Terra

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.

Terra publishes 11 API contracts indexed on the APIs.io network, including Activity API, Athlete API, Authentication API, and 8 more. Tagged areas include Wearables, Health Data, Fitness, Aggregator, and Webhook.

The Terra catalog on APIs.io includes 1 Spectral governance ruleset.

Terra’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.0/100 thin ▬ flat Agent 22/100 agent aware Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Wearables Health Data Fitness Aggregator Webhook Digital Health

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 28.0/100 · thin

Contract Quality 9.4 / 19

Developer Ergonomics 4.7 / 15

Access Clarity 1.0 / 15

Operational Transparency 1.2 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 0.7 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 31.0 — up to +13.8 composite points Ask about this →
Contract Quality scores 50.3 — up to +12.4 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/terra-api/apis.yml: open an issue on github.com/api-evangelist/terra-api to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Health and Wellness (consumer health, fitness, wearables)	coverage	46.0	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 11

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

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.

Scroll for all 11

Open Collections 11

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

Terra Activity API

OPEN COLLECTION

Terra Activity Athlete API

OPEN COLLECTION

Terra Activity Authentication API

OPEN COLLECTION

Terra Activity Body API

OPEN COLLECTION

Terra Activity Daily API

OPEN COLLECTION

Terra Activity Integrations API

OPEN COLLECTION

Terra Activity Menstruation API

OPEN COLLECTION

Terra Activity Nutrition API

OPEN COLLECTION

Terra Activity Sleep API

OPEN COLLECTION

Terra Activity Users API

OPEN COLLECTION

Terra API

OPEN COLLECTION

Scroll for all 11

Terra API pricing

Not yet checked against Terra's own pricing page. Compiled by API Evangelist on 2026-07-03 from tryterra.co/pricing; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Included Monthly Credits free	—
Usage-Based Credits usage	—
Blood Report API usage	—
Enterprise / Custom enterprise	—

Plan details, limits and sources →

Rate limits

Per-Request Day Span: 1825 days
Cumulative Hourly Day Budget: 6000 days
Webhook Delivery: not rate-limited events

Compiled by API Evangelist, not yet checked against Terra's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Terra Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Terra Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Terra Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Terra API Rules

62 rules · 60 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

Terra Authentication

apiKey · 2 schemes

SECURITY

Terra Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Terra Agentic Access

16 operations · 4 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: terra-api
url: https://raw.githubusercontent.com/api-evangelist/terra-api/refs/heads/main/apis.yml
name: Terra
kind: company
description: 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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/terra-api.png
x-docs-platform: gitbook
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
tags:
- Wearables
- Health Data
- Fitness
- Aggregator
- Webhook
- Digital Health
tags_raw:
- Wearables
- Health Data
- Fitness
- Aggregator
- Webhooks
- Digital Health
created: '2026-07-03'
modified: '2026-07-03'
specificationVersion: '0.23'
apis:
- aid: terra-api:terra-api-webhooks
  name: Terra Webhooks
  tags:
  - Webhook
  - Data Streaming
  - Event
  tags_raw:
  - Webhooks
  - Data Streaming
  - Events
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.tryterra.co/health-and-fitness-api/integration-setup/setting-up-data-destinations/webhooks
  baseURL: https://api.tryterra.co/v2
  properties:
  - url: https://docs.tryterra.co/health-and-fitness-api/integration-setup/setting-up-data-destinations/webhooks
    type: Documentation
  - url: https://docs.tryterra.co/reference/health-and-fitness-api/event-types
    type: APIReference
  description: Terra's primary data-delivery mechanism. Rather than a polling or WebSocket transport, Terra streams normalized
    health data and lifecycle events - auth, deauth, connection errors, and activity/body/daily/sleep/nutrition/ menstruation
    payloads - by HTTP POST to a developer-configured webhook endpoint, signed for verification. Historical data requests
    with to_webhook=true are fulfilled asynchronously to this same destination.
- aid: terra-api:terra-api-activity-api
  name: Terra Activity API
  description: Workout and exercise sessions.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Activity
  properties:
  - type: OpenAPI
    url: openapi/terra-api-activity-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-athlete-api
  name: Terra Athlete API
  description: Connected-user athlete profile and demographics.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Athlete
  properties:
  - type: OpenAPI
    url: openapi/terra-api-athlete-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-authentication-api
  name: Terra Authentication API
  description: Connect and disconnect end-user wearable and health accounts.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/terra-api-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-body-api
  name: Terra Body API
  description: Body and biometric measurements.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Body
  properties:
  - type: OpenAPI
    url: openapi/terra-api-body-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-daily-api
  name: Terra Daily API
  description: Day-level aggregated summaries.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Daily
  properties:
  - type: OpenAPI
    url: openapi/terra-api-daily-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-integrations-api
  name: Terra Integrations API
  description: Catalog of supported wearables, trackers, and health apps.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Integration
  tags_raw:
  - Integrations
  properties:
  - type: OpenAPI
    url: openapi/terra-api-integrations-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-menstruation-api
  name: Terra Menstruation API
  description: Menstrual cycle and reproductive health data.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Menstruation
  properties:
  - type: OpenAPI
    url: openapi/terra-api-menstruation-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-nutrition-api
  name: Terra Nutrition API
  description: Logged nutrition and dietary intake.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Nutrition
  properties:
  - type: OpenAPI
    url: openapi/terra-api-nutrition-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-sleep-api
  name: Terra Sleep API
  description: Sleep sessions and stages.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - Sleep
  properties:
  - type: OpenAPI
    url: openapi/terra-api-sleep-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
- aid: terra-api:terra-api-users-api
  name: Terra Users API
  description: Look up and manage connected users and subscriptions.
  humanURL: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  baseURL: https://api.tryterra.co/v2
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/terra-api-users-api-openapi.yml
  - type: Documentation
    url: https://docs.tryterra.co/health-and-fitness-api/user-authentication
  - type: APIReference
    url: https://docs.tryterra.co/reference/health-and-fitness-api/readme
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/data-models
  - type: Documentation
    url: https://docs.tryterra.co/reference/health-and-fitness-api/supported-integrations
common:
- type: AgenticAccess
  url: agentic-access/terra-api-agentic-access.yml
- type: DomainSecurity
  url: security/terra-api-domain-security.yml
- type: Authentication
  url: authentication/terra-api-authentication.yml
- type: GitHubOrganization
  url: https://github.com/tryterra
- type: LinkedIn
  url: https://www.linkedin.com/company/terraapi
- type: Website
  url: https://tryterra.co
- type: Documentation
  url: https://docs.tryterra.co
- type: Plans
  url: plans/terra-api-plans-pricing.yml
- type: RateLimits
  url: rate-limits/terra-api-rate-limits.yml
- type: FinOps
  url: finops/terra-api-finops.yml
- type: Blog
  url: https://www.tryterra.co/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Terra API — frequently asked questions

Does Terra have an API?

Yes. APIs.io lists 11 APIs from Terra, including Terra Webhooks, Terra Activity API and Terra Athlete API, and 8 more.

Is there an OpenAPI specification for the Terra API?

Yes. APIs.io indexes 10 OpenAPI specifications for Terra, each linked for download from this page.

How do I authenticate with the Terra API?

Terra uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Terra Authentication.

How much does the Terra API cost?

APIs.io lists 4 pricing plans for Terra, with each plan's price, limits and inclusions under Pricing on this page.

Is the Terra API ready for AI agents?

Terra has a Kin Score of 28.0 out of 100 (thin) and an Agent Readiness score of 22.1 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

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