Highlight.io API
Highlight.io — open-source, full-stack observability platform with session replay, error monitoring, and log management in a single tool, with REST API for programmatic access to errors and sessions.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Apache 2.0 open source — auditable. Self-hosted for data sovereignty. SOC2 for cloud. GDPR compliant. No scope granularity on API tokens is a limitation.
⚡ Reliability
Best When
Your agent product has a web frontend and you need session replay + errors + logs in a single open-source tool that you can self-host.
Avoid When
You only need backend error monitoring without session replay — Sentry or Honeybadger are simpler.
Use Cases
- • Agents querying error data to automatically triage and route bugs based on impact and frequency
- • Session replay retrieval — agents fetching session recordings when users report issues for automated debugging context
- • Log querying — agents searching structured logs for specific patterns during incident investigation
- • Error alerting automation — agents receiving Highlight webhooks for new errors and triggering automated triage workflows
- • User journey analysis — agents correlating session replays with error events for root cause investigation
Not For
- • High-volume production error monitoring at extreme scale — Sentry or Datadog have better scaling for enterprise
- • Infrastructure-level metrics and APM — Highlight focuses on frontend/fullstack, not server metrics
- • Teams not needing session replay — simpler error-only tools like Sentry are less complex
Interface
Authentication
Personal Access Token for API access. GraphQL API for queries. Project identifier for SDK initialization. Self-hosted instances manage their own auth.
Pricing
Open source under Apache 2.0 — self-hosted is free. Cloud tier for managed hosting. Generous free tier for small applications.
Agent Metadata
Known Gotchas
- ⚠ Primary API is GraphQL — agents must construct GraphQL queries, not simple REST calls
- ⚠ Session replay data is large — agents should paginate and filter before fetching full session data
- ⚠ Self-hosted Highlight requires significant infrastructure (ClickHouse, Kafka, Redis) — not a quick deploy
- ⚠ Free tier session limits can be reached quickly — agents testing at volume need paid plan
- ⚠ Error grouping algorithm affects how duplicate errors are counted — grouping may not match agent expectations
Alternatives
Full Evaluation Report
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Scores are editorial opinions as of 2026-03-07.