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Highlight (highlight.io)

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.

agent aware

Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.

Kin Score

API Evangelist profiles Highlight (highlight.io) the way a machine reads it — 58 machine-readable artifacts across 8 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Highlight (highlight.io) scores 72.0/100 (exemplar), with a separate agent-readiness read of 39/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 72.0/100 · exemplar
Contract Quality 16.2 / 25
Developer Ergonomics 10.0 / 20
Commercial Clarity 15.8 / 20
Operational Transparency 10.9 / 13
Governance 10.4 / 12
Discoverability 8.8 / 10
Agent readiness — 39/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Highlight (highlight.io)

Each block below is one kind of artifact we hold for Highlight (highlight.io). For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 8

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

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

Scroll within the panel for all 8 ·

Postman Collections 4

A runnable collection turns the contract into something a developer can execute in seconds. We profile them because the fastest way to trust an API is to make a real call against it.

Ready-to-run Postman collections for exercising this provider's APIs.

Open Collections 5

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Arazzo Workflows 10

Real integrations are rarely a single call. Arazzo describes the multi-step sequences — auth, then create, then confirm — so both a human and an agent can follow the choreography, not just the endpoints.

Multi-step API workflows described with the Arazzo specification.

Highlight Backend Error Report

Record a backend error as an OTLP error span and a matching error log so Highlight groups it into an error group.

ARAZZO

Highlight Backend Session Payload

Mark the backend as set up for a project, then push backend errors and logs against a session secure id.

ARAZZO

Highlight Browser Session Lifecycle

Initialize a browser session, identify its user, then push a recording payload using the returned session secure id.

ARAZZO

Highlight Correlated Backend Telemetry Export

Export traces, then logs, then metrics for the same project and trace so backend signals correlate in Highlight.

ARAZZO

Highlight Frontend Error Capture

Open a browser session and push a payload of frontend errors so Highlight groups them against the replay.

ARAZZO

Highlight Fullstack Error Correlation

Open a session, push a frontend error, then push a backend error keyed to the same session so both group against one replay.

ARAZZO

Highlight Fullstack Session Correlation

Open a browser session, then emit a backend OTLP span tagged with that session id so frontend replay and backend trace correlate.

ARAZZO

Highlight Logs and Metrics Batch

Submit a batch of OTLP logs and then a batch of OTLP metrics for the same Highlight project in one pass.

ARAZZO

Highlight Session Feedback Capture

Open a session, attach searchable session properties, then record end-user feedback against that session.

ARAZZO

Highlight Session Track Event

Open a session, attach track-event properties to it, then flush a recording payload.

ARAZZO

Scroll within the panel for all 10 ·

GraphQL 1

Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.

GraphQL schemas published by this provider.

Highlight (highlight.io) GraphQL API

GraphQL-over-HTTP session replay ingestion endpoint at `https://pub.highlight.io` used by the `highlight.run` browser SDK to upload rrweb DOM snapshots, console/network recordin...

GRAPHQL

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Highlight Io Rate Limits

7 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Features 19

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Session replay built on rrweb with canvas, iframe, and cross-origin support
Error monitoring with custom grouping, GitHub-issue linking, sourcemap support, and alerting
Logging with full-text search, pattern detection, and ClickHouse-backed sub-second queries
Distributed tracing with OpenTelemetry-native ingestion and waterfall visualization
Metrics (beta) with dashboards, monitors, and SQL editor
Native OTLP HTTP/JSON ingestion at otel.highlight.io for traces, logs, and metrics
Frontend correlation — server spans/logs join the originating browser session via highlight.session_id
AI-generated session insights and weekly digests
Webhook destinations for alerts (Error, Session, User, Log, Trace, Metric monitors)
25+ first-party integrations including Slack, Discord, Microsoft Teams, GitHub, Jira, Linear, ClickUp, Vercel, LaunchDarkly, Grafana, Amplitude, Mixpanel, Segment
Browser SDKs for React, Next.js, Remix, Vue, Angular, Gatsby, SvelteKit, Electron, React Native (beta)
Server SDKs for Node.js, Python, Go, Ruby, Rust, Elixir, Java, PHP, C# .NET
Hosting provider SDKs for AWS Lambda, Cloudflare Workers, Vercel, Firebase, Azure Functions, GCP
{"Privacy controls (`privacySetting"=>"strict | default | none`) with PII redaction"}
100% open source under Apache 2.0 (with separate commercial license for `highlight.io/` and `enterprise/` directories)
Self-hostable in three tiers — Dev (docker-compose), Hobby (single-host Docker), Enterprise (Kubernetes)
Powered by ClickHouse, Kafka, OpenTelemetry Collector, and Postgres
SOC 2 Type II, HIPAA, and ISO 27001 attestations available on the hosted offering
9,000+ GitHub stars; active CNCF-style community with 200+ contributors

Scroll within the panel for all 19 ·

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Highlight Io Context

0 classes · 8 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Highlight (highlight.io) API Rules

6 rules · 4 warnings

SPECTRAL

Highlight (highlight.io) API Rules

13 rules · 8 errors · 5 warnings

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Highlight Log Record (OTLP)

8 properties

JSON SCHEMA

Highlight Session

28 properties

JSON SCHEMA

Highlight Trace (OTLP)

1 properties

JSON SCHEMA

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Highlight Io Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Highlight Io Agentic Access

5 operations · 5 acting

5 operations · 5 acting

AGENTIC

Resources

Every other property we hold for Highlight (highlight.io) — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 4

Portal, sign-up, and the first successful call

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Access & Security 3

Authentication, authorization, and security posture

Learn 1

Tutorials, courses, talks, and written guidance

Company 3

The organization behind the API

Other 1

Properties that don't map to a standard resource type

← All providers · Data indexed from github.com/api-evangelist/highlight-io · machine-readable index on apis.io