# Highlight (highlight.io)

**Canonical:** https://apis.io/providers/highlight-io/  
**Website:** https://www.highlight.io  
**APIs profiled:** 8

Highlight (highlight.io) is the open-source, full-stack monitoring platform — session replay, error monitoring, logging, distributed tracing, and metrics in a single tool. Built on OpenTelemetry, rrweb, and ClickHouse, Highlight correlates server-side spans and logs back to the originating browser session so engineers can move from a customer report to the exact line of code in one click. Available as a hosted SaaS on three commercial tiers (Free / Pay-as-you-go / Business / Enterprise) and as a fully open-source self-hosted deployment (Dev / Hobby / Enterprise) under Apache 2.0.

## Kin Score — 66.6 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 66.6).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 63.5 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 84.2 |
| Developer Ergonomics | 59.5 |
| Commercial Clarity | 92.1 |
| Access Clarity | 92.1 |

## Agent readiness — 27.4 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (8)

- **Highlight Private GraphQL API** — Internal GraphQL API that powers the Highlight dashboard at `https://pri.highlight.io`. Used to list, search, and manage workspaces, projects, sessions, errors, logs, traces, da...
- **Highlight Webhooks API** — Outbound webhooks delivered when Highlight alerts fire. POST JSON payload to a customer-supplied URL with alert metadata (name, type, count), error/session/log/metric context, p...
- **Highlight Self-Hosted Deployment** — Self-hosted deployment of the open-source Highlight stack. Three tiers — Dev (single-host docker-compose), Hobby (single-host Docker for low-volume production), and Enterprise (...
- **Highlight (highlight.io) Logs API** — OpenTelemetry log ingestion
- **Highlight (highlight.io) Metrics API** — OpenTelemetry metric ingestion (beta)
- **Highlight (highlight.io) Sessions API** — Browser session ingestion mutations
- **Highlight (highlight.io) Traces API** — OpenTelemetry trace ingestion
- **Highlight (highlight.io) Webhooks API** — Inbound webhook delivery from Highlight

## Agentic access (1)

- **Highlight Io Agentic Access** — 5 operations · 5 acting

## Security (1)

- **Highlight Io Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Highlight Io Plans Pricing**

## Tags

Observability, Session Replay, Error Monitoring, APM, Logging, Tracing, OpenTelemetry, Open-Source, Frontend Monitoring, Full Stack Monitoring

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/highlight-io/). Scores are computed from the provider's own public artifacts under a published rubric.