Fullstory

FullStory captures every user interaction on a web or mobile application — clicks, scrolls, form inputs, page navigation — and makes sessions replayable and queryable. For agents, the REST API enables: searching for sessions by user attributes or event criteria, looking up user profiles, exporting event data for analysis, and querying segments. The primary data capture is via JavaScript snippet (client-side); the REST API is the backend query surface. Used for diagnosing UX issues (rage clicks, form abandonment, error correlation) and understanding conversion funnels. Confidence is docs-derived.

REST API at api.fullstory.com/v2. Resources: sessions, users, segments, events, exports. GET /v2beta/users/{uid} retrieves a user's FullStory profile and session summary. GET /v2beta/sessions?users={uid} retrieves sessions for a user (with replay URL). POST /v2beta/segments/batch/get queries users in a segment. POST /v2beta/exports creates a data export job (event-level data to S3/GCS). GET /v2beta/exports/{id} polls export status. JavaScript capture snippet: window.FS.identify(uid, {attributes}) links app user IDs to FullStory sessions. REST API responses are JSON.

API key auth: Authorization: Basic {base64(api_key:)} header — API key as username, empty password. API keys from FullStory Settings → API Keys. Organization-level keys with full read access. HTTPS enforced. No OAuth2. JavaScript snippet uses an org-specific snippet key (public, for capture). Data export jobs access S3/GCS buckets you configure. Token rotation via FullStory settings.

Standard HTTP status codes with JSON error bodies. 401 for invalid API key, 404 for missing user/session, 429 for rate limit. Data export jobs are async: poll /v2beta/exports/{id} until status is 'completed'. Export URLs are time-limited S3/GCS signed URLs. FullStory platform uptime at status.fullstory.com. Session replay data retention: 12 months by default (plan-dependent). Rate limits per plan tier — REST API rate limits more restrictive than capture-side.

developer.fullstory.com provides the REST API reference, JavaScript snippet documentation, mobile SDK guides (iOS/Android), data export configuration, and segment query documentation. Documentation quality is good. Getting started requires a FullStory account (14-day trial; no meaningful free tier). API key creation documented. Data export requires S3 or GCS bucket configuration. Community support via FullStory Community and support portal.