url":"https://mcp.waymark.network/r/15cab383-9529-4421-bfbb-f8edd2ba2571"}