# Terra

**Canonical:** https://apis.io/providers/terra-api/  
**Website:** https://tryterra.co  
**APIs profiled:** 11

Terra is a unified wearables and health-data API that aggregates data from 500+ wearables, fitness trackers, and health apps - Garmin, Fitbit, Oura, Apple Health, Whoop, Strava, Google Fit, Polar, Withings, and many more - behind a single normalized REST interface. Developers connect end users through the Terra Widget or a custom authentication flow, then receive normalized Activity, Body, Daily, Sleep, Nutrition, Menstruation, and Athlete data. Terra's primary delivery model is asynchronous - requested and newly available health data is streamed to a developer-configured webhook destination rather than returned inline, with REST read endpoints available for on-demand historical pulls.

## Kin Score — 37.9 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 37.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 55.9 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Health**: 15.0 (matched via tags).

## Agent readiness — 22.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (11)

- **Terra Webhooks** — Terra's primary data-delivery mechanism. Rather than a polling or WebSocket transport, Terra streams normalized health data and lifecycle events - auth, deauth, connection error...
- **Terra Activity API** — Workout and exercise sessions.
- **Terra Athlete API** — Connected-user athlete profile and demographics.
- **Terra Authentication API** — Connect and disconnect end-user wearable and health accounts.
- **Terra Body API** — Body and biometric measurements.
- **Terra Daily API** — Day-level aggregated summaries.
- **Terra Integrations API** — Catalog of supported wearables, trackers, and health apps.
- **Terra Menstruation API** — Menstrual cycle and reproductive health data.
- **Terra Nutrition API** — Logged nutrition and dietary intake.
- **Terra Sleep API** — Sleep sessions and stages.
- **Terra Users API** — Look up and manage connected users and subscriptions.

## Agentic access (1)

- **Terra Api Agentic Access** — 16 operations · 5 acting

## Security (2)

- **Terra Api Authentication** — apiKey · 2 schemes
- **Terra Api Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Terra Api Plans Pricing**

## Tags

Wearables, Health Data, Fitness, Aggregator, Webhook, Digital Health

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